PLUMBING (C-36) PRACTICE EXAMS WITH
ALL CORRECT & VERIFIED ANSWERS
28.0 degrees Correct answer-The boiling points at 0 degrees gas pressure in Fahrenheit are:
Ammonia (NH3):
110.50 degrees Correct answer-Carbon dioxide (C2H5CO2):
55.6 degrees Correct answer-Ethyl Chloride (C2H5CL)
21.7 degrees Correct answer-Freon (F-12) (CC12F2)
2.31
(Note: 1..433 = 2.31)
(Note: 1..31 = 0.433) Correct answer-One pound of pressure per sq. in. of water equals
______ feet of water at 62 degrees F.
0.433
(Note: 1..31 = 0.433)
(Note: 1..433 = 2.31) Correct answer-One foot of water at 62 degrees F equals ________
pounds pressure per square inch.
14.0 degrees Correct answer-Sulfur Dioxide (SO2)
10.6 degrees Correct answer-Methyl Chloride (CH3CL)
10.0 degrees Correct answer-Freezol (iso-butane) (CH3) (3CH)
27,000 grains per regeneration cycle Correct answer-What is the minimum size water softener that
may be used for a one inch water line in order to prevent pressure drop?
4 ounces
(~7 IWC) Correct answer-Gas pressures for gas systems vary widely. What is the working pressure
normally used on hot water heaters installed at individual houses.
2,000 - 300 Correct answer-No more than ______ cu. ft. of fuel gas or ______ lbs. of liquefied
petroleum gas may be stored inside.
Slotted plug core shut off valve Correct answer-What type of valve is used to shut off the main
from the service?
5" Correct answer-A gas vent connector shall have a continuous rise from the appliance to the vent
of not less than ____ per foot of length.
1/2". Correct answer-The size of the supply piping outlet for any gas appliance shall be not less
than:
-66 Correct answer-What is the specific gravity of natural gas?
,6 Correct answer-A single-wall metal flue pipe installed to serve a gas fired water heater is required
by code to have a min. clearance of _____ inches from any combustible type materials.
188 - 40 Correct answer-The melting point of propane is _______ degrees C. and the boiling point
of propane is _______ degrees C.
138 - 0.0 Correct answer-The melting point of butane is _______ degrees C. and the boiling point
of butane is _______ degrees C.
14". Correct answer-Low pressure gas piping 1/2" is installed to convey gas at pressure not to
exceed a water column of:
10,000 - 16 Correct answer-Mechanical ventilation must be provided when welding or cutting is
done where there is less than ______ cu. ft. of air per welder, where the ceiling is less than ____ ft.
high, or when working in confined quarters.
9"- 4" Correct answer-Earthquake security straps for a hot water heater shall be installed _____
from the top of the tank and ____ from the bottom.
top of boiler. Correct answer-Placement of safety valves on a boiler is on the:
1/2". Correct answer-The size of the gas supply piping outlet for a recessed oven cannot be less
than:
20 Correct answer-Oxygen cylinders must be stored at least ____ ft. from fuel gas cylinders or
combustible materials.
1-1/2"-16 gauge. Correct answer-The minimum size strap for a hot water heater is:
3 feet. Correct answer-The maximum distance from a gas appliance that the shut off valve may be
is:
18 Correct answer-Gas water heaters burning not more than 40,000 BTU's per hr. may be
connected with approved metal tubing connectors having a nominal diameter of 3/8" and an overall
length not to exceed _____ inches.
7 Correct answer-According to Code, exit terminals of mechanical draft systems must be located a
minimum of ____ feet above grade when adjacent to public walkways.
Type C vent. Correct answer-A gas vent pipe which passes through the roof of a building must be
provided with a vent cap. According to Code, it must not obstruct or reduce the effective cross-
sectional area of the vent outlet and can be used on all but a:
1200 Correct answer-__________ degrees F. is the approximate combustion point of natural gas.
6' Correct answer-Maximum length of any gas flexible connector is ______.
1/2". Correct answer-The water supply piping should be sized accordingly. Concealed pipe within a
wall going to a fixture is:
, Only A and B are applicable:
(A) The piping and equipment between the street gas main and the gas piping system inlet;
(B) Piping and equipment which is under the control and maintenance of the serving gas supplier.
Correct answer-The term "service piping" refers to which of the following?
1/2". Correct answer-The minimum size of a fixture water supply pipe for a single shower head is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a domestic dishwasher
is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a wall hydrant is:
1/2". Correct answer-The fixture supply pipe for women's restroom lavatories rated at 2 cwsfu
each is ___ size.
5'. Correct answer-Discharge from relief valves of liquefied petroleum piping systems shall be into
open air and shall be horizontally away from any opening into a building which is below such
discharge not less than:
3/4". Correct answer-The water supply piping should be sized accordingly. The first section of a
water pipe within a building is:
3/8". Correct answer-The minimum size of a fixture water supply pipe for a bidet is:
1" Correct answer-At the point where a 1/2" lavatory fixture branch joins a 3/4" urinal fixture
branch pipe, the demand increases to 14 cwsfu and the pipe increases to ___ size.
1'. Correct answer-Labels on copper tubing systems shall be permanently affixed to the tubing at
walls, floors or partitions penetrations within:
3/4". Correct answer-The water supply piping should be sized accordingly. Sillcock is:
1". Correct answer-The minimum size of a fixture water supply pipe for a flush-valve toilet is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a wall hydrant is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a flush-tank urinal is:
underground. Correct answer-Combination stop-and-waste valves are not allowed to be installed:
at the same location except where impractical. Correct answer-Where more than one gas meter is
set on a specific premises, they shall all be set:
80 Correct answer-An approved pressure-reducing valve must be installed in a water service pipe
of a building, near where the pipe enters a building, when the street pressure of the water main
providing potable water exceeds ____ pounds per sq. inch.
3/8". Correct answer-The minimum size of a fixture water supply pipe for a lavatory is:
ALL CORRECT & VERIFIED ANSWERS
28.0 degrees Correct answer-The boiling points at 0 degrees gas pressure in Fahrenheit are:
Ammonia (NH3):
110.50 degrees Correct answer-Carbon dioxide (C2H5CO2):
55.6 degrees Correct answer-Ethyl Chloride (C2H5CL)
21.7 degrees Correct answer-Freon (F-12) (CC12F2)
2.31
(Note: 1..433 = 2.31)
(Note: 1..31 = 0.433) Correct answer-One pound of pressure per sq. in. of water equals
______ feet of water at 62 degrees F.
0.433
(Note: 1..31 = 0.433)
(Note: 1..433 = 2.31) Correct answer-One foot of water at 62 degrees F equals ________
pounds pressure per square inch.
14.0 degrees Correct answer-Sulfur Dioxide (SO2)
10.6 degrees Correct answer-Methyl Chloride (CH3CL)
10.0 degrees Correct answer-Freezol (iso-butane) (CH3) (3CH)
27,000 grains per regeneration cycle Correct answer-What is the minimum size water softener that
may be used for a one inch water line in order to prevent pressure drop?
4 ounces
(~7 IWC) Correct answer-Gas pressures for gas systems vary widely. What is the working pressure
normally used on hot water heaters installed at individual houses.
2,000 - 300 Correct answer-No more than ______ cu. ft. of fuel gas or ______ lbs. of liquefied
petroleum gas may be stored inside.
Slotted plug core shut off valve Correct answer-What type of valve is used to shut off the main
from the service?
5" Correct answer-A gas vent connector shall have a continuous rise from the appliance to the vent
of not less than ____ per foot of length.
1/2". Correct answer-The size of the supply piping outlet for any gas appliance shall be not less
than:
-66 Correct answer-What is the specific gravity of natural gas?
,6 Correct answer-A single-wall metal flue pipe installed to serve a gas fired water heater is required
by code to have a min. clearance of _____ inches from any combustible type materials.
188 - 40 Correct answer-The melting point of propane is _______ degrees C. and the boiling point
of propane is _______ degrees C.
138 - 0.0 Correct answer-The melting point of butane is _______ degrees C. and the boiling point
of butane is _______ degrees C.
14". Correct answer-Low pressure gas piping 1/2" is installed to convey gas at pressure not to
exceed a water column of:
10,000 - 16 Correct answer-Mechanical ventilation must be provided when welding or cutting is
done where there is less than ______ cu. ft. of air per welder, where the ceiling is less than ____ ft.
high, or when working in confined quarters.
9"- 4" Correct answer-Earthquake security straps for a hot water heater shall be installed _____
from the top of the tank and ____ from the bottom.
top of boiler. Correct answer-Placement of safety valves on a boiler is on the:
1/2". Correct answer-The size of the gas supply piping outlet for a recessed oven cannot be less
than:
20 Correct answer-Oxygen cylinders must be stored at least ____ ft. from fuel gas cylinders or
combustible materials.
1-1/2"-16 gauge. Correct answer-The minimum size strap for a hot water heater is:
3 feet. Correct answer-The maximum distance from a gas appliance that the shut off valve may be
is:
18 Correct answer-Gas water heaters burning not more than 40,000 BTU's per hr. may be
connected with approved metal tubing connectors having a nominal diameter of 3/8" and an overall
length not to exceed _____ inches.
7 Correct answer-According to Code, exit terminals of mechanical draft systems must be located a
minimum of ____ feet above grade when adjacent to public walkways.
Type C vent. Correct answer-A gas vent pipe which passes through the roof of a building must be
provided with a vent cap. According to Code, it must not obstruct or reduce the effective cross-
sectional area of the vent outlet and can be used on all but a:
1200 Correct answer-__________ degrees F. is the approximate combustion point of natural gas.
6' Correct answer-Maximum length of any gas flexible connector is ______.
1/2". Correct answer-The water supply piping should be sized accordingly. Concealed pipe within a
wall going to a fixture is:
, Only A and B are applicable:
(A) The piping and equipment between the street gas main and the gas piping system inlet;
(B) Piping and equipment which is under the control and maintenance of the serving gas supplier.
Correct answer-The term "service piping" refers to which of the following?
1/2". Correct answer-The minimum size of a fixture water supply pipe for a single shower head is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a domestic dishwasher
is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a wall hydrant is:
1/2". Correct answer-The fixture supply pipe for women's restroom lavatories rated at 2 cwsfu
each is ___ size.
5'. Correct answer-Discharge from relief valves of liquefied petroleum piping systems shall be into
open air and shall be horizontally away from any opening into a building which is below such
discharge not less than:
3/4". Correct answer-The water supply piping should be sized accordingly. The first section of a
water pipe within a building is:
3/8". Correct answer-The minimum size of a fixture water supply pipe for a bidet is:
1" Correct answer-At the point where a 1/2" lavatory fixture branch joins a 3/4" urinal fixture
branch pipe, the demand increases to 14 cwsfu and the pipe increases to ___ size.
1'. Correct answer-Labels on copper tubing systems shall be permanently affixed to the tubing at
walls, floors or partitions penetrations within:
3/4". Correct answer-The water supply piping should be sized accordingly. Sillcock is:
1". Correct answer-The minimum size of a fixture water supply pipe for a flush-valve toilet is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a wall hydrant is:
1/2". Correct answer-The minimum size of a fixture water supply pipe for a flush-tank urinal is:
underground. Correct answer-Combination stop-and-waste valves are not allowed to be installed:
at the same location except where impractical. Correct answer-Where more than one gas meter is
set on a specific premises, they shall all be set:
80 Correct answer-An approved pressure-reducing valve must be installed in a water service pipe
of a building, near where the pipe enters a building, when the street pressure of the water main
providing potable water exceeds ____ pounds per sq. inch.
3/8". Correct answer-The minimum size of a fixture water supply pipe for a lavatory is:
