ARIZONA PLUMBING EXAM C-37 (SET 1) | FROM QUESTION
TO PERFECTION| STUDY WITH CONFIDENCE!
Course Code:
Course Title:
Programme:
Academic Year: 2026/2027
Duration: 2 Hours
Total Marks: 70%
Candidate Instructions:
1) Write your Registration Number on every answer booklet used.
2) Answer ALL questions in Section A and ANY TWO (2) questions in Section B.
3) Read each question carefully before answering.
4) Begin each question on a new page.
5) The marks for each question are indicated in brackets.
6) This paper consists of several printed pages, including this page.
7) Ensure your copy is complete before the examination begins.
8) Unauthorized materials and communication with other candidates are not permitted.
Turn Over.
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, Backflow due to siphonage occurs: Answer: When negative pressure developes
12 inches of water in a water column has what pressure on the bottom? Answer: .433 psi
What size pipe is used to feed a fire hydrant on private property? Answer: 6 inch
The last support hanger on a fire sprinkler branch on 1 inch nominal pipe size may be no more
than _____ from the end. Answer: 36 inches
Strainer plates on drain inlets shall be designed and installed so that no opening is greater than
___ in the least dimension. Answer: 1/2 inch
What type of pipe joint connection is not permitted in gas line piping? Answer: compression
What is the number of square inches of the sidewall area of a seepage pit that measures 6 feet
across and 14 feet deep? Answer: 37,981.44 square inches
According to OSHA, ladders (or steps) are required in all trenches or ditches at _____ feet or
more in depth for an adequate means of exit. Answer: 4
The sidewalls of a septic tank shall extend no less than ______ inches above the liquid depth.
Answer: 9
Which of the following valve type shall be installed at each building water supply line?
Answer: Full open gate
Which of the following is required of a clean out cap located in a walkway? Answer: Shall have
a countersunk plug
The last support hanger on a fire sprinkler branch of 1 1/4 inch nominal pipe size may be no
more than _____ from the end. Answer: 48 inches
What minimum height can a LP gas furnace be installed in a public garage? Answer: 1 feet
above the garage door.
What is the name for the inside bottom elevation of a sewer line or drain pipe? Answer: invert
Polybutylene pipe may be used in hot water piping of hydronic heating systems water when the
water in the pipe does not exceed: Answer: 180 degrees at 100 psi
The failure of a contractor to notify Blue Stake prior to excavation may liable him responsible
for damages and subject to how much of a fine? Answer: $5,000.00
The distance between 2 pipes running in parallel is called the ______. Answer: Spread
The Corporation Commission has assigned color codes to identify the location of underground
facilities. What color identifies gas distribution and transmission? Answer: high visibility safety
yellow
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
TO PERFECTION| STUDY WITH CONFIDENCE!
Course Code:
Course Title:
Programme:
Academic Year: 2026/2027
Duration: 2 Hours
Total Marks: 70%
Candidate Instructions:
1) Write your Registration Number on every answer booklet used.
2) Answer ALL questions in Section A and ANY TWO (2) questions in Section B.
3) Read each question carefully before answering.
4) Begin each question on a new page.
5) The marks for each question are indicated in brackets.
6) This paper consists of several printed pages, including this page.
7) Ensure your copy is complete before the examination begins.
8) Unauthorized materials and communication with other candidates are not permitted.
Turn Over.
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, Backflow due to siphonage occurs: Answer: When negative pressure developes
12 inches of water in a water column has what pressure on the bottom? Answer: .433 psi
What size pipe is used to feed a fire hydrant on private property? Answer: 6 inch
The last support hanger on a fire sprinkler branch on 1 inch nominal pipe size may be no more
than _____ from the end. Answer: 36 inches
Strainer plates on drain inlets shall be designed and installed so that no opening is greater than
___ in the least dimension. Answer: 1/2 inch
What type of pipe joint connection is not permitted in gas line piping? Answer: compression
What is the number of square inches of the sidewall area of a seepage pit that measures 6 feet
across and 14 feet deep? Answer: 37,981.44 square inches
According to OSHA, ladders (or steps) are required in all trenches or ditches at _____ feet or
more in depth for an adequate means of exit. Answer: 4
The sidewalls of a septic tank shall extend no less than ______ inches above the liquid depth.
Answer: 9
Which of the following valve type shall be installed at each building water supply line?
Answer: Full open gate
Which of the following is required of a clean out cap located in a walkway? Answer: Shall have
a countersunk plug
The last support hanger on a fire sprinkler branch of 1 1/4 inch nominal pipe size may be no
more than _____ from the end. Answer: 48 inches
What minimum height can a LP gas furnace be installed in a public garage? Answer: 1 feet
above the garage door.
What is the name for the inside bottom elevation of a sewer line or drain pipe? Answer: invert
Polybutylene pipe may be used in hot water piping of hydronic heating systems water when the
water in the pipe does not exceed: Answer: 180 degrees at 100 psi
The failure of a contractor to notify Blue Stake prior to excavation may liable him responsible
for damages and subject to how much of a fine? Answer: $5,000.00
The distance between 2 pipes running in parallel is called the ______. Answer: Spread
The Corporation Commission has assigned color codes to identify the location of underground
facilities. What color identifies gas distribution and transmission? Answer: high visibility safety
yellow
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
