Practice
Plumbing Exam
Answers
at bottom of this exam
Name:
________________________________________________________________________
Date:
_________________________
Score:
_________________________
Carefully read each question and then circle the best answer.
1. A stack vent handling 125 dfu’s with a developed length of 35 feet shall be ____
inches minimum diameter.
2
2.5
3
4
2. When the developed length of hot water piping
from the source of hot water supply to the farthest fixture exceeds_____ feet,
the pipe must be insulated.
50
65
75
100
3. A
vent accepting the discharge of 6 dfu shall
be a minimum size of____ inches.
1-1/2
2
2-1/2
3
4. An indirect waste
pipe that exceeds _____ feet in total developed horizontal length must be
trapped.
1.5
2
3
4
5. Bedpan washers and clinical sinks shall
connect to the drainage and vent system in accordance with the requirements of
a _______.
lavatory
water
closet
bidet
service
sink
6. A
factory bathroom with 4 water closets (1.6 gpf), 7
urinals (1gpf), six lavatories and a floor drain has how many drainage fixture
units.
25
27
38
31
7. All
plastic pipe and fittings shall be third party certified as conforming to ___?
ASME-56
ASTM
888-05
ASSE
1002-90
ANS/NSF
14
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8. A
booster pump must be equipped with a low-pressure switch that cuts the pump off
when a positive pressure of ____ psi or less occurs on the suction side of the
pump.
10
5
20
40
9. Hot water faucets, except tub/shower mixing
valves, on a fixture shall be____.
on
the right
on
the left
either
left or right
labled
"hot"
10. The capacity of a grease trap connected to an
appliance discharging 12 gpm shall be minimum
____pounds.
12
18
20
24
11. The minimum
diameter of an individual vent totaling 45 feet developed length and serving a
horizontal drain branch, handling 20 dfu’s is ____
inches.
1.5
2
2.5
3
12. The
size of the letters of pipe identification for a 2 inch pipe shall be _____ inches..5
.5
.75
1
1.25
13. According to Table
604.3 the required water pressure for a residential dishwasher is ___ psi.
25
8
15
20
14. The minimum size of a dry vent connected to a
wet vent discharging 5 dfu is_____.
1-1/2
2
2-1/2
3
15. The minimum diameter of a horizontal drainage
pipe handling 96 dfu’s is _____ inches.
3
4
5
6
16. Plastic water supply pipe must be tested
by_______.
50
psi of air or greater
50
psi of water or greater
either
a or b
neither
a or be
17. Where rock is encountered in trenching, the
rock shall be removed to a minimum of _____ inches below the installation level
of the bottom of the pipe.
3
4
5
6
18. Commercial laundries shall be equipped
with an interceptor that prevents the passage of solids ____ or larger into the
public sewer system.
.25
.5
.37
.75
19. PVC
pipe shall be horizontally supported at a maximum of ____ feet intervals.
4
6
8
10
20. Plastic floor flanges use to connect
floor outlet plumbing fixtures shall not be less than _____inch thick.
.125
.187
.25
.50
21. A circuit vent shall vent a maximum of _______ traps.
2
4
6
8
22. The strainer openings of a shower waste
strainer shall be a minimum of ___inches.
1/8
1/4
3/8
1/2
23. The minimum size fixture water supply pipe for
a domestic dishwasher is______.
1/2"
3/4"
3/8"
1-1/4"
24. A
Light industrial business with 150 female employees must have a minimum of ____
water closets available.
5
4
3
2
25. Studs,
in load bearing walls may be bored no greater than ___% when doubled.
40
50
60
70
Answer Sheet
1. b.
Table 916.1
2. d.
607.2
3. c.
Table 909.3
4. b.
802.2
5. b.
713.2
6. c.
Table 709.1
7. d.
303.3
8. a.
605.5.5
9. b.
607.4
10. d.
Table 1003.3.4.1
11. b.
Table 710.1(1), 40 foot rule 916.2
12. b.
Table 608.3
13. b.
Table 604.3
14. c.
909.2 plus Table 090.3
15. b.
Table 710.1(2)
16. b.
312.5
17. a.
306.2.2
18. b.
1003.6
19. a.
Table 308.5
20. c. 405.4.1
21. d.
202 definition of circuit vent
22. b.
417.3
23. c.
Table 604.5
24. a. Table 403.1
25. c.
307.2.3