plumbing test guides sample questions
TRANSCRIPT
1. A lavatory needs at least what flow rate? a. .5 gpmb. 1 gpmc. 2 gpmd. 10 gpme. None of the above
2. What is the minimum drain size for a toilet? a. 1 inchb. 2 inchesc. 3 inchesd. 4 inchese. None of the above
3. A lavatory drain tailpiece has what diameter? a. 1 1/8 inchb. 1 1/4 inchc. 1 3/4 inchd. 2 1/4 inches
4. A ________________is used to stop gases from getting into a building. a. Ball Valveb. Gaskettc. P-Trapd. Quick Tee Adaptere. None of the above
5. What type of piping sends water through a hot water heater? a. Supplyb. Water Transferc. Diverterd. Manometere. None of the above
6. A _______ size drain is needed for a shower stall. a. 1 1/2 inchb. 2 inchesc. 3 inchesd. 4 inchese. None of the above
7. What size drain is required for a one piece tub/shower? a. 1 inchb. 1 1/4 inch
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c. 1 1/2 inchd. 2 inchese. None of the above
8. A __________________ is used to prevent bends or folds when working with soft copper piping.
a. chrome supportb. mounting partitionc. bending springd. bulkhead fittinge. None of the above
9. A ________________ is used to connect copper with galvanized pipe. a. push fit connectorb. dialectric unionc. couplingd. nipplee. None of the above
10. The minimum trap size of a bidet is _______________. a. 1 1/4 inchb. 1 1/2 inchc. 1 3/4 inchd. 2 inchese. None of the above
11. A kitchen sink needs what size P-trap? a. 1 1/2 inchb. 1 3/4 inchc. 2 inchesd. 2 1/4 inchese. None of the above
12. A _______________ is used to connect a P-trap to a drain. a. compressionb. trap adapterc. couplingd. valvee. None of the above
13. The maximum spacing of a horizontal hanger for ½ inch CPVC piping is ________________.
a. 1 footb. 2 feetc. 3 feetd. 4 feet
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e. None of the above
14. A ______________ size drain is needed for a clothes washer. a. 1 inchb. 1 1/2 inchc. 2 inchesd. 2 1/2 inchese. None of the above
15. A four bedroom house should have a septic tank that holds how many gallons? a. 300b. 750c. 900d. 1200e. None of the above
16. Water enters a residence at what pressure? a. 30 - 40 psib. 50 - 60 psic. 70 - 80 psid. 85 - 90 psie. None of the above
17. An "A Valve" is a manual ____________________. a. cold water valveb. hot water valvec. air valved. septic valvee. gas valve
18. An air lock is caused by _____________________. a. an air bubbleb. grease build-upc. damaged piped. low water pressuree. None of the above
19. A ___________________ is a sacrificial rod installed in a water heater to protect the tank from corrosion.
a. dip tubeb. alpha rodc. anode rodd. insulation tubee. None of the above
20. Barlow's Formula is expressed as _________________________. a. P = D x t
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b. P =3t ÷ Dc. P = 5St x Dd. P = 2St ÷ De. None of the above
21. Which of the following results with friction loss? a. Loss of sealb. Loss of pressurec. Loss of suctiond. Loss of ventilatione. None of the above
22. Hard water is ______________________. a. frozen waterb. processed water with no dissolved mineralsc. natural water with dissolved mineralsd. natural water with no dissolved mineralse. None of the above
23. The most common minerals in hard water are Calcium and Magnesium. TrueFalse
24. Soft water has _______________________. a. less than 1 gpgb. 1 - 3.5 gpgc. 3.5 – 7 gpgd. 7 – 10 gpge. over 10 gpg
25. Vibrating pipes are most likely caused by ____________________. a. foundation settlingb. high water pressurec. low water pressured. a small leak drawing air into the pipese. loose fittings
26. What type of fittiings should be used on an island vent and what order should be used to make a return bend under the drain board?
a. A 45 degree, 90 degree, 45 degree and 90 degree bendb. Four 45 degree bendsc. Two 90 degree bendsd. A 45 degree, 90 degree and 45 degree bend
27. A project uses 360 feet of 3 1/2 inch pipe. A 3 1/2 inch pipe has 9 times the capacity of a 1 1/2 inch pipe. How many feet of 1 1/2 inch pipe are needed in an equivalent project?
a. 60 feetb. 1550 feet
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c. 2840 feetd. 3240 feet
Plumber Practice Test 1
1. A three compartment sink is one example of a ____________ fixture.
o Ternary
o Combination
o Multiple
2. A ____________ is used to remove excess water that has accumulated in a home's basement.
o Sewage pump
o Effluent pump
o Sump pump
3. The minimum size of a water service is __________.
o 1/2"
o 3/4"
o 1"
4. Polybutylene piping should never come into contact with the following:
o Petroleum based materials
o Caulk
o Copper
o
5. HWT is a common abbreviation for a:
o Water heater
o Hot water faucet
o Water holding tank
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6. A duel check backflow preventer should be installed:
o With a strainer installed ahead of the inlet
o With a union solely on the inlet
o With a union on the inlet and on the outlet, and a shut off valve close to the inlet
7. A ______________ is a sacrificial rod that is installed in a water heater to protect the tank from any possible corrosion, and to extend the tank's life.
o Anti-corrosion rod
o Anode rod
o Hot water rod
o All of the above
8. Gray water is a type of waste water that comes from:
o Toilets
o Sinks, showers, and bathtubs
o Toilets and garbage disposals
9. A negative pressure that can cause backflow is known as:
o Reverse siphonage
o Reverse flow
o Back siphonage
10. What type of fitting is needed to join copper with galvanized piping?
o Dialectric union
o Solder joint
o Coupling
11. What sized P-Trap is needed for a kitchen sink?
o 1 1/2"
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o 2"
o 1 3/4"
12. What device prevents gas from entering a building?
o Back flow preventer
o P-Trap
o Anti-syphon valve
o
13. The two plumbing systems found in a house are:
o Water supply and VWD
o Water supply and WDV
o Water supply and DWV
14. What type of piping sends water through a hot water heater?
o Supply
o Hot water pipe
o DWV
15. House water lines can either dump into a ___________ or ___________.
o Septic system or public sewer system
o Septic system or sump pump
o Public sewer system or the closest river
Plumber Practice Test 2
1. Valves, piping, and fittings for oxygen service, according to plumbing code,
o Should be cleaned in a warm solution of sodium carbonate
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o Do not need to be cleaned prior to installation
o Should be cleaned thoroughly with a solution of gasoline or kerosene
2. Gas room heaters installed in hallways in homes for the elderly:
o Must be the vented type
o Should not have a projecting flue box
o May be unvented
3. Water pipe sizing procedure is based upon:
o Loss or gain in static pressure
o The loss of pressure or friction through a water meter
o A system of pressure losses or requirements
4. Which of the following materials is used to make a threaded joint between galvanized steel piping and copper tubing?
o Dresser coupling
o Galvanized extension piece
o Brass male adapter
5. This is the term for the shutoff valve found between a faucet and water pipe. The outlet creates a 90° angle with the faucet, and the inlet hooks up to the water supply pipe in the wall.
o Angle stop
o Anode rod
o Stop valve
6. This is the term for a decorative metal trim shield or flange located underneath a faucet handle. It covers the hole in the wall or fixture as well as the faucet stem.
o Dove tail
o Escutcheon
o Fluer
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7. You are instructed to cut a triangular opening into a wall. Once cut, he triangular opening forms one 30-60 right triangle. The longest side of the triangle measures 10' 0". The shortest side will measure approximately ____ ft.
o 4
o 5
o 8
8. 135 cubic ft of water weighs _______ lbs. Choose the closest answer.
o 7,580
o 7,980.4
o 8,437.5
9. If there is a pressure of 30 psi at street level, how high will the pressure lift water contained in a 2 in. vertical water pipe? Choose the closest answer.
o 69.12'
o 73.10'
o 68.2'
10. Calculate the pressure in water at a 150m depth.
o P= 1675 Kpa
o P= 1470 Kpa
o P= 1575 Kpa
11. A pressure gauge on a non-pressurized holding tank reads 24.3 Kpa. Find out how many meters of water are in the tank.
o Depth= 2.48 m
o Depth= 3.48 m
o Depth= 1.48 m
12. The specific gravity of a certain type of oil is 0.8. What is the mass of 1 litre of the oil?
o 0.8 Kg
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o 0.16 Kg
o 0.9 Kg
13. If 600 ft of piping weighs 900 lbs, 140 ft of like piping will weigh _____ lbs. Choose the closest answer.
o 211
o 217
o 180
14. A 60 gallon water heater weighs 52.5 lbs when it is empty and ________ lbs when it is full. Choose the closest answer.
o 585
o 553
o 501
15. The inner dimensions of a grease interceptor measure 9' 0" long, 4' 6" wide, 5' 0" deep, with a 20% free board. What, then, is the liquid capacity of the interceptor in gallons? Choose the closest answer.
o 1,150.25
o 1,430.40
o 1,211.76
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