Journeyman and Master Plumbing Exam
Question Bank LATEST UPDATE 2024-2025 225
230 QUESTIONS AND VERIFIED CORRECT
ANSWERS GUARANTEED A+
"Existing work" is defined to be a plumbing system or any part thereof which -
CORRECT ANSWER: has been installed prior to the effective date of the code.
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 ANSWER:
3/4
A backflow prevention device does to bear a "critical level" marking. Which part of the
device constitutes the critical level? - CORRECT ANSWER: the bottom
A bathtub spout with an effective opening of 1 inch in diameter is not affected by the
nearest sidewall. What minimum distance is required for the tub filler spouts air gap. -
CORRECT ANSWER: 2 inches
A building sewer cleanout shall be installed for each appropriate change of direction of
more than - CORRECT ANSWER: 135 degrees
A building sewer shall be buried at least ________ inches below grade - CORRECT
ANSWER: 12
A cleanout which has direct access without the necessity of removing any panel or door
is defined to be - CORRECT ANSWER: readily accessible
,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
ANSWER: 50%
A combination waste and vent system may be installed on a
_______________________ piping system. - CORRECT ANSWER: horizontal
A flushometer valve shall have an approved vacuum breaker installed to work in
conjunction with the valve. The vacuum breaker is required to be located - CORRECT
ANSWER: on the discharge side of the flushometer
A full flow non-restricting valve must be installed in the water distribution system on the
_____________________ - CORRECT ANSWER: discharge side of the meter
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 ANSWER: 1/2 inch
A grease interceptor installed in a commercial building is allowed to receive the waste
from all of the following except a - CORRECT ANSWER: food waste grinder
A horizontal drain does not serve a sink or urinal. A cleanout may be installed from the
upper terminal of a horizontal drain if the drain is less than what maximum length? -
CORRECT ANSWER: 5 feet
A horizontal pipe is any pipe or fitting which is installed in a horizontal position or which
makes an angle of less than _________ degrees with the horizontal. - CORRECT
ANSWER: 45
A mall renovation is to be done in 6 days at 8 hours a day. The work order is for 2
journeyman plumbers at $215 an hour for both men. The customer then decides he
, wants the job completed in 5 ten hour days instead. How much is the difference in
costs? - CORRECT ANSWER: $3225
A permit is required for the following except _______________________. - CORRECT
ANSWER: replacing fixtures
A pipe which makes an angle of not more than 45 degrees with the horizontal is
considered - CORRECT ANSWER: horizontal
A prefabricated gas riser inserted with plastic pipe, shall be wrapped to a point at least a
minimum of _________ inches. - CORRECT ANSWER: 6
A pressure gage is placed at a water meter to measure the available water pressure
over a twenty-four hour period. The water piping system for the building shall be
designed for - CORRECT ANSWER: the minimum gage pressure available
A pressure regulator shall be installed when the local water supply exceeds what
maximum pressure? - CORRECT ANSWER: 80 psi
A solidly formed sub-base is required so as to pitch shower pan linings to weep holes in
the sub-drain with a fall of ________________. - CORRECT ANSWER: 1/4 inch per
foot
A test for shower receptors shall be accomplished by - CORRECT ANSWER: filling to
the level of the rough threshold
A trap arm is that portion of a fixture drain between the trap and the
_________________________________. - CORRECT ANSWER: vent which serves it
A vent connecting a soil waste stack to a vent stack to prevent pressure changes. -
CORRECT ANSWER: yoke vent
Question Bank LATEST UPDATE 2024-2025 225
230 QUESTIONS AND VERIFIED CORRECT
ANSWERS GUARANTEED A+
"Existing work" is defined to be a plumbing system or any part thereof which -
CORRECT ANSWER: has been installed prior to the effective date of the code.
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 ANSWER:
3/4
A backflow prevention device does to bear a "critical level" marking. Which part of the
device constitutes the critical level? - CORRECT ANSWER: the bottom
A bathtub spout with an effective opening of 1 inch in diameter is not affected by the
nearest sidewall. What minimum distance is required for the tub filler spouts air gap. -
CORRECT ANSWER: 2 inches
A building sewer cleanout shall be installed for each appropriate change of direction of
more than - CORRECT ANSWER: 135 degrees
A building sewer shall be buried at least ________ inches below grade - CORRECT
ANSWER: 12
A cleanout which has direct access without the necessity of removing any panel or door
is defined to be - CORRECT ANSWER: readily accessible
,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
ANSWER: 50%
A combination waste and vent system may be installed on a
_______________________ piping system. - CORRECT ANSWER: horizontal
A flushometer valve shall have an approved vacuum breaker installed to work in
conjunction with the valve. The vacuum breaker is required to be located - CORRECT
ANSWER: on the discharge side of the flushometer
A full flow non-restricting valve must be installed in the water distribution system on the
_____________________ - CORRECT ANSWER: discharge side of the meter
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 ANSWER: 1/2 inch
A grease interceptor installed in a commercial building is allowed to receive the waste
from all of the following except a - CORRECT ANSWER: food waste grinder
A horizontal drain does not serve a sink or urinal. A cleanout may be installed from the
upper terminal of a horizontal drain if the drain is less than what maximum length? -
CORRECT ANSWER: 5 feet
A horizontal pipe is any pipe or fitting which is installed in a horizontal position or which
makes an angle of less than _________ degrees with the horizontal. - CORRECT
ANSWER: 45
A mall renovation is to be done in 6 days at 8 hours a day. The work order is for 2
journeyman plumbers at $215 an hour for both men. The customer then decides he
, wants the job completed in 5 ten hour days instead. How much is the difference in
costs? - CORRECT ANSWER: $3225
A permit is required for the following except _______________________. - CORRECT
ANSWER: replacing fixtures
A pipe which makes an angle of not more than 45 degrees with the horizontal is
considered - CORRECT ANSWER: horizontal
A prefabricated gas riser inserted with plastic pipe, shall be wrapped to a point at least a
minimum of _________ inches. - CORRECT ANSWER: 6
A pressure gage is placed at a water meter to measure the available water pressure
over a twenty-four hour period. The water piping system for the building shall be
designed for - CORRECT ANSWER: the minimum gage pressure available
A pressure regulator shall be installed when the local water supply exceeds what
maximum pressure? - CORRECT ANSWER: 80 psi
A solidly formed sub-base is required so as to pitch shower pan linings to weep holes in
the sub-drain with a fall of ________________. - CORRECT ANSWER: 1/4 inch per
foot
A test for shower receptors shall be accomplished by - CORRECT ANSWER: filling to
the level of the rough threshold
A trap arm is that portion of a fixture drain between the trap and the
_________________________________. - CORRECT ANSWER: vent which serves it
A vent connecting a soil waste stack to a vent stack to prevent pressure changes. -
CORRECT ANSWER: yoke vent
