Which of the following drain pipes is typically used below grade?
A)
Copper
B)
Galvanized steel
C)
Cast iron
D)
Clay correct answer: The answer
... [Show More] is CLAY. Clay drain pipes are typically used below grade.
Common problems with sinks and basins include all of the following except
A)
excess pressure.
B)
rust.
C)
cross connections.
D)
leaks. correct answer: The answer is EXCESS PRESSURE. Excess pressure is not a common problem with sinks and basins.
What is the component that introduces cold water near the bottom of a gas-fired water heater tank? correct answer: The answer is THE DIP TUBE. The dip tube introduces cold water near the bottom of gas-fired and oil-fired water heater tanks
Pipe size should always increase as you move downstream and more fixtures join in.
True
False correct answer: The answer is TRUE. Pipe size should always increase as you move downstream and more fixtures join in.
Vertical pipes at ends of runs are one method of preventing water hammer.
True
False correct answer: The statement is TRUE. Water hammer can be corrected by installing vertical pipes, at the ends of hot and cold runs, that extend up at least 12 inches beyond any fixture.
A tile lip for a bathtub provides correct answer: The answer is PROVIDES A SUPPORT POINT FOR THE TUB TO THE STRUCTURE. A tile lip for a bathtub provides a support point for the tub to the structure.
An energy cutoff in a water heater replaces correct answer: The answer is THE TEMPERATURE FUNCTION OF THE TPR VALVE. The energy cutoff in a water heater replaces the temperature function of the temperature/pressure relief valve.
Galvanized iron or steel drain piping shall not be installed
A)
in crawl spaces.
B)
as stacks (vertical pipes) that serve as waste and vent stacks.
C)
in the ground.
D)
in an attic. correct answer: The answer is IN THE GROUND. Galvanized iron or steel drain piping shall not be installed in the ground
The most common problem with plumbing fixtures is
A)
poor flow.
B)
inoperative isolating valves.
C)
poor pressure.
D)
leaks. correct answer: The answer is LEAKS. The most common problem with plumbing fixtures is leaks.
Sweating toilets
A)
should be fed with hot water.
B)
are worse if the toilet runs continuously.
C)
will rust the flush mechanism and flush valve.
D)
are unusual. correct answer: The answer is ARE WORSE IF THE TOILET RUNS CONTINUOUSLY. Sweating toilets are worse if the toilet runs continuously.
What is the typical vent size on a sewage ejector pump? correct answer: The answer is 2 INCHES. The most common vent size on a sewage ejector pump is 2 inches.
What is the minimum recommended height of a plumbing vent stack above the roof? correct answer: The answer is 6 INCHES. The minimum recommended height of a plumbing vent stack above the roof is 6 inches.
Which of the following statements about fan-assisted gas water heaters is not true?
A)
They do not need a chimney
B)
They are high-efficiency.
C)
They typically have an automatic ignition system and a blower controlled by a pressure switch.
D)
They use lots of dilution air from the house. correct answer: The answer is THEY ARE HIGH-EFFICIENCY. Fan-assisted gas water heaters are not high-efficiency systems.
Whirlpool baths are also called correct answer: The answer is HYDRO-MASSAGE BATHTUBS. Whirlpool baths are also called hydro-massage bathtubs.
Pressure balancing valves
A)
are used with pressure regulators.
B)
prevent cross connections.
C)
protect against scalding at showers.
D)
are backflow preventers. correct answer: The answer is PROTECT AGAINST SCALDING AT SHOWERS. Pressure balancing valves protect against scalding at showers.
Polybutylene supply piping should not be closer than 18 inches to a water heater.
True
False correct answer: The statement is TRUE. Polybutylene connections should be at least 18 inches from water heaters.
The most common cross connection on a bathtub is
A)
a tub drain interconnected with the cold water supply.
B)
a faulty shower diverter.
C)
a tub fill spout below the tub flood rim.
D)
a pressure balancing faucet set. correct answer: The answer is A TUB FILL SPOUT BELOW THE TUB FLOOD RIM. The most common cross connection on a bathtub is a tub fill spout below the tub flood rim.
Which of the following is not a common material used for water entry piping?
A)
Copper
B)
Welded steel pipe
C)
Polyethylene plastic
D)
CPVC plastic correct answer: The answer is WELDED STEEL PIPE. Welded steel is not commonly used for water entry piping.
Why are island sinks difficult to vent? correct answer: The answer is WE DON'T WANT A VENT PIPE RUNNING UP THROUGH THE CENTER OF THE KITCHEN. Island sinks are difficult to vent because people don't want a vent pipe running up through the center of the kitchen.
All of the following indicate leaking traps except
A)
slow-draining fixtures.
B)
rusting of cleanout plugs.
C)
water damage on the floor or cabinetry below the trap.
D)
staining or streaking on the trap correct answer: The answer is SLOW DRAINING FIXTURES. Slow draining fixtures do not indicate leaking traps.
Trap problems include all of the following except
A)
slip joints.
B)
double trapping.
C)
missing.
D)
leaking. correct answer: The answer is SLIP JOINTS. Slip joints are not a trap problem.
The supply water piping diameter inside houses should be at least
A)
½ inch.
B)
¾ inch.
C)
1 inch.
D)
¼ inch. correct answer: The answer is ½ INCH. The supply water piping diameter inside houses should be at least ½ inch.
What is the minimum width needed on both sides of the center line for a toilet installation? correct answer: The answer is 15 INCHES. Good practice calls for toilets to have 15 inches on both sides of the center line of the toilet as clear space.
The water service line diameter from the street to new houses should be at least correct answer: The answer is ¾ INCH. The water service line diameter from the street to the house in new construction should be at least ¾ inch.
Which of the following fixtures does not require a trap?
A)
Toilets
B)
Basins
C)
Bathtubs
D)
Bidets correct answer: The answer is TOILETS. Toilets do not require a trap. [Show Less]