CR-37 PLUMBING FULL SET | 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
, What is the minimum over dig for a seepage pit to determine base of seepage pit? Answer: 5'
Blue stake markings are good for what maximum period of time? Answer: 15 Days
A common vent vents which of the following? Answer: Two Traps
What is the internal volume of 3" pipe 20' long? Answer: 1696 cu inches
No vent is required for a waste drain if under what length? Answer: 5'
How can fuel gas Iron piping not be jpined Answer: Compression fittings
a 12 inch water column of water exerts how much pressure at the bottom of the column?
Answer: .43psi
Floor drains shall have what minimum opening? Answer: 2"
What backflow device is used for a boiler water supply system? Answer: backflow preventer
with intermediate atmospheric vents
AZDEQ Requires a permit if disturbing what minimum amount of ground during construction?
Answer: 1 acre
A willful violation of an OSHA rule carries what minimum fine? Answer: $70,000
A vertical vent stacks with an offset at 45 degrees or less have their length calculated as?
Answer: a straight pipe
Fuel gas pipping installed at what distance from the edge of a wall stud does not need a nailing
or protective plate Answer: over 1 1/2"
What defines vacuum Answer: Pressure less than atmospheric
What is the minimum vertical separation between a vitrified clay pipe sewer line crossing under
a water supply? Answer: 12"
What is the minimum trap size for a single lavatory Answer: 1 1/4"
What is the minimum diameter pipe for supply to a kitchen sink fixture Answer: 1/2"
Metallic fuel gas piping cannot be joined using which of the following? Answer: compression
fittings
What is the minimum cover of gravel for distribution piping Answer: 2"
Who is responsible for the final set up of boiler controls on a newly installed boiler system?
Answer: installer
What is the minimum number of threads cut on any end of the fuel gas pipe Answer: 10
What piping is used for the heat exchanger for a ground based hydronic system? Answer:
polyethylene
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
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
, What is the minimum over dig for a seepage pit to determine base of seepage pit? Answer: 5'
Blue stake markings are good for what maximum period of time? Answer: 15 Days
A common vent vents which of the following? Answer: Two Traps
What is the internal volume of 3" pipe 20' long? Answer: 1696 cu inches
No vent is required for a waste drain if under what length? Answer: 5'
How can fuel gas Iron piping not be jpined Answer: Compression fittings
a 12 inch water column of water exerts how much pressure at the bottom of the column?
Answer: .43psi
Floor drains shall have what minimum opening? Answer: 2"
What backflow device is used for a boiler water supply system? Answer: backflow preventer
with intermediate atmospheric vents
AZDEQ Requires a permit if disturbing what minimum amount of ground during construction?
Answer: 1 acre
A willful violation of an OSHA rule carries what minimum fine? Answer: $70,000
A vertical vent stacks with an offset at 45 degrees or less have their length calculated as?
Answer: a straight pipe
Fuel gas pipping installed at what distance from the edge of a wall stud does not need a nailing
or protective plate Answer: over 1 1/2"
What defines vacuum Answer: Pressure less than atmospheric
What is the minimum vertical separation between a vitrified clay pipe sewer line crossing under
a water supply? Answer: 12"
What is the minimum trap size for a single lavatory Answer: 1 1/4"
What is the minimum diameter pipe for supply to a kitchen sink fixture Answer: 1/2"
Metallic fuel gas piping cannot be joined using which of the following? Answer: compression
fittings
What is the minimum cover of gravel for distribution piping Answer: 2"
Who is responsible for the final set up of boiler controls on a newly installed boiler system?
Answer: installer
What is the minimum number of threads cut on any end of the fuel gas pipe Answer: 10
What piping is used for the heat exchanger for a ground based hydronic system? Answer:
polyethylene
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
