Trade Section Flashcards by Azeneth Avalos

Slip joint fittings are not allowed at:
A. the overflow pipe from a tub
B. the sink tailpiece
C. a PO (post overflow plug from a lavy)
D. a waste arm or trip arm

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In back-to-back water closets, what fitting would be used?
A. double-hub tee
B. double-hub upright wye
C. Figure 5
D. None of the Above

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On a waste line, what type of fitting can you use?
A.cleanout
B. wye of ¼ bend
C. sanitary tee
D. All of the Above

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What would you use to connect GIP (galvanized iron pipe) to copper?

A. a copper fitting
B. welding
C. brass fitting
D. a special aluminum fitting

C
dielectric is best. brass next best-purpose to prevent electrolysis

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One gallon of water weighs:

A. 9.33 lbs.
B. 8.33 lbs.
C. 7.33 lbs.
D. 6.33 lbs.

B 8.33lbs.

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One psi of water is equal to:

A. 2.31 feet
B. 2.00 feet
C. 4.41 feet
D. 3.00 feet

A 2.31 feet

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The specific gravity of water is:

A. 0.1000
B. 0.010
C. 0.001
D. 1.000

D 1.000

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In a solar system, where do you place a pump valve?
A.one the return side of the system
B.supply and service side of pump
C. supply side of pump
D. service side of pump

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In a solar system cross-connections are used if:
A. Never
B. if it is a closed-loop system
C. Always
D. if it is a open-loop system

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How many square feet would a family of six require if a family of four requires 48 sq. ft. of solar panels?
A. 78
B. 72
C. 60
D. 62

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A 2 inch vent will suffice for:

A. 4 pedestal urinals
B. 25 lavatories
C. 18 residential sinks
D. 16 showers

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A dental cuspidor has how many fixture units?
A. 2
B. 3
C. 4
D. 1

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In water piping, slip joints may be used in the ___ fixture____.
A. concealed - return
B. exposed - return
C. concealed - supply
D. exposed - supply

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What do you do in a restaurant to install a new water softener?
A. use a full bypass
B. use a check valve
C. mount it on concrete
D. backwash disposal must be sized by a building authority

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How is pressure affected when a water softener is installed?
A. decreases
B. is not affected
C. increases
D. A and B

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A single trap may receive the waste from a:
A. kitchen sink and clothes washer
B. laundry tub and clothes washer
C. kitchen sink and laundry tub
D. None of the Above

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When permitted for special conditions, which of the following traps may be installed?
A. bell
B. drum
C. full “S”
D. Crown vented

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What provision must be taken when installing drawn brass tubing traps not less than 17 B & S gauge on fixtures discharging liquid wastes?

A. traps used only in single family residences
B. traps exposed and readily assessable
C. traps not used in condos
D. traps installed 1 foot above grade

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In swimming pools, where can you use copper pipe?

C. all lines
A. suction line
B. high pressure line
D. in gutters

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In swimming pools, where can you use copper pipe?

C. all lines
A. suction line
B. high pressure line
D. in gutters

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On building drains, what type of pipe is not generally used?
A. copper
B. cast iron
C. plastic
D. brass

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The heaviest copper pipe is:

A. Type L
В. Туре М
С. Туре К
D. Type DWV

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Where can copper tubing be connected to a ½/ inch copper 90° ell?
A. in four directions
B. at one end
C. at both ends
D. at two ends and the middle

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On a gas supply line to a water heater, ⅜ inch copper tube is permissible.
A. False
B. True

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Which of the following is TRUE? A. red stripe - L B. blue stripe - DWV C. yellow stripe - M D. green stripe - K

When cutting pipe, why is reamer used? A. to strap the pipe B, to remove internal burrs C. to thread pipe D. to flare the pipe

Which of the following is used to thread pipe? A. wrench B. dies C. reamer D. None of the Above

What are anti-siphoning devices used for? A. cross connections B. thermo-siphoning systems C. potable water systems D. None of the Above

How is plastic adapted to cast-iron bell and spigot? A. oakum with lead wood В. ероху C oakum with cold-poured lead D. approved lead-joint plastic adapter

To cut plastic pipe, use a: A. hacksaw B. tube-cutter with special wheel C. chainsaw D. handsaw with 6 teeth per inch

On flat-sided nuts and bolts, what sort of wrench would you use? A. strap B. channel locks C. open-end pipe D. chain ratchet

What is used to bend soft copper tubing? A. pipe wrench B. torch C. dummy D. spring bender

What is a yarning iron used for? A. no-hub B. hub pipe C. knitting D. brazing

A torque wrench for a no-hub coupling should release at: A. 120 inches/lb. B. 80 inches/Ib. C. 100 inches/lb. D. 60 inches/lb.

On chrome fittings, what sort of wrench would you use? A. strap B. plastic C. pipe D. vice

On nickel-chrome pipe fittings what sort of wrench would you use? A. plastic B. strap C. vice D. pipe

On plastic fitting, what sort of wrench would you use? A. pipe B. strap C. plastic D. vice

How far does ¾ inch brass pipe 100 feet long expand with a 100° F rise in temperature? A. ¾ inch B. 1 inch C. 1 ½ inch D. 1 ¼ inch

How far does ¾ inch steel pipe 100 feet long expand with a 100°F rise in temperature? A. ¾ inch B. 1 inch C. 1 ½ inches D. 1 ¼ inches

After a 100° F rise in temperature, which type of plastic pipe expands 3 ½ inches per 100 feet? A. PVC B. ABS C. polyethylene D. polypropylene

What is the relationship of PVC to that of steel pipe? A. equal to B. less than C. greater than D. PVC does not expand

Which of the following has the greatest expansion of pipe? A. plastic B. brass c. copper D. steel

A connector with side-threaded female arms on one end and a threaded male on the other is called a: A. field tee B. bushing C. drop ell D. connector

An aspirator is a device that creates: A. a negative pressure and sucks up liquid B. a positive pressure and sucks up liquid C. a negative pressure only D. a positive pressure only

What is the difference between a standard crushed-rock drainfield and a tile field? A. pitch B. function C. material in field D. length

What is a pressure-type vacuum breaker used for? A. control water pressure B. prevent back-siphoning C. develop a vacuum D. eliminate waterhammer

What is it called when a plumbing fixture is filled with water to the top rim? A. overflowing B. backflowing C.flooded D. None of the Above

On a steam condensate return line, which is best to use? A. bell reducer B. eccentric reducer C. either A or B D. None of the Above

71. To prevent damage of piping due to structural settlement, install: A. rigid hangers B. plumber's loop C. swing joints D. return bend

A percolation test is a test to determine: A. the drain field under a concrete foundation B. whether the soil is porous enough to absorb effluent water and waste C. the vapor barrier D. the boiling point of materials

A pipe connecting upward from a soil or waste stack to a vent stack for the purpose of preventing pressure changes in the stacks is called a: A. vertical stack B. upright hub C. yoke vent D. None of the Above

In a venting system, vent connector connects: A. an appliance to a vent B. vent to drain C. a fixture trap to vent D. vent to vent stack

The ends of plastic pipe are roughed up: A. for a better fit B. make fitting go in easier C.to remove the gloss D. insure uniform flow of cement

What should be done when joining plastic pipe? A. make sure cement flows freely B. wait for one minute after applying cement C. hammer fittings together D. None of the Above

How long should you wait after cementing the last plastic pipe joint before testing? A. 1 hour B. 3 hours C. 2 hours D. 4 hours

How should you compensate for expansion of an ABS plastic vertical stack? A. expansion joints B. use no-hub coupling C. anchor in walls D. strap it down firmly

At what intervals should polybutylene be supported when hanging it? A. 12 inches B. 24 inches C.36 inches D. 50 inches

To connect polybutylene pipe, what type of joint is used? A. butt fusion B. solvent weld only C.compression joint D. Both A and C

Polybutylene pipe is produced in what color? A. black B. white C. gray D. All of the Above

What type of plastic pipe is used when it needs to withstand temperatures of 220°F? A. PVC B. CPVC C. PB D. FRP epoxy

Which plastic pipe is approved for hot water high-pressure piping! A. PVC B. PB C. PE D. styrene-rubber

Water hammer is virtually eliminated with: A. ABS B. PB C. CPVC D. PVC

Over plastic sewer and water pipe, what is the minimum earth coverage needed? A. 8 inches B. 2 inches C. 6 inches D. 12 inches

When a layer of gravel or equally pervious material four feet thick is found, the depth of the cesspool below the inlet need not be more than: A. 8 feet B. 5 feet C. 20 feet D. 10 feet

The developed length between the trap of a water closet and its vent shall not exceed: A.5 feet B. 6 feet C. 10 feet D. 15 feet

How far above ground must galvanized wrought iron or galvanized steel pipe be kept? At least: A. 4 inches B. 6 inches C.12 inches D. 2 inches

Which of the following dimensions represents the limits of clothes washer standpipe above its trap? A. 12-18 inches B. 18-36 inches C. 24-30 inches D. 18-30 inches

An atmospheric vacuum breaker should be installed a minimum of _____above grade. A. 6 inches В. 3 inches C. 18 inches D. 12 inches

When a sewer line is nonmetallic, a water service pipe in the same ditch must have a minimum clearance of __. A. 12 inches B. 18 inches C. 24 inches D. 6 inches

What is the longest length of horizontal drainage pipe allowed before a cleanout is required? A. 100 feet B. 75 feet C. 125 feet D. 50 feet

How high should the water inlet be when roughing-in a wall-hung urinal? A, 52 inches B. 48 inches C.54 inches D. 50 inches

How high should the waste outlet be from the floor when roughing-in a wall-hung urinal? A. 12 inches B. 11 ½ inches c. 10 inches D. 12 ½ inches

How far should the face of the ¾ inch spud be from the wall when roughing in a urinal? A. 3 inches B. ½ inch C. 1 inch D. 2 inches

How thick must lead bends and lead traps be? At least: A. 1/8 inch B. 3/16 inch C. 1 mil D. 1/16 inch

How much does ¾ inch (ID) lead pipe weigh per foot? A.3 B. 5 C. 7 D. 4

When working with hot lead, before you dip the ladle into hot lead, you should: A. cool the ladle B. dip the ladle in cold water C. dip the ladle in hot water D. heat the ladle over dry heat

Solder for lead joints is___% tin and___% lead. A. 80% and 20% B. 60% and 40% C. 70% and 30% D. None of the Above

When making up a lead joint, how far from the end should you clean lead pipe? A. 2 inches B. 1 inch C.4 inches D. 3 inches

Which of the following may be used when bending lead pipe? A. a beer bottle B. running rope C. a spring bender D. hot sand

Sheet lead in shower pans must be at least how many pounds per sq. ft.? A. 5 B. 6 C. 4 D. 7

Sheet lead for flashings or vent terminals must be at least: A.5 B.2 С. 3 D. 4

Cast-iron pipe can be used for: A. acid waste systems B. water lines C. gutter drains D. pressure lines

Which pipe requires the least amount of fittings per run? A. cast iron B. copper C. PVC D. clay

Cast iron pipe in a swimming pool can be used for: A.pressure line B. gutter lines C. nowhere D. suction line

The standard gap in the oakum in cast-iron pipe is: A. 3 inches B. ½ inch C.1 inch D. 2 inches

The standard depth of the lead in cast-iron pipe is: C. 3 inches A. 2 inches B.1 inch D. ½ inch

To cut cast-iron pipe, what tool would you use? A. cold chisel В. heavy duty pipe cutter C.ratchet cutter D. straight snips

On what pipe would you NOT use a wheel cutter? C. steel A. brass B.cast iron D. copper

What method is used to join cast iron to copper DWV pipe in a waste and vent system? A. solder B. neoprene coupling C. threaded D. no-hub coupling

To join cast iron to copper on a waste and vent system, use: A. PVC B. lead and oakum C. brass coupling D. no-hub coupling

Where would you look up requirements for a drain or leach system in the UPC? A. Appendix D: Rainwater systems B. Appendix B: Explanatory Notes on Combination Waste and Vent Systems C. Appendix I: Private Sewage Disposal Systems D. Appendix A: Recommended Rules for Sizing the Water Supply System

The inspection of gas piping that includes a determination that the gas piping size, material, and installation meet code requirement is called a: A. topout inspection B. gas company inspection C. final piping inspection D. rough piping inspection

The static water pressure at the water meter is 80 psi. What would be the static pressure at a supply outlet 40 feet above the meter? A. 40 psi B. 80 psi C. 60 psi D. 120 psi

C 40' x 1/2psi = 20 psi 80 - 20 = 60

The inspection of a plumbing system prior to covering walls and floors is called a: A.site inspection B, rough inspection C. routine inspection D. hydro inspection

The CSI classifies plumbing in what division of the building trades? A.Division #15 B. Division #13 C. Division #16 D. Division #14

What is used to join a short gap in galvanized pipe? A.bushing B.union C. coupling D. nipple

Where can galvanized pipe not be used? A. for water B.gutters C.for above-ground drainage D. if there is acid in the water

How do you seal threaded galvanized pipe so it won't leak after you have made it up? A. linseed oil B. red or white lead C. Portland cement D. oakum

What causes excessive noise in pipes? A. pipes not properly strapped or secured B. air chamber not functioning properly C. A or B D. None of the Above

How do you locate a leak in gas piping? A.applying an acid solution В.applying soapy water to the piping exterior C.striking a match D. smelling for gas

If you find a defect in gas piping or fittings, you must: A.flood the interior with strong acid B.repair the defective piece C.remove the defective piece and replace it D. flood the interior with hot solder

What is the probably the cause if a flushometer valve fails to shut off? A.water is muddy B.water pressure is too high C.relief valve failed D. bypass orifice failed

What causes water to surge when you open a faucet in an old house and then stop? A. water hammer В.wrong pipe size C.restriction in the pipe D. unsolvable problem in old houses

What should you do first if you have a leak at fitting in a water line under a house? (assume copper or PVC) A. stuff bread in the line B.stuff putty in the line C.smear soap over the leak D. drain the building system

What is most likely the reason for low pressure in a steam pipe? A. wrong type of pipe B. poor pipe wrapping C. pipe too old D. wrong direction of flow

What causes noise in a steam line? A. radiator not level B. controlling flow of steam with a valve at the radiator C. sagging line D. All of the Above

Where do you install the relief (pop-off) valve on a boiler? A.at the close nipple B.near the main header at the top of the boiler C. halfway between low-water and high-water mark D. low-water cutoff device

On a boiler, where is the pressure gauge installed? A. wet return from the pump B. not in direct contact with the system C.on the boiler drain D. in direct contact with the system

To reduce city water pressure to the boiler, you would use a: A. feeder cut-off B. siphon valve C. expansion tank D. reducing valve

What valve do you use to relieve pressure when working on a boiler? A stop valve B. check valve C.safety valve D. high-pressure safety plug

What do you call the horizontal pipe connected to the boiler system outlet(s)? A. return main B. supply main C. steam main D. steam header

When replacing the water heater, the vent from a water heater must be disconnected. A. False B. True

A water heater radiator in the summer must be: A.filled with cold water B. vented C. all fittings disconnected D. filled to vents with fuel oil

The most efficient type of water heater is: A. operating solar B.gas C.propane D.electric

Where do you vent a hot water heater? A. hot air duct В.plumbing vent C.cold air duct D. combustible air duct

Where do hot and cold water lines converge? A. dishwasher B. washing machine C.water heater D. None of the Above

The maximum temperature range a domestic hot water heater should be set at is: A. 120-130°F B. 110-120°F C.140-160°F D. 130-140°F

A hot-water heater must have a safety strap especially in earthquake active territory. A. False B. True

Isometric drawings consist of a(n): A. plan view B. two-dimensional view C. elevation D. three-dimensional view

Type B vent must have a minimum grade of: A. ¼ inch per 1 foot of length B. ⅛ inch per 1 foot of length C. ½ inch per 1 foot of length D. 1 inch per 1 foot of length

What are elevation measurements on a piping plan called? A. isometrics B. line drawing C.invert elevations D. capillary drawings

Where are invert measurements taken? A. inside bottom B. inside top C. outside bottom D. outside top

The name of the established level or elevation from which vertical measurements are taken is called: A. Obvert B. invert C. Bench mark D. datum

The measure on which all but vertical measurements are taken is called: A. invert B.obvert C. datum D, bench mark

Elevations and grades are determined from the: A bench mark B base elevation C.bench grade D. weir

Where would you look on a plan for the width and height of a specific part of a building? A.plan index B.legend C. plan glossary D. sectional elevation drawing

Which parts of a building are you advised to check, by authorities in the field, to ensure accuracy when you have taken a measurement from a plan? A. one end B. three sides C.two ends D. four sides

What should the maximum pitch of a drainfield be? A. ½ inch in 50 feet B. 1 inch in 50 feet C. ½ inch in 100 feet D. 1 inch in 100 feet

Brass fittings are made of 85% copper, 5% zinc, 5% tin, and 5%____ A.steel B. iron C.lead D. magnesium

What metals are continuous wastes and fixture tailpieces constructed of? A. steel B. aluminum C. brass D. die cast zinc

No-hub coupling may be used to join the following 1 ½” and 2” plain-end piping, except for:

A.copper tubing B. brass piping C. plastic piping D. galvanized steel pipe

Where can you NOT install a gas line? Under a___ A concrete deck of pool B driveway C. barbeque pit D. patio cover

The passageway in a gas valve (the valve opening) must equal the area of the pipe served. A. True B. False

How much earth is needed over metal gas pipe? A. 2 inches B. 5 inches C. 6 inches D. 12 inches

How much earth coverage is needed over plastic gas pipe? A.6 inches B.12 inches C. 18 inches D. 36 inches

A plumber may do all of the following to gas pipe except: A. use all joints except screw joints B. bend or strain C. use fittings the same material as the pipe D. use bushings in accessible locations

Every_____feet, supports for a 1½ inch gas line should be spaced. A.3 feet B. 4 feet C. 9 feet D. 10 feet

A halogen test is used to: Asolder В.locate a gas leak C.braze D. melt lead

The usual practice is to apply heat when soft-soldering a horizontal joint. A. to the side and solder to the top B. to the bottom and solder to the top C. to the top and solder to the bottom D. and solder to the same areas simultaneously

Stop soldering a joint when the brazing alloy: A forms a continuous fillet around the joint B. becomes hard C. gets ½ inch thick D. oxidizes

In a closed system, when brazing a jacketed or hollow fitting: A clamp firmly in place B. fill the hollow with water C. drill a hole to let out gas D. fill the hollow with inert gas

When brazing, you heat the filler rod_______ the material. A. more than B. same as C. less than D. None of the Above

When is a brazed joint used on copper? A. additional strength B. never C. underground D. if water temperature is low

When is a brazed joint used on copper? A. in concrete B. if chemicals are in water C. underground D. if water is 350°F or higher

The preferred practice is to apply brazing alloy when brazing a horizontal joint in the following sequence: A. top, sides, bottom B. bottom, sides, top C. sides, bottom, top D. sides, top, bottom

How do you increase the arc voltage in a constant-current machine, when arc welding? A. decrease DC power B. decrease are length C.increase AC power D. increase arc length

To keep 2 pipes in true alignment when welding, what should you use? A. tack welds B. pipe dope C. a welding vise D. double pass of Teflon tap

What should you do if a flashback happens when working with a torch? A. turn off the acetylene valve B. shut the torch off immediately C. shut the torch off gradually D. turn off the oxygen valve

What should you do if a torch tip is brought too close to welding material so that is pops and goes out? A. turn off oxygen at the valve B. turn off the torch C. immediately re-light D. turn off oxygen and acetylene valves

Oxygen regulators should be oiled: A. once a year B. once a week C. once a month D. Never

The valve of an oxygen bottle should be opened how far? A. slightly B. ½ turn C. fully D. 3/4 turn

The valve on an acetylene bottle should be opened how far? A. slightly B. ½ turn C. fully D. 3/4 turn

will get a shock if an electrical circuit is live when you attach: A. white wire to the pipe B.green wire to the pipe C. ground wire to the neutral wire D. black wire to the pipe

Indirect waste piping need not be larger in diameter than the drain outlet or tail piece of the fixture, but in no case less than: A. ½ inch B. ¾ inch C. 1 inch D. 2 inches

Indirect waste pipes exceeding 5 feet in length must be: A threaded B. bvented C. painted D. trapped

What is the steam-radiator system if one pipe carries both steam and condensed water? C. bitempered D. one-pipe A. two-pipe B. bivalve

What is the steam radiator system if one pipe carries steam and the other carries condensed water? A. two-pipe B. one-pipe C. unitempered D. univalve

Radiant heating coils should be installed in: A. the floor B. a wall C. The ceiling D.the corner of a room

Backwater valves should have the following except: A. cast-iron or brass bodies B. non corrosive bearings and seats C. a spring seal set normally open D. self aligning discs

Whenever possible a 1 ½ inch pipe must be used? B. False A. True

Which type of drainage pipe cannot be used above ground? A. steel B. copper C. plastic D. vitrified clay

What is the maximum operating pressure of a hot water boiler? A. 30 psi B. 10 psi C.100psi D. 120 psi

Where is a cleanout not required? A.drain systems B. indirect wastes C.building sewers D. combination wastes and vents

Who is responsible for paying for repairs if the plumbing in a building becomes nonfunctional? A. owner B. tenant C. builder manager D. building inspector

How do plumbers measure when laying out pipe? A. back to end B. back to center C. face to face D. center to center

Which pipe can you not use for interior RWL? A. cast iron B. plastic C. borosilicate glass D. copper

If a pipe is under the floor and inaccessible, you need a cleanout above the first floor or it must extend outside. If accessible by a manhole, it must be within 20 feet of the hatch. A. True C. False

On a no-hub coupling, what is normal torque? A. 80 in. Ibs. B. 60 in. Ibs. C. 120 in. lbs. D. 100 in. Ibs

Natural gas smells due to? A. additive (man made) B. been in ground for 1000 years C. fossil fuel D. pumped up from ground under pressure

What is Asbestos-cement pipe used for outside a building? A. never B. water mains C. domestic sewage D. industrial sewage

To what must wall-mounted wated closets securely bolted? A. floor flanges B. carrier fittings C. closet bends D. wall brackets

Each drainage stack which extends ten or more stories above the building drain must be served by a(n): A. island vent B. velocity indicator C.parallel relief vent stack D. overflow drain stack

Which of the following can a venting system pass through? A. vent shaft B. chimney serving fireplace C. combustion air duct D. None of the Above

If an inspector rejects a job the first time, when can the contractor NOT be charged for re-inspection? A. the contractor cannot be charged for a reinspection- just the original inspection В. if the inspector was called before all work on the job is completed. C. if the inspector was called after the portion of work for which the inspection was called is complete. D. if the inspector was called before the portion of work for which the inspection was called is complete.

Who is responsible for keeping records of changes on jobs? A. project manager B.subcontractor C. supervisor D. general contractor

You apply for a contractor's bond and are refused. To whom may you complain if you believe you were unfairly denied? A. a civil court of law B, the commissioner C. the insurer D. the Contractor's State License Board

If your sub orders materials that don't arrive when due, what is not a good excuse? A. architect's neglect B. excessive delay by suppliers because of seasonal demands C. truck breakdown D. None of the Above

A contractor discovers a serious code violation on an approved set of plans: A. the work must stop until a new set of plans is submitted B. the work may continue if the contractor files a notice of non-responsibility C. the work may continue because the work was approved by the authorized agencies D. the work must stop until the contractor reports the violation and has the plans corrected

An approved set of plans should be kept: A. at the jobsite B. by the building official C.by the contractor D. All of the Above

You must have Worker's Compensation Insurance if you have ____ employees? A. 11 B. 10 C. 9 D. 1

A step ladder should have: A. steel plate on bottom B. handholds C. plaster on bottom of legs D. locking mechanism

What color tags does CAL/OSHA place on a piece of equipment that is unsafe and needs repair ? A. purple B. blue C. orange D. Red or yellow

An excavated ditch of 6 feet should: A. be fenced off B. have a sign posted indicating its depth C. already be shored up D. have a ladder

What condition would increase the carbon content in the metal being welded when you cut steel with oxygen and acetylene? A. too much oxygen B. impossible to do C. too much acetylene D. not enough acetylene

The oxygen hose is colored: A. green B. white C. blue D. red

The acetylene hose is colored: A. green B. white C. blue D. red

In a torch, the pressure of acetylene is: A. 90 psi B. 30 psi C. 60 psi D. 15 psi

You should use what type of allow when brazing stainless steel? A. silver B. copper C. brass D. zinc

Who does not have to keep CAL/OSHA records of injuries and illnesses? A. employers with 10 or fewer employees B. a family-owned and operated enterprise C. labor unions D. employers with 20 or fewer employees

Extension ladders must overlap at least _____ % of the working length. A.5% В. 10% C. 20% D. 1%

Landing platforms must be provided every _____ feet if a worker must climb to a height greater than 20 feet on a ladder. A. 20 B. 40 C. 10 D. 30

In an excavated area, provide a ladder every ______ feet. A. 50 B. 25 C. 100 D. 75

What should you use to wash off a toxic chemical burn? A. Milk B. Soda C. Water D. None of the above

The proper technique for lifting heavy loads is to: A. bend knees and back B. stand straight at all times C. bend knees and keep back straight D. bend back and keep knees straight

Ladder rungs must be spaced_____ inches apart and be____ inches long. A. 11, 11 B. 12, 11½ C. 11½, 11½ D. 12, 12

A type Ill fire-resistive building is made of: A. steel, iron, concrete, or masonry B.concrete and iron C.any materials permitted by the UBC D. concrete and steel

Which of the following is NOT correct? A. a Type V building is of steel, iron, concrete, or masonry B. a Type IV building is of any material permitted by the UBC C. a Type III building is of any material permitted by the UBC D. a Type Il building is of steel, iron, concrete, or masonry

You must have a first-aid kit if you have employees. A. 5 B. 10 C. 15 D. 1

The symptoms of shock are: A. flush skin B. pale, sweaty, rapid and weak pulse C. pale, sweaty, slow and weak pulse D. pale, sweaty, fast and strong pulse

If a co-worker falls down and suffers a deep, bleeding gash to the head, you should: A. depress artery B. apply a tourniquet C. administer CPR D. apply direct pressure to the wound

Whom should you call for a DOSH permit? A. district office of the Contractor's State License Board B. the district or field office of the Division of Occupational Safety and Health (DOSH) C. the building inspector D. the Registrar of Contractors

How high can you horse (single and non collapsible) before you can scaffold? A. 12 feet B. 10 feet C. 16 feet D. 6 feet

If an electrical fire starts when using power tools or other electrical equipment, what should you use to put it out? A. carbon tetrachloride B. pressure water C. foam D. baking soda or carbon dioxide

What makes a fold-out ladder safer than other types? A. rubber base B. metal base C. handholds D. locking brace

What does NOT happen on a CAL/OSHA inspection? A. a closed-door meeting with union officials B. a tour of the work site C. a citation of every violation seen by the inspector D. a reading of the contractor's rights

How far from the edge should excavated spoils be deposited during excavation? A. 3 feet B. 1 foot C. 2 feet D. 4 feet

You may excavate in good soil without shoring up to a depth of: A. 8 feet B. 12 feet C. 5 feet D. 3 feet

What can you install into a water heater to prevent corrosion? A. deralter B. peramis C. protector rod D. protector vent

How far above grade must exposed gas piping be kept? A. 3 inches B. 12 inches C. 6 inches D. 18 inches

To change water to ice, how many BTU's are required? А. 88 BTU/lb. В. 144 BTU/lb C. 100 BTU/lb D. 157 BTU/lb

Caulked joints for cast-iron bell-and-spigot soil pipe must be filled with molten lead to a depth of not less than: A. ½ inch B. 1 inch C. ¾ inch D. 2 inches

What scale is the absolute zero version of the Fahrenheit scale? A. Centigrade B. Kelvin C. Rankin D. Celsius

What is the CAL/OSHA approved longest length ladder? A. 34 feet B. 48 feet C. 44 feet D. 50 feet

Which measurement do you list first when ordering tees? A. largest overall C. smallest run or flow B. branch line D. largest run or flow

A regulator on oxyacetylene welding equipment can be damaged if: A. the torch fuel valve is closed while the oxygen valve is open B. a cylinder valve is opened too quickly C. a cylinder valve is left closed D. a cylinder valve is opened too slowly

What is the minimum gallons per minute and the maximum gallons per minute permitted rates of low for a grease trap? A. 10 and 20 B. 20 and 45 C. 15 and 30 D. 20 and 55

The minimum permitted earth cover over PLASTIC gas pipe is: A. 6 inches В.8 inches C. 12 inches D. 18 inches

The pilots and burners of a gas-fired appliance must be located how far above the floor of a residency garage ? A. 6 inches B. 12 inches C. 18 inches D. 24 inches

To equal the volume of 360 fL of 3 ½ inch pipe, how long would a run of 1 ½ inch pipe have to be? A. 1956 ft. B. 2308 ft. C. 2934 ft. D. 3462 f.

A 90° Ell is equal to: A. 1/8 B. 1/16 C. 1/2 D. 1/4

Termination of vents from any window, door, opening, air intake or vent shaft may not be less than: A. 1 ft. B. 3 ft. C. 8 ft. D. 10ft

What is the minimum clearance permitted between a combustible wall and an un-insulated gas-fired water heater? A. 2 inches B. 3 inches C. 6 inches D. 12 inches

To determine if a wire is properly grounded, you should use a(n): A. fuse B. ammeter C. continuity tester D. voltmeter

It is unsafe to stand on the top ____ rungs of a without a safety belt. A. 1 B. 2 C. 3 D. 4

At what angle should the tip of an oxyacetylene cutting torch be held when cutting cast iron? A. 20° B. 45° C. 50° D. 90°

Acetylene should not be used above ___ psi because of danger in explosion . A. 10 B. 15 C. 20 D. 30

The minimum trap seal is____ & maximum is ____. A. 1 ½ & 2 B. 2 & 4 C. 2 & 2 ½ D. 2 & 5

Abandoned sewers are to be capped off within: A. 5ft of property line B. 5 ft of nearest street C.10 ft of property line D. 10 ft of nearest street

At what temperature should water be kept in a dishwasher? A. 140°F B. 150°F C. 160°F D. 170°F

Horizontal drainage piping diameter must have a uniform slope of not less than____ inches per foot when possible. A. 1/6 B. 1/8 C. 1/4 D. 1/2

What must the position of a regulator valve on oxyacetylene equipment be before opening the oxygen cylinder valve? A. open-oxygen valve is then turned counter-clockwise B. open-oxygen valve is then turned clockwise C. closed-oxygen valve is then turned counterclockwise D. regulator valve must remain open whether oxygen valve is open or closed

If you double the diameter of a pipe, its volume will increase how many times? A. 2 B. 4 C.6 D.8

The minimum size vent pipe used for a lavatory is: A. 1 ¼ inches B. 1 ½ inches C. 3 inches D. 2 ½ inches

How many inches above a sewer line can a water main be laid? A. 6 inches B. 12 inches C. 9 inches D. None of the Above

What do you use to find a good ground? A. ammeter B. voltmeter C. continuity meter D. megar

When soft-soldering a copper joint with alloys, what do you use to check for leaks? A. flux B. air C. soapy water D. other

If a power pole is supplied on a job, what is the correct procedure? A. borrow power from the carpenter B. use grounded cord C. other

What would cause an uneven flow from a boiler? A.grease and dirt in the boiler B. a shut valve С.outlet line too small D. other

In a solar system in which the heat exchanger uses air over coils, what would lead to uneven transfer of heat? A. uneven flow of air B. no sunshine C. no alternative source D. None of the Above

At what angle do you hold a rod and torch when welding pipe? A. rod and torch tangent to pipe B. rod and torch tangent to the pipe itself C. touch tip on centerline of pipe D. 90° angle

Plastic pipe threaded joints must use: A. listed thread tape or thread lubricant B. putty C. mineral oil D. linseed oil base products

The static water pressure at the water meter is 80 psi. What would be the static pressure at a supply outlet 40 feet above the meter? A. 40 psi B. 80 psi C. 60 psi D. 120 psi

C 40' x 1/2psi = 20 psi 80 - 20 = 60

If 2 tons of water circulate in a building over a period of 1 full day, how many cubic feet of water are circulating per hour? A. 64.20 cu ft. В. 480.19 cu. ft. C. 8.33 cu. ft. D. 2.67 cu. ft.

D 1 cu. ft. water = 62.425 lbs. 4000 / 62.425/24 hr = 2.67 CF/hr

How large a vent hole is required for a water heater rated 90000 BTUH? A. 3 sq. in. B. 12 sq. in. C. 9 sq. in. D. 16 sq. in.

D 1 sq in = 5000btuh 80,0000 \ 5000 = 16

How much water is in 18 inches of a 4 inch pipe? A. 125.6 cu. in. B. 12.56 cu. in. C. 288 cu. in. D. 226 cu. in

D Area = 3.14 x r2 A = 3.14 x 2 x 2 A = 12.56 sq. in. Volume = area x height V = 12.56 x 18 inches V = 226.08 cu. in.

How much water is in 18 inches of a 4 inch pipe? A. 125.6 cu. in. B. 12.56 cu. in. C. 288 cu. in. D. 226 cu. in

D Area = 3.14 x r2 A = 3.14 x 2 x 2 A = 12.56 sq. in. Volume = area x height V = 12.56 x 18 inches V = 226.08 cu. in.

What would be the total drop at the end of a run, if there are 300 feet of drain line with a 2 degree drop in grade? A. 42 inches B. 62 inches C. 52 inches D. 75 inches

D 1/4” fall per foot x 300 feet = 75 inches

2% grade in 100 feet is equivalent to how many inches? A. 2 inches B. 3 inches C. 12 inches D. 24 inches

D 12" x 2% = .24 in. drop/ft. 100 ft. x 0.24 in. = 24 in.

How many gallons can the following tank hold? - 4'6" wide, 10 ft. long, 6 inches deep -freeboard is located 2ft. below the 4 ft. level -sludge capacity is 40% of the total volume A. 700 - 900 gal B. 1101 - 1300 gal C. 901 - 1100 gal D. 1301 - 1500 gal

Trade Section Flashcards

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