ARIZONA PLUMBING CONTRACTOR
LICENSE STUDY GUIDE COMPLETE C-
37 & CR-37 PSI TEST BANK PDF
This premium, verified test bank is specifically engineered for
professionals targeting the Arizona C-37 and CR-37 Plumbing
Contractor License. Every multiple-choice question features an
italicized correct answer and a bolded, detailed rationale mapped
to the latest International Plumbing Code (IPC) and Arizona ROC
regulatory standards. Designed to maximize your study efficiency,
this comprehensive guide guarantees high retention and a
passing score on your first attempt.
1. What is the minimum slope required for a
horizontal drainage pipe with a diameter of 2-1/2
inches or less?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Answer: C
Rationale: The IPC mandates that horizontal
drainage piping 2-1/2 inches or smaller must
maintain a minimum slope of 1/4 inch per foot to
ensure proper liquid velocity and solid transport.
,2. Which type of backflow preventer is required
for a commercial boiler connection with
chemical treatment?
A. Atmospheric vacuum breaker
B. Double check valve assembly
C. Reduced pressure principle backflow preventer
(RPZ)
D. Barometric loop
Answer: C
Rationale: Chemical additives create a high-
hazard, toxic scenario. An RPZ assembly
provides the highest level of protection against
both backpressure and backsiphonage in high-
hazard applications.
3. What is the maximum distance a 1-1/2 inch
trap can be placed from its vent connection?
A. 3 feet
B. 5 feet
C. 6 feet
D. 8 feet
Answer: C
Rationale: Per standard IPC fixture trap distance
tables, a 1-1/2 inch trap arm has a maximum
allowable distance of 6 feet to prevent the
siphonage of the trap seal.
,4. Gas piping installed underground beneath a
building must be routed inside which of the
following?
A. Schedule 40 PVC conduit
B. A ventilated schedule 40 sleeve or conduit vented
to the outside
C. Heavy-wall copper tubing without joints
D. Solid concrete trench
Answer: B
Rationale: The IFGC mandates that gas piping
under a building must be encased in a conduit
that is sealed and vented to the outer air to
safely isolate and exhaust any potential gas
leaks.
5. What is the minimum required depth for water
service pipes installed underground in Arizona,
measured from top of pipe to finished grade?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: B
Rationale: Water service lines must be installed
at least 12 inches deep, or 6 inches below the
, local frost line, whichever is deeper. In Arizona,
the 12-inch baseline is standard.
6. What is the absolute minimum cleanout
clearance required for piping 2 inches or
smaller?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: C
Rationale: Cleanouts on pipes 2 inches and
smaller require at least 18 inches of clearance in
front of the opening to allow proper rodding tool
manipulation.
7. A water heater temperature and pressure
(T&P) relief valve discharge pipe must terminate
not more than how many inches above the floor
or waste receptor?
A. 2 inches
B. 6 inches
C. 12 inches
D. 18 inches
Answer: B
Rationale: To prevent severe scalding and
LICENSE STUDY GUIDE COMPLETE C-
37 & CR-37 PSI TEST BANK PDF
This premium, verified test bank is specifically engineered for
professionals targeting the Arizona C-37 and CR-37 Plumbing
Contractor License. Every multiple-choice question features an
italicized correct answer and a bolded, detailed rationale mapped
to the latest International Plumbing Code (IPC) and Arizona ROC
regulatory standards. Designed to maximize your study efficiency,
this comprehensive guide guarantees high retention and a
passing score on your first attempt.
1. What is the minimum slope required for a
horizontal drainage pipe with a diameter of 2-1/2
inches or less?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Answer: C
Rationale: The IPC mandates that horizontal
drainage piping 2-1/2 inches or smaller must
maintain a minimum slope of 1/4 inch per foot to
ensure proper liquid velocity and solid transport.
,2. Which type of backflow preventer is required
for a commercial boiler connection with
chemical treatment?
A. Atmospheric vacuum breaker
B. Double check valve assembly
C. Reduced pressure principle backflow preventer
(RPZ)
D. Barometric loop
Answer: C
Rationale: Chemical additives create a high-
hazard, toxic scenario. An RPZ assembly
provides the highest level of protection against
both backpressure and backsiphonage in high-
hazard applications.
3. What is the maximum distance a 1-1/2 inch
trap can be placed from its vent connection?
A. 3 feet
B. 5 feet
C. 6 feet
D. 8 feet
Answer: C
Rationale: Per standard IPC fixture trap distance
tables, a 1-1/2 inch trap arm has a maximum
allowable distance of 6 feet to prevent the
siphonage of the trap seal.
,4. Gas piping installed underground beneath a
building must be routed inside which of the
following?
A. Schedule 40 PVC conduit
B. A ventilated schedule 40 sleeve or conduit vented
to the outside
C. Heavy-wall copper tubing without joints
D. Solid concrete trench
Answer: B
Rationale: The IFGC mandates that gas piping
under a building must be encased in a conduit
that is sealed and vented to the outer air to
safely isolate and exhaust any potential gas
leaks.
5. What is the minimum required depth for water
service pipes installed underground in Arizona,
measured from top of pipe to finished grade?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: B
Rationale: Water service lines must be installed
at least 12 inches deep, or 6 inches below the
, local frost line, whichever is deeper. In Arizona,
the 12-inch baseline is standard.
6. What is the absolute minimum cleanout
clearance required for piping 2 inches or
smaller?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Answer: C
Rationale: Cleanouts on pipes 2 inches and
smaller require at least 18 inches of clearance in
front of the opening to allow proper rodding tool
manipulation.
7. A water heater temperature and pressure
(T&P) relief valve discharge pipe must terminate
not more than how many inches above the floor
or waste receptor?
A. 2 inches
B. 6 inches
C. 12 inches
D. 18 inches
Answer: B
Rationale: To prevent severe scalding and
