PLUMBING (C-36) PRACTICE EXAMS
QUESTIONS WITH CORRECT ANSWERS
Quick-closing valves - Answer-Under normal conditions, a water hammer arrestor is
required whenever certain valves are used, which of the following valves are of a type to
require such a device?
Only B and C tests are approved:
(A) a minimum of 10 psi for 15 minutes.;
(B) at the discretion of the administrative authority to specify the pressure and duration
of time. - Answer-The administrative authority shall inspect the test of fuel gas piping
installations, and the pressure required is:
the maximum hourly rating specified by the manufacturer. - Answer-The hourly volume
of gas required at each piping outlet shall be taken as not less than:
3/4". - Answer-The minimum size of any gas piping outlet for a mobile home shall be;
1/2". - Answer-The minimum size of a fixture water supply pipe for a bathtub is:
1/2". - Answer-The minimum size of a fixture water supply for a kitchen sink is:
1/2". - Answer-The fixture supply pipe for women's restroom lavatories rated at 2 cwsfu
each is ___ size.
3/4". - Answer-The water supply piping should be sized accordingly. Pipe for more than
three fixtures or a branch is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a combination sink
and tray is:
1/2". - Answer-The water supply piping should be sized accordingly. Fixture branch pipe
is:
3/4". - Answer-The minimum size of a fixture water supply for a flush-valve urinal is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a hose bibb is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a laundry tray with up
to 3 compartments is:
6'. - Answer-Labels shall be spaced throughout copper tubing systems at maximum
intervals of:
,black letters on a yellow field. - Answer-Copper tubing systems shall be identified with
an appropriate label to indicate the piping system conveys fuel gas. Labels shall be:
Only A and C apply:
(A) welded;
(B) flanged. - Answer-All joints in fuel gas piping shall be:
identified and labeled to show the fixture being served. - Answer-When valves are
installed in locations which are not adjacent to the fixture or appliance being served, the
valves must be:
gate valve (also known as a fullway valve) - Answer-Of the following valves, the one
code-approved for a building water service line is the:
25 - Answer-Flow pressure ranges from 8 psi for faucets and tank-type water closets to
___ psi for certain models of flushometer valve.
Flanged - Answer-Which of the following types of joints are not used to join copper
tubing?
3/4". - Answer-The water supply piping should be sized accordingly. Pipe extending
from the water main to water meter is:
1/2". - Answer-The minimum size of a fixture water supply for a service sink is:
one half inch diameter. - Answer-The minimum size of the supply piping outlet for any
gas appliance shall not be less than:
the I.D. - Answer-Ferrous pipe (iron and steel) is measured by:
3 - Answer-How many grades of wall thickness does the hard temper tubing come in?
14 - Answer-How many threads per inch does a 1/2" pipe have?
White - Answer-Name the color used to denote brass pipe.
L - Answer-Name the medium wall thickness of copper tubing.
To change the direction of a soil or waste pipe from horizontal to vertical usually short
quarter bends are used. - Answer-Which of the following is LEAST true?
Rigid stationary pipe clamps - Answer-What types of supports are used for PVC piping?
Which of the following is LEAST true?
1136 sq. in. - Answer-The minimum floor area of a shower stall must be:
, Where a trap can not be vented - Answer-The use of a deep seal trap is required in
which of the following situations?
Never - Answer-Should a damper be installed in the vent to all gas water heaters as a
matter of safety?
where those structures allow combustible construction. - Answer-ABS or PVC drainage
installations are limited to residential construction:
PVC schedule 80. - Answer-Plastic piping from a septic tank to a drainfield located
under paving shall be:
Vitrified clay pipe is ordered by the piece. - Answer-Which of the following is MOST
FALSE when working with vitrified clay pipe?
Drainage pipe fittings are the same as water supply fittings. - Answer-Which of the
following is LEAST true?
2 inches - Answer-What is the smallest diameter of pipe that should be used for floor
drain waste lines?
Black - Answer-Name the color used to denote copper pipe.
4 hours - Answer-If the maximum test pressure is to be maintained at 160 psi, what is
the minimum curing time for cemented joints on 2" PVC schedule 40 pipe with ambient
temperature at 50 degrees F.?
DWV. - Answer-Copper tubing for both above and under ground drainage and vent
piping shall have a weight of not less than that of copper drainage tube type:
Green - Answer-What color is the stripe of the thickest walled (Type K) copper tubing?
open floor drain. - Answer-A refrigerator must be drained into a/an:
Yellow - Answer-Type DWV drain copper tubing is marked with what color identification
stripe?
a water pressure regulator is installed. - Answer-A pressure relief valve is required
when:
80 - Answer-The minimum schedule recommended for plastic pipe to be threaded is:
horizontal to vertical. - Answer-A sanitary tee may be used to change the direction from:
It's more durable - Answer-What is the main reason for using thick wall as opposed to
thin wall copper pipe?
QUESTIONS WITH CORRECT ANSWERS
Quick-closing valves - Answer-Under normal conditions, a water hammer arrestor is
required whenever certain valves are used, which of the following valves are of a type to
require such a device?
Only B and C tests are approved:
(A) a minimum of 10 psi for 15 minutes.;
(B) at the discretion of the administrative authority to specify the pressure and duration
of time. - Answer-The administrative authority shall inspect the test of fuel gas piping
installations, and the pressure required is:
the maximum hourly rating specified by the manufacturer. - Answer-The hourly volume
of gas required at each piping outlet shall be taken as not less than:
3/4". - Answer-The minimum size of any gas piping outlet for a mobile home shall be;
1/2". - Answer-The minimum size of a fixture water supply pipe for a bathtub is:
1/2". - Answer-The minimum size of a fixture water supply for a kitchen sink is:
1/2". - Answer-The fixture supply pipe for women's restroom lavatories rated at 2 cwsfu
each is ___ size.
3/4". - Answer-The water supply piping should be sized accordingly. Pipe for more than
three fixtures or a branch is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a combination sink
and tray is:
1/2". - Answer-The water supply piping should be sized accordingly. Fixture branch pipe
is:
3/4". - Answer-The minimum size of a fixture water supply for a flush-valve urinal is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a hose bibb is:
1/2". - Answer-The minimum size of a fixture water supply pipe for a laundry tray with up
to 3 compartments is:
6'. - Answer-Labels shall be spaced throughout copper tubing systems at maximum
intervals of:
,black letters on a yellow field. - Answer-Copper tubing systems shall be identified with
an appropriate label to indicate the piping system conveys fuel gas. Labels shall be:
Only A and C apply:
(A) welded;
(B) flanged. - Answer-All joints in fuel gas piping shall be:
identified and labeled to show the fixture being served. - Answer-When valves are
installed in locations which are not adjacent to the fixture or appliance being served, the
valves must be:
gate valve (also known as a fullway valve) - Answer-Of the following valves, the one
code-approved for a building water service line is the:
25 - Answer-Flow pressure ranges from 8 psi for faucets and tank-type water closets to
___ psi for certain models of flushometer valve.
Flanged - Answer-Which of the following types of joints are not used to join copper
tubing?
3/4". - Answer-The water supply piping should be sized accordingly. Pipe extending
from the water main to water meter is:
1/2". - Answer-The minimum size of a fixture water supply for a service sink is:
one half inch diameter. - Answer-The minimum size of the supply piping outlet for any
gas appliance shall not be less than:
the I.D. - Answer-Ferrous pipe (iron and steel) is measured by:
3 - Answer-How many grades of wall thickness does the hard temper tubing come in?
14 - Answer-How many threads per inch does a 1/2" pipe have?
White - Answer-Name the color used to denote brass pipe.
L - Answer-Name the medium wall thickness of copper tubing.
To change the direction of a soil or waste pipe from horizontal to vertical usually short
quarter bends are used. - Answer-Which of the following is LEAST true?
Rigid stationary pipe clamps - Answer-What types of supports are used for PVC piping?
Which of the following is LEAST true?
1136 sq. in. - Answer-The minimum floor area of a shower stall must be:
, Where a trap can not be vented - Answer-The use of a deep seal trap is required in
which of the following situations?
Never - Answer-Should a damper be installed in the vent to all gas water heaters as a
matter of safety?
where those structures allow combustible construction. - Answer-ABS or PVC drainage
installations are limited to residential construction:
PVC schedule 80. - Answer-Plastic piping from a septic tank to a drainfield located
under paving shall be:
Vitrified clay pipe is ordered by the piece. - Answer-Which of the following is MOST
FALSE when working with vitrified clay pipe?
Drainage pipe fittings are the same as water supply fittings. - Answer-Which of the
following is LEAST true?
2 inches - Answer-What is the smallest diameter of pipe that should be used for floor
drain waste lines?
Black - Answer-Name the color used to denote copper pipe.
4 hours - Answer-If the maximum test pressure is to be maintained at 160 psi, what is
the minimum curing time for cemented joints on 2" PVC schedule 40 pipe with ambient
temperature at 50 degrees F.?
DWV. - Answer-Copper tubing for both above and under ground drainage and vent
piping shall have a weight of not less than that of copper drainage tube type:
Green - Answer-What color is the stripe of the thickest walled (Type K) copper tubing?
open floor drain. - Answer-A refrigerator must be drained into a/an:
Yellow - Answer-Type DWV drain copper tubing is marked with what color identification
stripe?
a water pressure regulator is installed. - Answer-A pressure relief valve is required
when:
80 - Answer-The minimum schedule recommended for plastic pipe to be threaded is:
horizontal to vertical. - Answer-A sanitary tee may be used to change the direction from:
It's more durable - Answer-What is the main reason for using thick wall as opposed to
thin wall copper pipe?
