Maintenance Awareness test

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A chain drive system has a driver sprocket with 24 teeth and a driven sprocket with 72 teeth. If the driver shaft has 633 ft-lbs torque, the torque on the driven shaft will be __________. 133 ft-lbs 211 ft-lbs 1899 ft-lbs 3165 ft-lbs

1899 ft-lbs

This valve has two ports and two switching positions, allowing fluid to flow both ways through the valve. 3/2 way valve 4/2 way valve 4/3 way valve 2/2 way valve

2/2 way valve

Horsepower is the US customary system of measure for mechanical power. One horsepower equals __________ foot-pounds per second. 600 500 550 525

550

A __________ bolt size should be selected to fit through a 1/2-inch hole in the foot of a motor mount. 1/2-inch 7/16-inch 9/16-inch 1/4-inch

7/16-inch

Pascal's Law explains how __________. Fluid stays in a barrel A small jack can raise a two-ton car An oil tanker floats To calculate the force of gravity

A small jack can raise a two-ton car

Which one of the following logic elements describes a circuit with two normally open input switches in series? OR NAND AND NOT

AND

The __________ approves standards for pressure vessels in the United States. ASME USDA OSHA AIGA

ASME

The hydraulic tool holder is a type of what? Port Clamp Press Actuator

Actuator

The purpose of the Hydraulic system is to perform work in the real world. What component actually performs this work? Pump Reservoir Actuator Accumulator

Actuator

To find the total resistance in a series circuit, __________. Multiply the individual resistances Average the resistances Add the individual resistances Subtract the individual resistances

Add the individual resistances

What fluid is most commonly used in pneumatics? Air Oxygen Water Oil

Air

Which of the following actions can mechanical power transmission systems perform? Reverse direction of rotation Change the axis of rotation angle Convert between rotary and linear motion All of the above None of the above

All of the above

Which of the following is a function of a safety interlock switch? It stops the machine if the guard is removed. It prevents machine startup if the guard is not in place. It keeps the operator from moving machinery parts while the machine is powered. All of the above

All of the above

Which of the following is a rule for drawing a ladder diagram? Label all components Number all rungs Use only one load per rung All of the above

All of the above

Which of the following is an application of a relay? Performing control logic Seal-in circuit Energizing a fluid power valve solenoid All of the above

All of the above

Which of the following is an element of control logic? NOR AND NOT All of the above

All of the above

Check valves are used in hydraulics to __________. Control flow Control speed Block flow Control system pressure

Block flow

When the wire or foil strip inside a fuse melts, the fuse is said to be __________. Shot Done Blown Tripped

Blown

What is common between ball bearings and solid bearings? Both need lubricant Both need sleeves Neither need automated maintenance Neither need preventative maintenance

Both need lubricant

The three basic components of a chain drive are __________. Chain, roller, and pin Chain, drive sprocket, and driven sprocket Chain, master link, and roller Pins, rollers, and bushings

Chain, drive sprocket, and driven sprocket

This component allows an accumulator to charge and then maintain its pressure even after the pump stops. Directional Control Valve Check valve Reservoir Hose

Check valve

The difference between a fuse and a circuit breaker is __________. Circuit breakers are cheaper Circuit breakers can be reset and used again Fuses are reusable All of the above None of the above

Circuit breakers can be reset and used again

Often mechanical power is transmitted by a shaft. The shaft can be connected using three methods. Which method provides the ability to connect and disconnect while running? Universal joints Couplings Clutches Coaxial connectors

Clutches

There are different types of welding helmets. It is important that all of them __________. Contain a lens that filters out dangerous light rays while welding Contain a flip up lens to allow the welder to see his work easily Contain an auto-darkening lens that protects the eyes upon striking an arc Have a comfortable padded head size adjustment knob

Contain a lens that filters out dangerous light rays while welding

Turning outputs on or off through relay contacts is called __________. Control logic Bypass logic Indirect actuation All of the above

Control logic

A regulator is used in pneumatics to __________. Remove dirt from the air Shut-off the compressor Connect three branch circuits to a supply Control outlet pressure in a circuit

Control outlet pressure in a circuit

Which of the following is a true statement about DCV schematics? DCV schematics show only the default position of the DCV. DCV schematics never show how the DCV is operated. DCV schematics show all positions of the DCV. Blocked paths are omitted from DCV schematics.

DCV schematics show all positions of the DCV.

What method is used to determine the initial state of each output in the ladder diagram? Look at the outputs Determine the initial status of the inputs Look at the power diagram Look at the loads

Determine the initial status of the inputs

A power diagram is needed with a ladder diagram to __________. Determine the power device operation when the output is energized Show the logic of the circuit Determine what signals are sent to the power device All of the above

Determine the power device operation when the output is energized

Mechanical power transmission systems are designed to create straight-line or rotary motion. What changes can mechanical power transmission systems make beyond torque and speed? Mechanical advantage Direction of motion In-line motion Static motion

Direction of motion

Which component allows fluid to be routed to selected locations in the Hydraulic circuit? Directional Control Valve Pump Check valve Accumulator

Directional Control Valve

Filters should be used on all pneumatic systems because atmospheric air contains __________. Carbon Lead Dirt Viton

Dirt

In addition to dress rules, another rule to follow with machinery is __________. To have someone else in the work area Enter a work area while the machine is running Do not work on wet floors To keep tools out in the work area for easy access

Do not work on wet floors

This is used on a pneumatic schematic to show that branch lines split off the main line. Circle Triangle Dot Arrow

Dot

The poppet of a pressure regulator is opened by the __________. Upstream pressure Downstream pressure Adjustment spring Poppet spring

Downstream pressure

A control circuit that uses limit switches to sequence a series of events is called a(n) __________. Event sequencing circuit Follow the leader circuit Synchronized circuit Stair-step circuit

Event sequencing circuit

Double-acting cylinders can apply force in only one direction. Is this statement TRUE or FALSE? True False

False

In die forging, the workpiece is shaped with repeated blows from a powered hammer. Is this statement TRUE or FALSE? True False

False

Tennis shoes will adequately protect the feet from hot sparks. True False

False

The pressure created by any force is calculated by multiplying the total force by the total area. Is this statement TRUE or FALSE? True False

False

The pressure relief valve maintains the minimum pressure in the Hydraulic circuit. Is this statement TRUE or FALSE? True False

False

When using a degreaser to clean metal for welding, you should allow the degreaser to dry on the metal. True False

False

You do NOT need to inspect hoses and lines for damage. Is this statement TRUE or FALSE? True False

False

A spirit level can be used __________. In the vertical or horizontal position Only in the vertical position Only in the horizontal position In any position

In the vertical or horizontal position

Which of the following is not a component of a basic electrical circuit? Input Output Insulator Power supply

Insulator

Which of the following is NOT a consideration when checking hoses and lines? The tightness of fittings Kinking at flex points Thickness and color Cleanliness

Kinking at flex points

The weight of an object is determined by __________. Mass and gravity's force Gravity's force Specific force Mass and specific force

Mass and gravity's force

A chain puller is a tool used to hold two ends of a chain together while the __________. Driven sprocket is installed Chain is pulled through the sprockets Sag of the chain is decreased Master link is installed

Master link is installed

Chain sag is measured __________. At the driven sprocket Midway between the sprockets At the driver sprocket Does not have a measurement

Midway between the sprockets

A pushbutton switch with a return spring is called a(n) __________ switch. Automatic Self opening Momentary Intermittent

Momentary

What device is used before a motor that allows electricity to flow to the motor? Control relay Solenoid valve Motor starter Conductor

Motor starter

Which of the following logic elements describes two or more normally closed input switches in parallel? NAND NOT NOR AND

NAND

An electromechanical relay includes which of these components? Two sets of NO contacts, and a solenoid coil NO contacts, NC contacts, and a solenoid coil Two sets of NC contacts, and a solenoid coil NO and NC contacts and a ferrous element

NO contacts, NC contacts, and a solenoid coil

Which of the following elements describes two or more normally closed input switches in series? NOR NOT NAND OR

NOR

Which type of valve restricts flow in both directions? Pressure relief Flow control Needle None of the above

Needle

A flow control valve is a combination of a __________. Relief and DCV Check and a relief valve Needle valve and a check valve DCV and a needle valve

Needle valve and a check valve

Force is any attempt to change the motion of an object and is measured in __________. Newtons (N) and pound-force (lbf) Foot-pounds (flb) Pounds per square inch (psi) Pounds per square foot (psf)

Newtons (N) and pound-force (lbf)

A stop pushbutton is basically just a __________. Normally open pushbutton switch Normally closed pushbutton switch Panic switch All of the above

Normally closed pushbutton switch

Where there is no continuity found when testing with a DMM, the screen may display this. OL 0 VΩ Null

OL

A(n) __________ is used to measure resistance. Ohmmeter Ammeter Voltmeter Flow meter

Ohmmeter

Resistance is measured in units of __________. Volts Watts Ohms Amps

Ohms

NOT logic is formed by __________. Two normally closed input switches Two normally open input switches One normally open input switch One normally closed input switch

One normally closed input switch

Single-acting cylinders apply force in __________. Only one direction Two directions All directions Multiple directions

Only one direction

__________ may remove a lockout on the power source of a piece of mechanical equipment. Only the instructor Any two people Only the person who installed the lockout Any person familiar with the mechanical equipment

Only the person who installed the lockout

Which of the following is NOT an important step of regular maintenance? Keep fluid clean Operate at high temperatures Eliminate leaks Use correct pressure

Operate at high temperatures

Which type of device is the relay's solenoid coil in the control logic? Input Output Latching Memory

Output

Which of the following is a formula for calculating power? P = I × E P = I × R P = E / R All of the above None of the above

P = I × E

A hydraulic press shows what in action? Pascal's law Murphy's Law The Peter Principle The Law of Gravity

Pascal's law

Leaks in a fluid power system can cause two issues. The first is premature failure of the power sources due to overloading. What is the second issue? Dirty fluid Damage due to low pressure Personnel hazard System overheating

Personnel hazard

Both major categories of shaft bearings can be mounted in one of which two ways? Four bolt and two bolt. Pillow block and flange. Single assembly and split assembly. None of the above.

Pillow block and flange.

On which part of a hydraulic cylinder does the fluid exert its power? Rod Piston Port Body

Piston

What assembly moves inside the barrel-shaped body of a cylinder? Piston/Rod Poppet/Spring Element Vane

Piston/Rod

Pulley Ratio is defined as the ratio of __________. Outside diameter of the driven pulley to the outside diameter of the driver pulley Pitch diameter of the driven pulley to the pitch diameter of the driver pulley Pitch diameter of the driver pulley to the pitch diameter of the driven pulley Shaft diameter of the driver pulley to the shaft diameter of the driven pulley

Pitch diameter of the driven pulley to the pitch diameter of the driver pulley

Force can be measured in __________. Pressure Gravity Pounds Meters

Pounds

The rate at which electricity is converted into some other usable form like heat is called __________. Usage Power Dissipation Consumption

Power

Which of the following shows the connections for power devices? Ladder diagram Power diagram Wiring diagram Schematic diagram

Power diagram

What should you do when a high-pressure hose fails and begins leaking? Break for lunch Tell your coworkers Press the EMERGENCY STOP button Repair the problem yourself

Press the EMERGENCY STOP button

Increasing force in a Hydraulic system causes __________. Pressure to increase Area to increase Fluid volume to decrease Pressure to decrease

Pressure to increase

Safety goggles __________. Protect the eyes from flying debris coming from any direction Protect the eyes from ultraviolet light Should not be worn under the welding helmet Can be used instead of a welding helmet

Protect the eyes from flying debris coming from any direction

A(n) __________ provides power to a hydraulic system by pumping oil from a reservoir into the supply lines.. Air Relief Valve Pump Directional Control Valve

Pump

An example of a manually-operated single cycle reciprocation circuit is a __________. Drill Lathe Punch Press All of the above

Punch Press

What kind of fitting is used with hoses that require frequent connection and disconnection? Reducer Quick-connect Bushing Tee Elbow

Quick-connect

Which of the following is a formula for calculating total resistance in a parallel circuit? RT = ET × IT RT=R1+R2 + R3 RT = 1/(1/R1 + 1/R2 + 1/R3) All of the above None of the above

RT = 1/(1/R1 + 1/R2 + 1/R3)

The three types of loads placed on bearings are __________. Radial, coaxial, and transaxial Radial, thrust, and combination Radial, helical, and transverse Radial, reverse, and axial

Radial, thrust, and combination

Standoffs __________ the shaft and bearing assembly to the motor shaft. Lower Angle Raise Rotate

Raise

What is the main purpose of bearings? Change direction Decrease torque Increase speed Reduce friction

Reduce friction

In a chain drive system, the speed and torque of the driven shaft are determined by the __________. Relative number of teeth between the driven sprocket and the drive sprocket Ratio of the pitch circles between the driven sprocket and the driver sprocket Ratio of the chords between the driven sprocket and the driver sprocket Ratio of the diameters between the driven sprocket and the driver sprocket

Relative number of teeth between the driven sprocket and the drive sprocket

The flow of electricity to a solenoid is carried through __________ to protect other devices. Uninsulated wires Relay contacts Shielded cable A capacitor

Relay contacts

Devices called __________ often serve as the brains of an automated machine. Switches Latches Relays Power supplies

Relays

Most contaminants, such as dirt, dust, debris, and water, enter the Hydraulic system through the __________. Reservoir Valves Filters Dipsticks

Reservoir

A meter-in flow control valve controls the speed of an actuator by __________. Applying back pressure to the actuator Restricting the flow to the actuator Diverting flow to the reservoir Restricting the flow from the actuator

Restricting the flow to the actuator

The flange coupling is classified as which type of mechanical coupling? Rigid Flexible Universal Clutch

Rigid

The most common type of chain used for mechanical drive is a __________. Roller chain Rollerless chain Silent chain Leaf chain

Roller chain

Which of the following is NOT a cause of pressure problems? Damaged pumps Worn valves Worn components in the motor Room temperature

Room temperature

Which type of flowmeter must be oriented in a vertical position? Rotameter Turbin Piston Vane

Rotameter

A limit switch used to sense if the guard is in place on a machine is called a(n) __________. Idiot switch Safety interlock switch Kill switch All of the above

Safety interlock switch

A(n) __________ diagram uses symbols to represent electrical devices and how they are connected. Pictorial Isometric Scaled Schematic

Schematic

What type of symbols make it easier to design, analyze, and understand a Hydraulic circuit? Map Hieroglyphic Schematic Blueprint

Schematic

You must do what before storing an open fluid container? Empty it Seal it Shake it Heat it

Seal it

An example of memory logic by a control relay is __________. Bypass logic Manual override Seal-in circuit All of the above

Seal-in circuit

What should you do if you think you've received a pinhole leak injury? Seek medical attention immediately Put a bandage on it Ignore it Wash the area and go back to work

Seek medical attention immediately

A(n) __________ switch uses a rotary motion to open and close contacts. Automatic Pushbutton Selector Knife

Selector

What is one thing you should NOT do during operation of a Hydraulic system? Service the system Turn the system off Follow the operating manual Call your supervisor

Service the system

Which is the most basic type of limit switch? Single pole single throw Single pole double throw Single pole triple throw Single throw double pole

Single pole single throw

In a chain drive system, the speed of the driven shaft will decrease as the __________ increases. Drive torque Sprocket ratio (SR) Chain pitch Driver torque

Sprocket ratio (SR)

To read and interpret a basic hydraulic schematic, the user should __________. Start at the pump, then follow the fluid flow through the control valve to the actuator Start at the actuator, then follow the fluid flow to the pump and then to the control valve Start at the control valve and follow fluid flow to the pump and then to the actuator Start at the actuator nearest the control valve, then follow the fluid flow through the control valve to the second actuator

Start at the pump, then follow the fluid flow through the control valve to the actuator

What innovation allowed hydraulic technology to explode and be used in practical ways for the first time? Force pump Aqueduct Steam shovel High-pressure hose

Steam shovel

Air supplied to a pneumatic system is supplied through the __________ line. Intake Supply Actuator Exhaust port

Supply

Couplings are categorized as rigid or flexible. What determines the categories? The material of the connected component The material of the coupling The structure of the coupling The needs of the connected component

The needs of the connected component

Industry uses quick connect fittings when __________. Ever possible Low cost is desired The equipment is used at high altitudes There is a frequent need to connect and disconnect a pneumatic conductor

There is a frequent need to connect and disconnect a pneumatic conductor

Chrome-plated steel shafts should be used __________. To improve the beauty of the machine To resist rusting or corrosion On shafts exceeding six inches in diameter For flexibility

To resist rusting or corrosion

Multiple strand chains are used __________. For low power, intermittent running To run multiple shafts For silent running To transmit a great deal of power

To transmit a great deal of power

A smaller weight on a lever can raise a larger weight, but the smaller weight must move a greater distance. Is this statement TRUE or FALSE? True False

True

Before performing system maintenance, you should work the valves in all positions. Is this statement TRUE or FALSE? True False

True

Current is more dangerous to measure than voltage. Is this statement true or false? True False

True

Following a maintenance program is the most effective way to prolong system life. Is this statement TRUE or FALSE? True False

True

Hydraulic systems use oil rather than water because it's self-lubricating, has more viscosity, and doesn't lose energy. Is this statement TRUE or FALSE? True False

True

Hydraulic workholding leads to better productivity and accuracy when compared to manual workholding. Is this statement TRUE or FALSE? True False

True

If a high-pressure hose breaks, it can continue flailing even when the pump has stopped operating. Is this statement TRUE or FALSE? True False

True

It's a good idea to listen for unusual sounds from the system pump and report them to maintenance. Is this statement TRUE or FALSE? True False

True

Light from arc welding can cause severe burns to the eyes or blindness. True False

True

Limit switches are included on the power diagram. Is this statement true or false? True False

True

No matter how careful you are, normal operations will admit some contaminants into the Hydraulic system. Is this statement TRUE or FALSE? True False

True

Pascal's Law states that any change in pressure in an enclosed fluid is applied equally to all the fluid in the enclosure. Is this statement TRUE or FALSE? True False

True

The accumulator can hold pressure to operating levels even when the pump isn't running. Is this statement TRUE or FALSE? True False

True

The filter removes impurities from the oil to allow the Hydraulic system to work at maximum efficiency. Is this statement TRUE or FALSE? True False

True

The most important concern when working in any type of manufacturing is safety. Is this statement TRUE or FALSE? True False

True

Welding screens help to protect bystanders from accidentally looking at the welding arc, but do not always block harmful rays completely. True False

True

When using an angle grinder you should unplug the angle grinder while changing abrasives, hold the angle grinder firmly in two hands and wear eye protection. True False

True

OR logic is formed by __________. Two normally closed input switches in series Two normally open input switches in parallel Two normally closed input switches in parallel All of the above

Two normally open input switches in parallel

All electric motors require __________ bearings mounted ______ to the motor. Two; internally One; internally Two; externally One; externally

Two; internally

Often mechanical power is transmitted by a shaft. The shaft can be connected using three methods. Which method provides the ability to connect at an angle to the driving shaft? Universal joints Couplings Clutches Coaxial connectors

Universal joints

Which of the following is not a pneumatic safety rule? Avoid exposure to the pressurized air Use proper pressure when cleaning with air Use any container for compressed air. Use proper PPE

Use any container for compressed air.

An angle grinder __________. Uses a high torque, slow moving wheel or brush to remove imperfections from the base metal Uses friction to remove unwanted deposits and dirt from the weld area Should only be used to remove excess weld deposit after welding Does not create sparks while in operation

Uses friction to remove unwanted deposits and dirt from the weld area

The three basic components for a belt drive system are __________. Motor, pump, and V-belt Motor, pulley, and drive sheave V-belt, drive sheave, and driven sheave V-belt, shaft, and pulley

V-belt, drive sheave, and driven sheave

Which of the following is not a component of a ladder diagram? Input device Output device Conductor Valve

Valve

The control devices used in pneumatics are called __________. Compressors Actuators Valves Conductors

Valves

The unit of measurement for voltage is the __________. Ohm Amp Watt Volt

Volt

The potential difference between two points in a circuit is called __________. Current Voltage Resistance None of the above

Voltage

__________ is the amount of force exerted to move electrons. Current Voltage Resistance Power

Voltage

What is the preferred unit of measure for power? Horsepower BTU Watt Amps

Watts

What types of areas on cylinders and valves indicate leaks? Dry and clean areas Wet or dirty areas Pinched areas Hot areas

Wet or dirty areas

The most basic way to test the tension of a belt is to use __________. A tension tester A spring scale and straight edge Your sense of touch Increase belt span

Your sense of touch

How long should you wait for the Hydraulic system to cool down after operation? 10 minutes 30 minutes 45 minutes 1 hour or more

1 hour or more

One ton-force is equal to __________ pound-force. 100 200 1000 2000

2000

What is the reading on the pressure gauge? 300psi 320psi 330psi 350psi

320psi

Which valve often has plugged ports to create a 2/2 way valve? 3/4 way valve 3/3 way valve 4/2 way valve 4/3 way valve

4/2 way valve

If AC power cycles back and forth 50 times per second, what is its frequency? 30 Hz 40 Hz 50 Hz 60 Hz

50 Hz

One revolution per second is equal to __________. 1 RPM 1000 RPM 60 RPM 6 RPM

60 RPM

When using a chain puller, the jaws are opened and closed by __________. A dial on top of the tool By hand A jaw inserted into the chain Using a torque wrench

A dial on top of the tool

The schematic symbol for a flow line (hose) is __________. An upside-down triangle The letter "E" lying flat A diamond shape with a dotted line through it A straight horizontal line

A straight horizontal line

This component stores energy in the form of pressurized gas. Accumulator Actuator Pump Reservoir

Accumulator

A meter-out flow control circuit __________. Is used to control aiding loads Builds back pressure at the actuator Is used to control opposing loads All of the above

All of the above

Output devices transfer electrical energy to what other kind of energy? Light Sound Movement All of the above None of the above

All of the above

Which of the following statements describes a limit switch? It is a switch used to sense the position of a machine arm. It is a simple, low in cost, reliable device. It is one of the most frequently-used input devices on automatic machines. All of the above.

All of the above.

The purpose for having a clutch connecting two shafts together is to __________. Allow the two shafts to be disconnected while running Multiply the torque of the drive shaft Allow for easier assembly and disassembly of the drive system Change the direction of rotation

Allow the two shafts to be disconnected while running

__________ current is more efficient to transport over long distances. Alternating Absolute Direct Inverse

Alternating

One method of deenergizing a seal-in circuit is to use __________. A manual override Another relay A solenoid An input with NC contacts

An input with NC contacts

The two major types of misalignment corrected by shaft alignment are __________. Line of sight and vibration Angular and parallel Angular and vibration Parallel and line of sight

Angular and parallel

The procedure for aligning two shafts is to check and correct __________ and __________ misalignment in two planes: vertical and horizontal. Side view; top view Coupling gap; space Angular; parallel Top; bottom

Angular; parallel

What must be added to a single-cycle reciprocation control circuit to make it repeat its cycle continuously? Another start pushbutton Another cylinder Another limit switch Another DCV

Another limit switch

What is another name for ball bearings? Sliding contact bearings Solid bearings Frictionless bearings Antifriction bearings

Antifriction bearings

A mechanical power transmission system receives power from the __________. Driven device Driver Prime Mover B and C

B and C

You should check for correct fluid levels __________. Once a year Whenever you have time Before using the system When told by your supervisor

Before using the system

The three types of shaft-to-adjacent-shaft power transmission are __________. Belt drive, clutch, and gear drive Clutch, direct coupling, and gear drive Belt drive, chain drive, and gear drive Flexible coupling, direct coupling, and sleeve coupling

Belt drive, chain drive, and gear drive

Which type of machine removes material from a workpiece by pushing or pulling a tool with teeth through the material? Stamping machine Forging machine Broaching machine Workholding station

Broaching machine

Checking the oil cooler and the heat exchanger to see if they're working means that you're looking for what type of problem? Low fluid Low pressure Pump failure Burning smells

Burning smells

Mechanical power transmission can be transmitted by connecting two parallel shafts. Which parallel shaft power transmission provides distance from the two shafts and the most torque? Belt drive Chain drive Gear drive Universal drive

Chain drive

Which of the following does not describe a potential sprocket misalignment condition? Angular Sprocket Chain sag Parallel

Chain sag

Pneumatic quick connect female fittings contain a(n) __________ to keep air from leaking when disconnected. Check valve Pressure regulator Ball valve Gate valve Elbow Tee Male connector Plug

Check valve

Which schematic symbol depicts energy conversion devices, such as an air motor, in a pneumatic schematic? Circle Oval Square Diamond

Circle

Hydraulic fluid exerts pressure on the __________. Piston Operator Conductor Cylinder

Conductor

Fully automated machines require a __________. Single-cycle cylinder circuit Stop circuit Continuous-cycle reciprocation circuit All of the above

Continuous-cycle reciprocation circuit

The main function of a needle valve is to __________. Control pressure Control the speed of an actuator Turn off the flow Reduce pressure spikes

Control the speed of an actuator

Before working or performing maintenance on any Hydraulic system, first allow the system to do what? Warm up Cool completely Run for several hours Never perform maintenance on the system

Cool completely

An ammeter is used to measure __________. Current Resistance Voltage Temperature

Current

What pneumatic component provides straight line motion? Motor DCV Cylinder Muffler

Cylinder

What device provides the means by which electrical circuits control pneumatic or hydraulic systems? Relay Motor DCV Pushbutton

DCV

__________ current flows in only one direction. Alternating Absolute Direct Inverse

Direct

DCV stands for __________. Digital control variable Dynamic cost variable Directional Control Valve Directional control vane

Directional Control Valve

Ohm's Law for calculating voltage is __________. E = I × R E = P × R E = P × I × R All of the above None of the above

E = I × R

What type of drawing is a ladder diagram? Pictorial diagram Electrical schematic Rung diagram Power diagram

Electrical schematic

The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the base metal being welded. Electricity Oxygen Acetylene Tungsten

Electricity

When the operator squeezes the trigger on a GMAW welding gun __________. Electricity, shielding gas, and cooling water meet at the nozzle Electricity, shielding gas, and wire meet at the contact tip Oxygen and acetylene mixes and is delivered to the contact tip The filler rod is heated and melted with the base metal

Electricity, shielding gas, and wire meet at the contact tip

Smaller dirt particles are removed from the air by the filter's __________. Deflector Baffle Element Bowl

Element

An independent speed control circuit may be needed with a double-acting cylinder because __________. Aiding loads are present Equal extend and retract speeds are needed Two speeds are needed during extend Two different pressures are needed

Equal extend and retract speeds are needed

C-Clamps are not used in welding because they are difficult to use. True False

False

When dexterity is of extreme importance __________ gloves should be worn. Mitten type welding Regular mechanics Five finger welding No

Five finger welding

A __________ bearing is a housing with mounting feet that are oriented in a manner that allows the bearing to be mounted to a surface perpendicular to the shaft. Pillow Solid Roller Flange

Flange

A pump produces __________. Pressure Flow Flow and pressure Pressure drop

Flow

What is the amount of fluid moving from the pump called? Flow Pressure Resistance Energy

Flow

The Hydraulic system pulls this component from the reservoir. Electricity Fluid Coolant Contaminants

Fluid

Weight is measured in pound-force (lbf) or newtons (N). Weight is the __________ an object is pulled by gravity. Load Strength Force Pressure

Force

What is pressure? The weight of an object Force acting on a given area The area of a pair of snowshoes Gravity

Force acting on a given area

What is pressure? Weight of an object Force acting on a given area The area of a pair of snowshoes Gravity

Force acting on a given area

Which term is defined by the total operating current of a circuit? Full Current Full Amperage Full Load Amperage Load Amperage

Full Load Amperage

Which of the following is a type of circuit protection device? Fuse Resistor Rheostat Capacitor

Fuse

A pneumatic system uses a(n) __________ to provide power. Solid Gas Liquid Electric current

Gas

Mechanical power transmission can be transmitted by connecting two parallel shafts. Which parallel shaft power transmission provides a directional change of the rotary motion? Belt drive Chain drive Gear drive Universal drive

Gear drive

While this point is critical for circuit safety, it also makes a convenient common reference point for point voltage measurements. Ground Zero Reference Negative Positive

Ground

If a wire has continuity, it __________. Cannot conduct current Has a complete path for current to flow Cannot be used in a circuit Has a short

Has a complete path for current to flow

A V-belt should ride __________ in the groove with its top near the top of the sheave, and does not touch the __________ of the sheave. High; bottom Low; bottom High; top Low; sides

High; bottom

The force on a spring can be found by measuring the distance the spring changes from its original length, according to __________. Hooke's Law Hooke's Constant Hooke's Spring Rate Hooke's Measure

Hooke's Law

Higher holding power and rigidity, faster cutting tool changes, and greater accuracy are the advantages of __________. Forging Broaching Hydraulic tool holding Traditional workholding

Hydraulic tool holding

What portion of Ohm's law can replace the variable E in the power law? I/R I × R E/R E × R

I × R

The schematic symbol for a basic hydraulic component __________. Is the same as the picture of that component Is the same as the outline of that component Is a standard symbol for the function of that component Is the same symbol for each component in a single schematic

Is a standard symbol for the function of that component

Compared to a V-belt drive, a chain drive __________. Requires more tension Is more efficient Is less efficient Needs less lubrication

Is more efficient

Oxyacetylene welding __________. Is not affected by wind Can only be performed using acetylene and oxygen Is commonly used to weld thin sheet metal Requires electricity to melt the metal

Is not affected by wind

Which of the following is a characteristic of welding? Used to make temporary joints between metal Weaker joining method than bolting or riveting Is often used in manufacturing Occurs when two pieces of metal are joined together using bolts

Is often used in manufacturing

Gas Tungsten Arc Welding __________. Is the fastest type of welding, used primarily in manufacturing settings Is very precise, used on thinner metals where precision and accuracy are important Utilizes a wire electrode as filler metal Is sometimes referred to as "MIG" welding

Is very precise, used on thinner metals where precision and accuracy are important

Which of the following statements is not true of a ladder diagram? It arranges wires in orderly rows. It can have more than one output device on each rung. It can have more than one input device on each rung. It shows input devices on the left side.

It can have more than one output device on each rung.

Potential energy is stored energy until it is allowed to move, then it becomes __________. Elastic energy Emotional energy Static energy Kinetic energy

Kinetic energy

A used belt requires __________ belt deflection force than a new belt.. Slightly more Less 50% more The same

Less

A solenoid is an output device that moves in a(n) __________ motion when current is applied. Rotary Linear Elliptical Oscillatory

Linear

Which of the following is not shown in a hydraulic schematic? Liquid Pump Actuator Relief Valve Pressure gauge

Liquid

Always report any problems you find to __________. Your supervisor Maintenance Your coworkers Research and development

Maintenance

Which of the following statements does not accurately describe a part of the process of measuring the resistance of a component that is connected in a circuit? Turn off the power supply. Disconnect one of the component leads from the circuit. Make sure the power supply is on. Connect the leads across the component.

Make sure the power supply is on.

Mass is the amount of __________ the object contains. Matter Force Weight Gravity

Matter

The rate machines perform work is defined as __________. Mechanical pressure Mechanical power Mechanical load Mechanical force

Mechanical power

A motor control circuit is a common application of what type of logic element? NAND NOR NOT Memory

Memory

Which type of logic element uses a control relay? NAND NOR NOT Memory

Memory

The machine that uses highly accurate dies and punches to cut metal alloy sheets into shape is the __________. Forging machine Broaching machine Workholding station Metal stamping machine

Metal stamping machine

A(n) __________ switch is not a manually operated switch. Pushbutton Selector Knife None of the above

None of the above

Which is not an application of Ohm's Law? Troubleshooting circuits Sizing components Creating multiple voltage levels All of the above None of the above

None of the above

Which type of circuit breaker trips immediately when needed under all circumstances? Magnetic Thermal Both of the above None of the above

None of the above

Which of the following is not a component of a limit switch? Actuating mechanism Optical sensor Contacts All of the above

Optical sensor

What devices are wired to the relay circuit and are turned on in sequence to create the steps of operation? Input Output Memory Automatic

Output

The device most often used to orient a surface so it is either parallel or perpendicular to the ground is a __________. Measuring tape Spirit level Plum bob Laser alignment device

Spirit level

What component of a relay positions the contacts into their normal state when the solenoid is de-energized? Coil Contacts Armature Spring

Spring

The 3-position, 5-way DCV is held in the middle-position by the __________. Operator Spool Body Springs

Springs

Chain sag is measured by rotating the sprockets so there is little or no chain sag in the __________ side and measuring the sag in the __________ side. Motor; sprocket Vertical; horizontal Taut; slack Driver sprocket; driven sprocket

Taut; slack

This type of fitting connects two branch circuits to a single supply line. Elbow Tee Male connector Plug

Tee

The grade of a bolt can be determined by __________. Measuring the bolt diameter Measuring the bolt length and diameter Counting its threads per inch The marking on the head of the bolt

The marking on the head of the bolt

Flow rate is equal to volume divided by __________. Pressure Time Gallons Area

Time

Which of the following is not a component of a relay? Coil Contacts Valve Spring

Valve

The adjustable motor mount is used __________. When it is routinely necessary to change the tension on a belt or chain drive To vary the motor speed When it is necessary to change the size of the motor To compensate for wear on the motor bearings

When it is routinely necessary to change the tension on a belt or chain drive

One important characteristic of a timing belt is that it __________. Requires more tension than a v-belt Will not slip during operation Makes more noise than a flat belt Is easier to replace than a v-belt

Will not slip during operation

The best way to check for a pinhole leak is __________. With your hand With your arm With a piece of wood or cardboard To examine the hose

With a piece of wood or cardboard

Moving an object from one point to another is called __________. Load Force Mass Work

Work

Belt span is defined as the __________. Sum of the pitch diameters of the driven sheave and the driver sheave Distance between the centers of the driven sheave and the driver sheave Width of the belt Distance between the points on the sheaves where the belt touches each sheave

Distance between the points on the sheaves where the belt touches each sheave

To measure motor RPM, the rubber-tipped shaft on a handheld tachometer must be held against the __________. End of the spinning motor shaft Base or motor foot Power cord while the motor is running Motor shaft, but only when the motor is stopped

End of the spinning motor shaft

The two major categories of bearings used in industry are __________. Ball and roller Ball and journal Plain and anti-friction Friction and anti-friction

Plain and anti-friction

A soft foot condition on a motor mount should be corrected by __________. Shimming one foot only Shimming all four feet Ending the soft foot on the motor base Shimming two diagonally opposite feet

Shimming one foot only

The maximum allowable deflection force on a belt is __________ than the minimum deflection force. 5% greater 50% less 50% greater 100% greater

50% greater

A machine foundation should be designed to support the load of the machine, maintain the alignment between coupled components, and __________. Be easily moved Be lightweight Blend with the other foundations Absorb any vibration created by the machine

Absorb any vibration created by the machine

Pitch is defined as the distance between a point and a similar corresponding point. Examples of pitch are __________. Chains Threads Gears All of the above

All of the above

Without bearings to hold a shaft in place, loads would cause __________. Excessive wear The shaft to move out of place The machine to fail All of the above

All of the above

The advantage of the flexible jaw coupling is __________. Less expensive Allows more misalignment Dissipates heat better Holds shaft together better

Allows more misalignment

The diameter of the accuracy stock shaft is __________ the nominal diameter, due to its precision grinding. Always greater than Usually greater than Always equal to Always less than

Always less than

Current is measured in __________. Amps Volts Ohms Pascals

Amps

A(n) __________ electrical circuit provides a path for current to flow between the positive and negative terminals of a power supply. Open Closed Incomplete Series

Closed

__________ is the rate of flow of electrons. Current Voltage Resistance Power

Current

In a belt drive system, as the pulley ratio increases, shaft speed on the driven pulley will __________ and shaft torque will __________. Increase; increase Decrease; remain the same Increase; decrease Decrease; increase

Decrease; increase

An industrial machine foundation usually consists of __________. Asphalt Wooden beams Solid concrete Existing floor material

Solid concrete

Kirchhoff's Voltage Law for a series circuit says that the total voltage is equal to the __________. Smallest voltage drop Sum of the voltage drops Product of the voltage drops Largest voltage drop

Sum of the voltage drops

When aligning two shafts, the reason to rotate the coupling hubs before making each measurement is so that a measurement is __________. Taken from a different place each time Taken from the same place on the hub each time Taken at 45 degree increments around the entire hub None of the above

Taken from the same place on the hub each time

The pitch circle of a belt drive is __________. The outer edge of the hub The bottom of the sheave groove The place in the belt which represents the center of the force that is being transmitted by the belt Located somewhere outside the outer diameter of the sheave

The place in the belt which represents the center of the force that is being transmitted by the belt

The function of a machine shaft is to __________. Act as a spacer between a motor and a driven shaft Support the weight of a motor Transmit mechanical power from one location to another Act as a heat sink to counteract motor overheating

Transmit mechanical power from one location to another

When using an angle grinder, the operator should not set the grinder down while the disc or brush is still moving. True False

True

The most common fastener used to attach a motor to a bedplate is a hex head bolt with __________. A lock washer and a nut A flat washer, a lock washer, and a nut Two flat washers, a lock washer, and a nut Two flat washers, two lock washers, and a nut

Two flat washers, a lock washer, and a nut

Spot Welding __________. Is the same thing as "tack welding." Uses electrical resistance and pressure to weld metal Does not require electricity Is rarely used in manufacturing

Uses electrical resistance and pressure to weld metal

A multimeter is a multipurpose device that can measure __________. Only voltage and resistance Only voltage and current Only resistance and current Voltage, current, and resistance

Voltage, current, and resistance

A(n) __________ is a measurement device used to measure voltage. Ohmmeter Multimeter Voltmeter Ammeter

Voltmeter

In the process of installing a V-belt drive system, the motor and driven component should be checked for a soft foot condition and excessive run-out. The shaft run-out should be no more than __________. 0.07 inch 0.007 inch 0.002 inch 0.02 inch

0.002 inch

The sprocket ratio for a chain drive system having a driven sprocket with 54 teeth and a driver sprocket with 18 teeth is __________. 0.333 72 33 3

3

A chain should be replaced when its length becomes __________ longer than the original length. 1 inch 3 inches 3% 10%

3%

To install a chain, in some applications __________. The driver shaft is moved The driven shaft is moved A master link is used All of the above

A master link is used

A common material used in machine shafts is __________. Cold rolled steel Copper Pewter Iron

Cold rolled steel

Shielded Metal Arc welding uses __________ to protect the weld area from contaminants. Oxygen gas Argon Flux Carbon dioxide

Flux

A Fractional Horsepower (FHP) V-Belt is used for __________. Low power, intermittent operation Constant running installations Conveyors Applications exceeding 100 Hp

Low power, intermittent operation

__________ switches are operated by humans to control power flow to outputs. Manual Automatic Pneumatic Limit

Manual

A __________ circuit is one in which there is only one path for current to travel. Complex Series Parallel Closed

Series

A bedplate is a solid piece of metal usually made of __________. Copper Steel Brass Cast iron

Steel

In a chain drive system, the __________ on the driven shaft will increase as the sprocket ratio (SR) increases. Torque Speed Chain pitch Chord pitch

Torque

The coupling provides a secure method of transmitting __________ from one shaft to another. Torque and thrust Heat Torque and speed Distance

Torque and speed

Some rules for safe dress to wear around machinery when it is running are __________. Wear safety glasses and gloves at all times Wear tight fitting clothing and heavy duty shoes Wear bright colored clothing Wear light weight, loose fitting clothing

Wear tight fitting clothing and heavy duty shoes


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