AZ C-37 (CR-37) PLUMBING CONTRACTOR
EXAMINATION COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
10-Point Exam Coverage Short Summary
1. Arizona contractor licensing requirements — Understand the licensing framework,
classifications, scope of work, qualifying party requirements, and contractor
responsibilities.
2. Plumbing codes and standards — Review applicable plumbing codes, adopted
standards, permits, inspections, and code-compliance principles.
3. Water supply systems — Study potable-water distribution, pipe sizing, pressure, valves,
fixtures, cross-connection control, and backflow prevention.
4. Drainage, waste, and vent systems — Understand DWV design, drainage slopes,
venting methods, cleanouts, traps, and proper connections.
5. Plumbing materials and installation — Know the characteristics and applications of
copper, PEX, CPVC, PVC, ABS, cast iron, galvanized steel, and other approved materials.
6. Fixtures and appliances — Review installation requirements for toilets, lavatories, sinks,
tubs, showers, water heaters, dishwashers, and similar plumbing equipment.
7. Water heaters and hot-water systems — Understand temperature and pressure relief
protection, expansion tanks, connections, venting, fuel considerations, and safety
requirements.
8. Specialized plumbing systems — Study gas-related plumbing interfaces, medical or
specialty systems where applicable, storm drainage, sump systems, and related
installations.
9. Jobsite safety and professional practices — Review OSHA-related safety concepts,
excavation hazards, PPE, confined spaces, ladder safety, and safe tool operation.
10. Business, estimating, and project management — Understand contracts, plans and
specifications, scheduling, estimating, change orders, documentation, lien concepts, and
quality control.
,1. Which responsibility most directly distinguishes a licensed plumbing
contractor from an individual performing minor plumbing maintenance on a
private property?
A. The contractor must comply with applicable licensing laws and perform work
within the licensed classification.
B. The contractor may ignore local permitting requirements when the project
involves residential property.
C. The contractor can perform electrical work without additional licensing
because plumbing systems often use electricity.
D. The contractor is automatically authorized to perform every construction trade
regardless of classification.
Answer: A
Rationale: A licensed contractor must operate within the scope of the applicable
license and comply with licensing, permitting, and code requirements. A plumbing
contractor is not automatically licensed for unrelated trades.
2. When preparing to perform plumbing work that requires a permit, what
should a contractor generally do before beginning regulated construction
activities?
A. Begin installation immediately and request an inspection only after all work is
concealed.
B. Obtain required permits and verify applicable plans, codes, and inspection
requirements before starting work.
C. Ask the property owner to approve the work verbally instead of obtaining
required governmental authorization.
D. Complete the work first and obtain a permit only if an inspector discovers the
project.
Answer: B
,Rationale: Required permits should generally be secured before regulated work
begins. The contractor should also verify applicable plans, codes, and inspection
procedures.
3. Why is maintaining accurate project documentation particularly important for
a plumbing contractor managing a complex construction project?
A. Documentation eliminates the need to follow plumbing codes when the project
is commercially profitable.
B. Documentation provides evidence of scope, materials, changes, inspections,
payments, and communications throughout the project.
C. Documentation allows contractors to substitute unapproved materials
whenever original materials become unavailable.
D. Documentation guarantees that every project will be completed without delays
or unexpected conditions.
Answer: B
Rationale: Good records help establish what was agreed upon, what changed,
which materials were used, and how inspections and payments were handled.
4. Which document would generally provide the most useful information about
the intended location and routing of plumbing systems within a building?
A. A plumbing plan or coordinated construction drawing
B. A manufacturer's warranty certificate
C. A contractor's vehicle registration
D. A supplier's monthly invoice
Answer: A
Rationale: Plumbing plans and coordinated construction drawings show fixture
locations, piping routes, equipment, and system details necessary for installation.
, 5. A contractor discovers that actual field conditions differ substantially from
the plumbing drawings. What is generally the most appropriate initial response?
A. Install the system exactly as drawn regardless of conflicts with actual
conditions.
B. Conceal the discrepancy so that the project schedule remains unchanged.
C. Document the conflict and coordinate with the appropriate design professional
or responsible party before proceeding.
D. Allow an unlicensed laborer to redesign the entire plumbing system without
approval.
Answer: C
Rationale: Significant field conflicts should be documented and resolved through
proper coordination rather than improvised without authorization.
6. What is the primary purpose of a plumbing system's potable-water
distribution network?
A. To transport sanitary sewage from fixtures to the public sewer
B. To distribute water suitable for intended human consumption and domestic
uses
C. To provide combustion air for fuel-burning appliances
D. To collect rainwater from roof drainage systems exclusively
Answer: B
Rationale: Potable-water systems distribute water intended for drinking, cooking,
bathing, and other approved domestic uses.
7. Which condition can most directly contribute to inadequate water pressure at
a plumbing fixture located far from the building's supply entrance?
A. Excessive pipe length combined with friction losses and insufficient available
pressure
EXAMINATION COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
10-Point Exam Coverage Short Summary
1. Arizona contractor licensing requirements — Understand the licensing framework,
classifications, scope of work, qualifying party requirements, and contractor
responsibilities.
2. Plumbing codes and standards — Review applicable plumbing codes, adopted
standards, permits, inspections, and code-compliance principles.
3. Water supply systems — Study potable-water distribution, pipe sizing, pressure, valves,
fixtures, cross-connection control, and backflow prevention.
4. Drainage, waste, and vent systems — Understand DWV design, drainage slopes,
venting methods, cleanouts, traps, and proper connections.
5. Plumbing materials and installation — Know the characteristics and applications of
copper, PEX, CPVC, PVC, ABS, cast iron, galvanized steel, and other approved materials.
6. Fixtures and appliances — Review installation requirements for toilets, lavatories, sinks,
tubs, showers, water heaters, dishwashers, and similar plumbing equipment.
7. Water heaters and hot-water systems — Understand temperature and pressure relief
protection, expansion tanks, connections, venting, fuel considerations, and safety
requirements.
8. Specialized plumbing systems — Study gas-related plumbing interfaces, medical or
specialty systems where applicable, storm drainage, sump systems, and related
installations.
9. Jobsite safety and professional practices — Review OSHA-related safety concepts,
excavation hazards, PPE, confined spaces, ladder safety, and safe tool operation.
10. Business, estimating, and project management — Understand contracts, plans and
specifications, scheduling, estimating, change orders, documentation, lien concepts, and
quality control.
,1. Which responsibility most directly distinguishes a licensed plumbing
contractor from an individual performing minor plumbing maintenance on a
private property?
A. The contractor must comply with applicable licensing laws and perform work
within the licensed classification.
B. The contractor may ignore local permitting requirements when the project
involves residential property.
C. The contractor can perform electrical work without additional licensing
because plumbing systems often use electricity.
D. The contractor is automatically authorized to perform every construction trade
regardless of classification.
Answer: A
Rationale: A licensed contractor must operate within the scope of the applicable
license and comply with licensing, permitting, and code requirements. A plumbing
contractor is not automatically licensed for unrelated trades.
2. When preparing to perform plumbing work that requires a permit, what
should a contractor generally do before beginning regulated construction
activities?
A. Begin installation immediately and request an inspection only after all work is
concealed.
B. Obtain required permits and verify applicable plans, codes, and inspection
requirements before starting work.
C. Ask the property owner to approve the work verbally instead of obtaining
required governmental authorization.
D. Complete the work first and obtain a permit only if an inspector discovers the
project.
Answer: B
,Rationale: Required permits should generally be secured before regulated work
begins. The contractor should also verify applicable plans, codes, and inspection
procedures.
3. Why is maintaining accurate project documentation particularly important for
a plumbing contractor managing a complex construction project?
A. Documentation eliminates the need to follow plumbing codes when the project
is commercially profitable.
B. Documentation provides evidence of scope, materials, changes, inspections,
payments, and communications throughout the project.
C. Documentation allows contractors to substitute unapproved materials
whenever original materials become unavailable.
D. Documentation guarantees that every project will be completed without delays
or unexpected conditions.
Answer: B
Rationale: Good records help establish what was agreed upon, what changed,
which materials were used, and how inspections and payments were handled.
4. Which document would generally provide the most useful information about
the intended location and routing of plumbing systems within a building?
A. A plumbing plan or coordinated construction drawing
B. A manufacturer's warranty certificate
C. A contractor's vehicle registration
D. A supplier's monthly invoice
Answer: A
Rationale: Plumbing plans and coordinated construction drawings show fixture
locations, piping routes, equipment, and system details necessary for installation.
, 5. A contractor discovers that actual field conditions differ substantially from
the plumbing drawings. What is generally the most appropriate initial response?
A. Install the system exactly as drawn regardless of conflicts with actual
conditions.
B. Conceal the discrepancy so that the project schedule remains unchanged.
C. Document the conflict and coordinate with the appropriate design professional
or responsible party before proceeding.
D. Allow an unlicensed laborer to redesign the entire plumbing system without
approval.
Answer: C
Rationale: Significant field conflicts should be documented and resolved through
proper coordination rather than improvised without authorization.
6. What is the primary purpose of a plumbing system's potable-water
distribution network?
A. To transport sanitary sewage from fixtures to the public sewer
B. To distribute water suitable for intended human consumption and domestic
uses
C. To provide combustion air for fuel-burning appliances
D. To collect rainwater from roof drainage systems exclusively
Answer: B
Rationale: Potable-water systems distribute water intended for drinking, cooking,
bathing, and other approved domestic uses.
7. Which condition can most directly contribute to inadequate water pressure at
a plumbing fixture located far from the building's supply entrance?
A. Excessive pipe length combined with friction losses and insufficient available
pressure
