HAWAII FIRE PROTECTION CONTRACTOR EXAM —
C-20 150 Original Practice Questions, Correct Answers &
Detailed Rationales | 2026/2027 Preparation
1. Which Hawaii contractor classification is specifically designated for fire protection
work?
A. C-15a
B. C-20
C. C-13
D. C-20a
Answer: B. C-20
RATIONALE: Hawaii identifies C-20 as the Fire Protection Contractor classification.
2. What does the C-20 classification generally authorize?
A. Installation of plumbing systems only
B. Installation of electrical wiring only
C. Layout and installation of approved fire-prevention and protective systems
D. Installation of elevators only
Answer: C. Layout and installation of approved fire-prevention and protective systems
RATIONALE: Hawaii's official classification description includes approved fire-prevention
and protective systems and their associated mechanical apparatus, devices, piping, and
equipment.
3. Which classification is separately identified for fire repressant systems?
A. C-20a
B. C-15
C. C-16
D. C-13
Answer: A. C-20a
RATIONALE: Hawaii lists C-20a as the Fire Repressant Systems Contractor classification.
,4. Which organization administers Hawaii contractor examinations?
A. PSI Services, LLC
B. OSHA
C. NFPA
D. FEMA
Answer: A. PSI Services, LLC
RATIONALE: Hawaii's Contractors License Board states that contractor examinations have
been administered by PSI Services, LLC since January 2023.
5. After receiving approval to take a Hawaii contractor examination, what does the
applicant receive?
A. An automatic contractor license
B. An examination approval letter
C. A building permit
D. A fire marshal certificate
Answer: B. An examination approval letter
RATIONALE: The approval letter identifies the examination(s) the applicant is eligible to
take and provides information for registration.
6. How long does an applicant generally have to pass the required examination after
becoming eligible?
A. 30 days
B. 90 days
C. Six months
D. Two years
Answer: C. Six months
RATIONALE: Hawaii's Contractors License Board states that applicants must pass the
examination(s) within six months or reapply.
,7. What is the primary purpose of a fire sprinkler system?
A. Provide building ventilation
B. Detect and suppress/control fire at its early stage
C. Supply domestic drinking water
D. Provide emergency lighting
Answer: B. Detect and suppress/control fire at its early stage
RATIONALE: Automatic sprinkler systems are designed to respond to heat from fire and
discharge water to control or suppress the fire.
8. What activates a typical automatic sprinkler head?
A. Smoke concentration alone
B. Heat reaching the sprinkler's operating temperature
C. Loss of electrical power
D. Opening of a fire door
Answer: B. Heat reaching the sprinkler's operating temperature
RATIONALE: Conventional automatic sprinklers operate individually when sufficient heat
activates their heat-sensitive element.
9. Why do individual sprinkler heads generally activate independently?
A. To minimize unnecessary water discharge
B. To increase water consumption
C. To activate every sprinkler simultaneously
D. To disable the alarm system
Answer: A. To minimize unnecessary water discharge
RATIONALE: Sprinkler systems are designed so that only sprinklers exposed to sufficient
heat generally activate.
10. What is the purpose of a sprinkler control valve?
, A. Measure room temperature
B. Control water supply to a sprinkler system or section
C. Generate electrical power
D. Detect smoke
Answer: B. Control water supply to a sprinkler system or section
RATIONALE: Control valves regulate and isolate portions of the sprinkler water supply.
11. Why should a sprinkler control valve normally remain in its required operating
position?
A. To ensure water is available when needed
B. To prevent all water flow
C. To increase building temperature
D. To disable supervisory monitoring
Answer: A. To ensure water is available when needed
RATIONALE: An improperly closed control valve can disable the fire protection system.
12. What is a sprinkler riser?
A. A primary vertical assembly connecting portions of a sprinkler system
B. A fire extinguisher
C. A smoke detector
D. A fire door
Answer: A. A primary vertical assembly connecting portions of a sprinkler system
RATIONALE: The riser is a major component of the sprinkler piping assembly and
commonly contains valves, gauges, and other equipment.
13. What is the purpose of a sprinkler alarm valve?
A. Control or supervise water flow and initiate an alarm condition as designed
B. Supply drinking water
C. Increase electrical voltage
D. Replace every sprinkler head
C-20 150 Original Practice Questions, Correct Answers &
Detailed Rationales | 2026/2027 Preparation
1. Which Hawaii contractor classification is specifically designated for fire protection
work?
A. C-15a
B. C-20
C. C-13
D. C-20a
Answer: B. C-20
RATIONALE: Hawaii identifies C-20 as the Fire Protection Contractor classification.
2. What does the C-20 classification generally authorize?
A. Installation of plumbing systems only
B. Installation of electrical wiring only
C. Layout and installation of approved fire-prevention and protective systems
D. Installation of elevators only
Answer: C. Layout and installation of approved fire-prevention and protective systems
RATIONALE: Hawaii's official classification description includes approved fire-prevention
and protective systems and their associated mechanical apparatus, devices, piping, and
equipment.
3. Which classification is separately identified for fire repressant systems?
A. C-20a
B. C-15
C. C-16
D. C-13
Answer: A. C-20a
RATIONALE: Hawaii lists C-20a as the Fire Repressant Systems Contractor classification.
,4. Which organization administers Hawaii contractor examinations?
A. PSI Services, LLC
B. OSHA
C. NFPA
D. FEMA
Answer: A. PSI Services, LLC
RATIONALE: Hawaii's Contractors License Board states that contractor examinations have
been administered by PSI Services, LLC since January 2023.
5. After receiving approval to take a Hawaii contractor examination, what does the
applicant receive?
A. An automatic contractor license
B. An examination approval letter
C. A building permit
D. A fire marshal certificate
Answer: B. An examination approval letter
RATIONALE: The approval letter identifies the examination(s) the applicant is eligible to
take and provides information for registration.
6. How long does an applicant generally have to pass the required examination after
becoming eligible?
A. 30 days
B. 90 days
C. Six months
D. Two years
Answer: C. Six months
RATIONALE: Hawaii's Contractors License Board states that applicants must pass the
examination(s) within six months or reapply.
,7. What is the primary purpose of a fire sprinkler system?
A. Provide building ventilation
B. Detect and suppress/control fire at its early stage
C. Supply domestic drinking water
D. Provide emergency lighting
Answer: B. Detect and suppress/control fire at its early stage
RATIONALE: Automatic sprinkler systems are designed to respond to heat from fire and
discharge water to control or suppress the fire.
8. What activates a typical automatic sprinkler head?
A. Smoke concentration alone
B. Heat reaching the sprinkler's operating temperature
C. Loss of electrical power
D. Opening of a fire door
Answer: B. Heat reaching the sprinkler's operating temperature
RATIONALE: Conventional automatic sprinklers operate individually when sufficient heat
activates their heat-sensitive element.
9. Why do individual sprinkler heads generally activate independently?
A. To minimize unnecessary water discharge
B. To increase water consumption
C. To activate every sprinkler simultaneously
D. To disable the alarm system
Answer: A. To minimize unnecessary water discharge
RATIONALE: Sprinkler systems are designed so that only sprinklers exposed to sufficient
heat generally activate.
10. What is the purpose of a sprinkler control valve?
, A. Measure room temperature
B. Control water supply to a sprinkler system or section
C. Generate electrical power
D. Detect smoke
Answer: B. Control water supply to a sprinkler system or section
RATIONALE: Control valves regulate and isolate portions of the sprinkler water supply.
11. Why should a sprinkler control valve normally remain in its required operating
position?
A. To ensure water is available when needed
B. To prevent all water flow
C. To increase building temperature
D. To disable supervisory monitoring
Answer: A. To ensure water is available when needed
RATIONALE: An improperly closed control valve can disable the fire protection system.
12. What is a sprinkler riser?
A. A primary vertical assembly connecting portions of a sprinkler system
B. A fire extinguisher
C. A smoke detector
D. A fire door
Answer: A. A primary vertical assembly connecting portions of a sprinkler system
RATIONALE: The riser is a major component of the sprinkler piping assembly and
commonly contains valves, gauges, and other equipment.
13. What is the purpose of a sprinkler alarm valve?
A. Control or supervise water flow and initiate an alarm condition as designed
B. Supply drinking water
C. Increase electrical voltage
D. Replace every sprinkler head
