Maintenance Awareness test
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
