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Journeyman and Master Plumbing Exam Question Bank- Questions and Answers
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Journeyman and Master Plumbing Exam Question Bank- Questions and Answers
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Journeyman and Master Plumbing Exam QuestionBank- Questions and Answers
What minimum size pipe is required for a vertical wet vent? CORRECT ANS-2 inches
What is the minimum slope for a vent for an island sink? CORRECT ANS-1/4
A combination waste and vent drain requires a vent. The vent pipe is required to be what
minimum percent of the cross-sectional area of therein pipe served? CORRECT ANS-50%
In a combination waste and vent system, a fixture with a 2 inch tail piece must use a trap at
least _____________ in size CORRECT ANS-four inches
The gauge of drawn brass "p" traps that may be used on fixtures discharging domestic sewage
but excluding urinals CORRECT ANS-17 gauge
Brass tubing traps shall be CORRECT ANS-exposed and readily accessible
On an emergency floor drain, which of the following is to be installed? CORRECT ANS-
Backwater valve
A grease interceptor installed in a commercial building is allowed to receive the waste from all
of the following except a CORRECT ANS-food waste grinder
What maximum length is allowed for a 2" trap arm? CORRECT ANS-5 feet 0 inches
The developed length between the trap of a water closet and its vent shall not exceed
CORRECT ANS-6 feet
,What is a corrugated line connecting a gas valve to an appliance called? CORRECT ANS-An
appliance connector
What minimum amount of time is required to test a low pressure gas piping system?
CORRECT ANS-10 minutes
Pipe material for gas piping installations shall not be CORRECT ANS-cast-iron
In sizing roof drains, ___________________ percent of a vertical wall which diverts rain water
to a roof must be added to the projected roof area when calculating the required storm
drainage piping. CORRECT ANS-50
On a gas line, a pipe to catch condensation is called a CORRECT ANS-drip
Gas piping supplying more than one building on any one lot shall be equipped with
____________________ and installed outside. CORRECT ANS-separate shut-off valves
What other inert gas can you use to test or flush a medical line? CORRECT ANS-nitrogen
Leaks in gas piping shall be located by applying ______________________ to the exterior of the
piping. CORRECT ANS-soapy water
Given: A gas-pipe pressure test reveals that a malleable iron elbow has a sand hole. What repair
procedure is required? CORRECT ANS-Replace the fitting
What is the minimum pressure for testing low pressure gas piping systems? CORRECT ANS-3
psi
What is the minimum test on a gas line 2 psig? CORRECT ANS-10
, The hourly gas volume for a gas-burning appliance is determined by the
______________________. CORRECT ANS-demand rating of the appliance
What is the minimum size gas pipe outlet is allowed for any appliance? CORRECT ANS-1/2"
All of the following information is necessary to calculate gas pipe sizes except the CORRECT
ANS-type of appliance
A gas yard light that has an input rating of 1,500 BTU per hour requires a volume of 1.5 cubic
feet per hour. Assume the heating value of the fuel gas is 1,100 BTU per cubic foot and pipe
length is 8 feet. The minimum pipe size is __________________ inch. CORRECT ANS-1/2 inch
A 65 foot gas piping branch in a home is required to supply a range, furnace, water heater, and
log igniter having a maximum total demand of 74 cubic feet of gas per hour. The pipe size shall
be a minimum of _______________ inch. CORRECT ANS-3/4
What is the purpose for a 2 units supply system for a medical air system? CORRECT ANS-
Continuous maintenance to assure no down time occurring
How do you transfer medical gas pipe to the job site? CORRECT ANS-Cleaned and capped
Which of the following safety devices is not necessary for medical gas systems? CORRECT
ANS-Vandal proof casing.
Why do medical gas systems require two supply sources? CORRECT ANS-To ensure against
dangerous down time of the system.
What is the minimum distance between supply water pipes and sewer pipes? CORRECT ANS-
12 inches
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