General Maintenance

A hole is drilled in a part. How can the dimensions in the hole be indicated most conveniently on a drawing of the part?

???

Flux is _____?

A cleaning substance to be used when soldering.

Brazed cast fittings should be cooled with _____?

A damp cloth

Eye protection for in welding electric arc welding and cutting operation is provided by _____?

A filtered lens and a helmet.

The most important component in a sprinkler system is?

A reliable source of water, sufficient volume of water and sufficient water pressure.

Basic purpose of a water trap is _____?

Act as a water seal preventing odors and gases from entering

Which of the following types of load make the most significant contribution to sliding friction between two machined surfaces?

Adhesion

Electric arc welding and welding heat is produced by the passage of heavy electrical current through a resistance of an _____?

Air gap

*One of the most positive means of preventing back siphonage is the proper use of an ____?

Air gap/siphon break

If the seal has just been replaced and if the pump leaks slightly at start up, first?

Allow the pump to continue to run for a short period of time and see if the leak stops.

The strength of the trap seal can be increased by installing _____ without violating the plumbing code?

An extra deep trap (no more than 4" deep)

In the event of a conflict between working drawings and job specifications, the _____.

Architect or senior engineer would issue a binding decision

When stopping a centrifugal pump with no check valve, it is good engineering practice to _____?

Close the discharge valve first

To make a weld that is sound, the edge of the piece of the weld must be _____?

Cleaned

Before a 2nd bead is laid over a just completed bead of arc welding, the weld must be _____?

Cleaned and removed of all slag

An electrode that contributes globules of molten metal into metal as a filler material is called a _____?

Consumable electrode

In single type silicone greases can function in what temperature ranges in degrees Fahrenheit?

-20 to 450

An orthographic view shows only sides or faces of an object?

1

One kilowatt = _____?

1,000 watts

One plan scale is 1/8 in. = 1 foot. 2 ½ in. on a ruler on the scale would equal how many feet?

20 feet

Threaded pipe is usually available in lengths of _____.

21 feet

16th bend in the direction of a pipe is _____.

22 ½ degrees

A welding defect consisting of a void or cavity produced by gases trapped in a solidified hot metal is called a _____?

Blow hole

Type L copper tubing is color coded _____?

Blue

What type of packing should be selected for low-pressure steam conditions where softness and lubrication are desirable characteristics?

Braided

*What percentage of building water is used for landscaping?

30 percent (Rob not sure)

A horsepower is equal to _____?

33,000 foot pounds of work per minute

On a site development plan, a plan drawn to a scale of 1 in. equals 10 feet. A 40 foot by 80 foot building would be drawn as a _____?

4 in. x 8 in.

An 1/8 bend changes direction of a pipe _____?

45 degrees

*Which of the following approaches is use for water conservation in landscaping?

Bubblers, drip irrigation and sizing water pipe

The pipe that connects the base of the stack of a sanitary sewer to the public sewer is a _____?

Building drain

Force necessary to cause a gasket to flow into surface imperfections is known as _____.

C-force

A foot valve may sometimes be used on a submerged end of the suction side of the centrifugal pump to keep the pump primed.

True

Capacity of an air compressor is usually expressed in cubic feet per minute?

True

Class "A" fires are those of combustible materials such as wood, paper, cloth. Where cooling, soaking or cloaking the burning materials essential?

True

Class "C" fire are those involving energized electrical equipment where non-conductive or extinguishing agents are essential?

True

In a fire sprinkler system there two main types of sprinkler heads, upright and pendant?

True

One of the first signs of a failing bearing is a rise in temperature increase in sound.

True

Parallel alignment is where a center line and two shafts are in parallel.

True

Plastic pipe has a tensile strength rated to the nearest 100 pounds?

True

Plug valves go from a fully open position to a fully closed position in a quarter turn of the handle.

True

Smoke detection is accomplished by either photoelectric scanning, ionization, chambers, and smoke detection devices?

True

Standard grade, pitch, fall or slope in a horizontal drain system should not exceed ¼ inch per foot.

True

The basic purpose of a plumbing fixture trap is to act as a water seal and prevent odors and gases from within the pipe to enter a living space.

True

The basin wrench is used primarily for the removal of the small nuts and piping pieces from the underside of sinks and lavatories.

True

The schedule 40 DWB and PVC pipe is the same as cast iron DWB.

True

The volume of waste entering a grease trap is limited by the flow control fitting.

True

There are several methods used to detection of incipid fires, temperature sensing and smoke detections are the primary one?

True

When installing a P-trap in a vertical distance from a fixture, the crown weir (the depth that comes into the trap itself) may not exceed 24 inches.

True

When joining two lengths of pipe, you need to have two pipe wrenches with the jaws locked in opposite direction.

True

When starting a centrifugal pump, you should open the suction valve, start the pump and then open the discharge valve very slowly.

True

When using a hacksaw, you should always release pressure on the backstroke to allow for the teeth to clear.

True

When using a hacksaw, you should always use steady strokes but not fast enough to overheat the blade and cause possible blade damage.

True

When welding galvanized metals in a confined space, it is vital to make sure the area is well ventilated.

True

Of the service demands of lubricating oils, which of the following is the most precise in critical requirements?

Turbine oil

When joining two length of pipe, you need _____?

Two pipe wrenches with jaws locked in different direction.

*How great a variation from the recommended shade is allowable in a given welding or cutting operation?

Two shades darker or lighter/Two shades lighter one shade darker

Which of the following is not a trap?

U-trap

*The filter lenses are required for eye protection in welding and cutting operation and are designed to safeguard the eyes from injuries from what types of rays?

Ultraviolet/infrared and visible

Galvanized pipe is dip in _____ to protect its surface from abrasive and corrosive materials?

Zinc

Moving an electrode too slowly in a metallic arc-welding, results in _____.

a bead that is too high (welds)

Gate valves are _____ and _____.

available in quick opening models; have less pressure drop than other kinds of valve.

The total drop or fall permitted in a horizontal pipe from the outlet of a trap is _____?

equal to the diameter of the pipe

*Emergency power systems must supply power when local power fails to _____.

exit lights and stairs lights (Rob isn't sure)

Which of the following alarms will start diesel fire pump?

flow alarms

The volume of waste entering a grease trap is limited by _____?

flow control fitting

Power =?

force times distance divided by time

Continual problems with belt turning over are likely to be caused by _____.

improper installation techniques

If a coupling is not properly aligned _____ and _____.

it most certainly would fail more quickly than it should; it could wear out other components connected to it

When ordering fitting, the letters are used to designate the _____.

kind of fitting

Most arc welding employs consumable metal/metallic electrodes, the electrodes should be _____?

of the same type metal as the base metal

Sprinkler heads that are mounted in an inverted position is called a?

pendant, conventional, flush pendant.

Temporary platforms used by to support workers and materials while working off the ground is usually called a _____?

scaffolding

The coating on a metallic electrode prevents formation of slag because it _____.

stabilizes the arc and controls oxidation.

A _____ is a direct or indirect connection which may permit waste or sewage or either non potable water to flow into a potable water source or supply.

Cross connection

When installing a P-trap, the vertical distance from the fixture to the _____ (the depth that comes into the trap itself), may not exceed 24 inches?

Crown weir

A valve inserted in the water line between the corporation/corporate stop and the water meter is generally called a space____?

Curb cock

Which procedure is correct for flare joints?

Cut, ream, install flare nut and flare

Brazed joints are required when copper is used for _____ and _____?

Fuel lines and chemical lines.

What are disadvantages in using water for fire suppression?

Damages contents, conducts electricity & floats on oil.

Hub and spicket pipe is identified by _____?

Diameter, pipe weight and pipe length

Pipe and tubing is measured in _____ ways.

Different

Pipes and tubing are _____, when regarding to copper.

Different (tubing is measure by O.D. and pipe is measure by I.D.)

Toxic waste may be _____ or _____ before being discharge into the drainage system?

Diluted/neutralized

Of the following, the most is the critical factor regarding the suction lift of a pump handling water?

Distance

One disadvantage of pictorial drawings is generally they _____?

Do not accurately represent the object.

*Oil interceptors differ from grease interceptor in two important ways, principal differences are the _____ and _____.

Draw off system / requirement for vents (Rob not sure)

The scale of a drawing is a ratio of _____?

Drawing dimensions to object dimensions

A common pipe dope can be used on plastic pipe threads?

False

A toilet auger is a device to remove toilets from their foundations?

False

Class "A" fires are those flammable liquids, gases and greases which blanketing, smothering or extinguishing agents are essential or flame interrupting affect is needed.?

False

Globe valves should be used for whatever you have the need for full flow.

False

Power tools are okay to use with frayed cords as long as it is an engineer that is using them.

False

Rigid pipe is usually available in lengths of 10 or 25 feet?

False

Safety shields and goggles are not required to be worn if you wear glasses?

False

Schedule 80 is equal to extra heavy cast iron pipe and wall thickness?

False

Slip joint pliers or channel lock pliers as they are commonly known are an acceptable tool to use upon chrome fixtures.

False

When using a grinder it is perfectly acceptable to grind aluminum.

False

A weld used to fill a corner as in a lap joint or a T-joint is called a _____?

Fillet weld

The device such as a sink lavatory, toilet or shower stall is called a _____.

Fixture

Electrical tools should not be operated when either the tool or the operator is in contact with _____?

Flammable gases and water

To protect the pump or motor against slight misalignment, they often are corrected by the use of a _____.

Flexible cuffling

Which of the following alarms start the fire pumps?

Flow alarms

Work equals?

Force times distance

Work is _____?

Force x distance

Structural drawings are drawings of the building's _____?

Framework, floors, foundation & roof.

The class of standpipe system is determined by?

GPM capacity, hose connection size and personnel who uses it

Type K copper tubing is color coded_____.

Green

What type of filter would be required when working in an area that demand filters with efficiencies of 99%?

HEPA filter

What is domestic water subjected to when it is taken from streams, rivers, lakes and ponds?

Hardness increases

*Needle valves are_____?

Have a relatively small pressure drop/Are designed for throttling applications/are designed for throttling processes (Rob not sure)

To make a weld that is sound and dependable, the edges and the pieces of the metal must be thoroughly cleaned and correctly shaped so that good fusion will occur with the least possible _____?

Heat

What type of smoke detector acts like a fusible link in the sprinkler head?

Heat actuated detector

In some instances when installing the cone of a tapered roller bearing on a shaft, it becomes necessary to chill the shaft and heat the bearing. How is the latter operation accomplish?

Heat it to 250°F in hot oil

Consumable metal/metallic electrodes used in AC arc-welding are usually of what type?

Heavy coated.

Branch fittings are identified as right or left by _____?

Holding the inlet to you/outlet down then determine left or right.

A device used to measure battery acid strength is a _____?

Hydrometer

Usually if a motor in a system feels hot and you think it is overloading you should not open the flow valve further because?

Increase in flow will usually increase the horsepower requirements.

As the welding current is increased, the voltage must be _____.

Increased

Regulator gauges are to _____.

Indicate tank pressure and indicate gas pressure to the torch.

Solder joints can be used when connecting _____.

Industrial water lines

The relationship of a three element grease interceptor (grease trap) is critical. The elevation of the _____ and _____ in relationship to the static water line?

Inlet/outlet

Nominal measure refers to the size of the pipe's _____?

Inside Diameter

If a new single sheave V-belt squeals while the motor is running, you should _____.

Inspect the sheave for wear.

The long round pin on the electrical plug?

Is a safety ground

A long pin on a 115-volt electrical plug _____?

Is a safety ground and should never be removed.

The simplest pump and the least expensive is the _____.

Jet

What is the advantage of soft copper tubing?

Length available

There are three types of lubrication.

Liquid, solid and semi-solid

The best way to determine whether an arc is the right length is to _____?

Listen to the arc

Which of the following is a little consequence for selecting the correct packing for a particular surface?

Location of the equipment to which it will be installed

Gloves for use in welding should have _____?

Long cuffs.

A light oil has _____?

Low viscosity index

Why must care be taken in keeping lubricants clean?

Lubricants can be contaminated in storage have to be disposed of

After a coupling is aligned, we should recheck it after two weeks to _____.

Make sure it's still in alignment when the unit is up and at operating temperature.

To check sheave wear to see if the belt bottom out in the _____.

Measure each groove angle

*How do you change pressure from PSI to feet of water?

Multiply by 2.31

Screens or shields should be used in a welding operation to protect _____?

Nearby workers

Recommended flame for brazing is _____?

Neutral

Under CAL-OSHA Act, one of your rights is _____?

Not to work on or in any environment that you believe presents a health safety hazard.

Oxygen under pressure should never be allowed to come in contact with _____?

Oil

How important is alignment in belt driven equipment?

One of the most important; the most frequent cause of short belt life

When starting a centrifugal pump that is part of a manifold with no check valves, _____.

Open the suction valve, start the pump, then open the discharge valve slowly

Before striking an arc, the welder must make sure that _____?

Other in the area are warned to protect their eyes.

At what height is another engineer required as a ladder holder?

Over 6 feet.

What is a principal use for smoke detection?

Particle sensitivity

When working with electricity it is _____?

Perfectly safe to use a wooden ladder & perfectly safe to use a fiberglass ladder.

On severing the length of a 2 inch pipe it is preferably to use a_____.

Pipe cutter

The term straight polarity in arc welding means that welding circuit is arranged so that the polarity of the electrode is _____.

Positive to negative

Connection between a given building fire protection system and the public water supply are controlled by?

Post indicating valves

What's the best term that describes water use for drinking and cooking?

Potable

What can over tightening of the belt cause?

Premature bearing failure and premature belt failure

In the flow of water from the centrifugal pump should be stop by closing the discharge valve with the pump still running, the _____?

Pressure will increase rapidly

What direct benefit is obtained from keeping operating equipment and surrounding areas clean and painted?

Pride and safe environment

A foot valve may sometimes be used on the submerged end of the suction side of a centrifugal pump are used to reduced load at starting?

Prime kept

A major cause of vibration in pumps is _____ and _____.

Pump and motor alignment.

Water fire suppression systems require _____ and _____.

Pumps and storage tanks

Which of the following devices permits activation sprinklers during rainfall?

Rain sensor

*Needle valves are _____?

Similar in design to globe valves (Rob doesn't agree with any answers)

The true shapes of objects cannot be visualized from a _____?

Single orthographic view

Which of the following is the least likely cause of rapid wear of packing in a pump?

Slight leakage from the stuffing box

Which of the following would not be the cause of a centrifugal pump failing to deliver water?

Slight leakage of packing

The impeller keeps the fluid _____.

Slings the fluid to be outside

Variable pitch sheaves may be used in some cases to provide which of the following types of speed changes?

Small

In broad terms, greases are compounded from internal oils and what additives?

Soap

*What desired quality should make up water be used for in the heating and cooling process?

Soft and neutral (Rob not sure)

What desired quality should make up water be used for in a steam heating process?

Soft, treated & neutral

A pipe which is used to carry away human waste is called a _____?

Soil pipe

Roller chain connecting pins may be held by which of the following?

Spring clips, cotter pins and riveting

The coating on a metallic electrode _____.

Stabilizes the arc and controls oxidation

Which of the following best describes the basic types of sprinkler systems in a building?

Standard wet system, standard dry system and deluge system.

Black iron pipe is often used for _____?

Steam heating, gas and air pressure piping & hot water heating

What type of wrench should be used to hold or turn chrome pipes?

Strap wrench

When attempting to locate a gas leak the sense of _____ is usually not used.

Taste

Net positive suction head is?

The amount of absolute pressure actually available at the suction inlet of the pump to force the liquid up the pump.

For electrodes of up to 3/16ths the length of the arc should be kept to approximately _____?

The diameter of the electrode

For electrodes over 3/16ths in diameter the length of the arc should be kept at approximately _____?

The diameter of the electrodes/3/16th (the distance of the diameter)

The relationship of a three element grease interceptor (grease trap) are critical, what are they?

The elevation of the inlet and the elevation of the outlet in relationship to the standing water line.

What's the major advantage of soft copper tubing over hard drawn copper tubing?

The lengths available

Which of the following is of little consequence when selecting the correct packing for particular service?

The location of the equipment is to be installed

The number of sprinkler that can be placed on a given pipe is governed by?

The pipe size

A scale of a working drawing can be determined by _____?

The scale would be indicated on the drawing.

Torches should be inspected for leakage at _____.

The tip, valves, and hose connections.

If the current increases in an arc welding operation _____.

The voltage must be increased.

What happens to a lubricating oil when moisture contaminates it?

The water combines with the carbon content of the oil and starts to form acid when in turn attacks the metal surfaces.

*A38 and AX38 belts should not be mixed on a drive design to use AX38 belts because?

They require different sheaves for their use (Rob not sure)

When some dimensions must be omitted in the making of a working drawing, the ones given should be _____?

Those that are most needed for understanding the drawing

If it is ever necessary to reduce the pump flow temporarily, do so by?

Throttle the discharge

If it is ever necessary to reduce pump flow temporarily, do so by _____?

Throttling the discharge

When you find a chisel that has a mushroom head, you should _____.

Throw it away because it is a safety hazard/grind the mushroom down to its proper shape

Which of the following is the correct procedure when adjusting a gland nut on a newly packed pump?

Tighten with the pump running until there is a slight leakage

What's the purpose of a safety lock-out program.

To protect the circuit you are working on, to protect the life of the person working on the circuit and to protect the employer from a lawsuit.

The twist in a shaft has one end fixed and the other which is twisted toward the force that's applied. It is called _____?

Torque

When the current setting is too high, the metallic bead will be _____.

too high

Baffles in an interceptors reduce _____ within interceptors?

turbulence

The most important single factor in determining prolong effectiveness of oil is its _____.

viscosity

*What is necessary in the zone coded annunciator system?

zone light of annunciator panel (Rob isn't sure)

If an object is drawn ¼ scale, the scale of the drawing is _____?

¼ in. = 1 foot

So that it can be turned off quickly in an emergency, the acetylene valve should be opened _____.

¼ turn

Greases are clarified as to their mobility and oil content by the _____.

SAE

With direct event is obtained with keeping operating equipment and the surrounding areas cleaned and painted?

Save environment, pride and ecological

There are three types of load or drag that comprise sliding friction. Which of the following is inappropriate to the list?

Scuffing

Removal of solids such as rock, metal or sand can be accomplished with an _____ interceptor?

Sediment

When will closed loop hot water or chilled water systems require make up water?

Seldom

If he fixed your trap has excess about the distance for the pitch is excessive _____ could occur?

Self siphon

Interceptors are designed to _____?

Separate hazardous material from waste

Rays emitted from electric welding can cause _____?

Serious burns

Traps are installed to prevent _____ from entering the structure?

Sewer gas, offensive odors and vermin

What type of gasket material is recommended for water which flows?

Sheet rubber/cloth inserted rubber

An oxy-acetylene system is used for the following purposes.

Silver soldering copper & brass joints, cutting metal and brazing.

Fire pumps supply pressurized water to two fire suppression systems, they are_____.

Wet standpipe and sprinkler systems

Purging the hose lines on a oxy-acetylene torch should occur _____.

When securing the rig for the day.

Parallel alignment is _____?

Where the center lines of the two shafts are in parallel.

Approximately how often should lighting fixtures be cleaned?

Yearly

Should safety glasses been worn when using a hacksaw?

Yes

The voltage produced across the arc by a motor generator DC welder is usually in the range of _____.

15-45

Filter lenses in what shade number are recommended in medium gas welding?

6

*Water in its natural state to have a pH is high as_____.

7

1 cubic feet of water is how many gallons?

7.48

The drainage fixture unit is equivalent to how many gallons of water flow?

7.5 GPM

One horsepower = _____?

746 watts

One horsepower equals?

746 watts

Filter lenses of what shade number are recommended for arc welding and cutting with a range of 30-75 amps?

8

A quarter (1/4 of an inch) bend changes the direction of the pipe _____?

90 degrees

Quarter bend changes the direction of flow _____.

90 degrees

How much power be supplied the fire pumps in Los Angeles according to the Los Angeles Fire Department?

?

Which type of pipe is approved by N.S.F. for potable water system?

A.B.S.

Continual problems with belt turnover are likely to be caused by_____.

Belt de-lip, the use of belt dressing and improper installation technique

As to the content of portable fire extinguishers which of the following answers is not correct?

Carbon monoxide

Which of the following types of pumps will not be suitable for pumping large volumes of water against low heads or low pressures?

Centrifugal

When assembling a large diameter pipe, a _____ wrench may be very helpful?

Chain

What can change the performance of a given pump, by changing the speed at the impeller edge, which can be done by _____?

Changing the RPM and changing the impeller diameter

Which of the following metals is not generally considered as a suitable packing material?

Chrome steel

Which of the following is the best method used for measuring a piece of pipe with a fitting screwed on it?

End to center

What method is used for measuring a full length of pipe?

End to end

The common cause of trap seal loss is _____.

Evaporation

Lawn sprinklers are inefficient irrigation devices because of what losses?

Evaporation and runoff

A type of drawing that shows all parts in the mechanism but separates them from one another is called an _____?

Exploded view

Water is a popular media for fire suppression for which of the following reason?

Readily available and low cost; cools and smothers; emulsifies and dilutes

The correct sequence of soldering is _____, _____, _____, _____ and _____?

Reaming; cleaning; fluxing; assembling; soldering

There are six general rules when installing the V-belts, one of them is _____.

Recheck the belt tension after 24 or 48 hours of operation

Type M copper is color coated _____.

Red

The main purpose of lubrication is usually to _____?

Reduce friction and wear

Throttling means is used to _____?

Reduced flow or pressure but still allow some flow

Soldering joints are used when connecting _____, _____ and _____?

Refrigeration lines; domestic water line and hot water line.

Solder joints are used when connecting _____, _____ and _____.

Refrigeration lines; domestic water; hot and cold heating lines

The best tool to use on refrigeration valves that have no handles is _____?

Refrigeration wrench

To reduce slippage, _____ is applied to a trap wrench?

Resin

What do you apply to strap wrenches to reduce slippage?

Resin

In general, electrodes used for welding non farris material are of what type?

Reverse polarity

The two main components of alternating current motors are the _____ and the _____.

Rotor; starter

Flux should be applied immediately after _____.

cleaning

The size of a belt is given in letters, i.e., V-belt. The V represents the _____.

cross sectional area

A sprinkler system with sprinklers that stay open all the time is a?

deluge