JIBC Fire Prevention and Safety 5 — Questions and Answers
Question 1: Which ventilation technique involves cutting openings in the roof directly above the fire to allow heat and smoke to escape vertically?
- Horizontal ventilation
- Positive pressure ventilation (PPV)
- Vertical (vertical/hydraulic) ventilation (Correct answer)
- Cross ventilation
Correct answer: Vertical (vertical/hydraulic) ventilation
Vertical ventilation removes superheated gases and smoke upward through roof openings, improving visibility and reducing flashover risk for interior crews.
Question 2: A building permit is issued for a new care facility. Under the BC Building Code, which occupancy group would this facility MOST likely fall under?
- Group A – Assembly
- Group B – Detention, Care, or Treatment (Correct answer)
- Group C – Residential
- Group F – Industrial
Correct answer: Group B – Detention, Care, or Treatment
Group B occupancies include facilities where occupants may need assistance evacuating, such as hospitals, nursing homes, and care facilities.
Question 3: When inspecting a paint storage room, an inspector finds no explosion-proof electrical fixtures. The MAIN hazard this creates is:
- Increased UV radiation exposure to workers
- An ignition source for flammable vapors that may accumulate in the space (Correct answer)
- Reduced visibility during normal operations
- Higher ambient temperatures that degrade paint quality
Correct answer: An ignition source for flammable vapors that may accumulate in the space
Standard electrical fixtures can produce sparks or arcs that ignite flammable vapors; explosion-proof fixtures are required in areas where such vapors may accumulate.
Question 4: The 'fire tetrahedron' adds which fourth element to the traditional fire triangle?
- Carbon dioxide
- Chemical chain reaction (Correct answer)
- Nitrogen
- Pressure
Correct answer: Chemical chain reaction
The fire tetrahedron adds the uninhibited chemical chain reaction to heat, fuel, and oxygen, explaining why some agents (like halon) extinguish fires chemically.
Question 5: Under the Workplace Hazardous Materials Information System (WHMIS 2015), a Safety Data Sheet (SDS) must contain how many sections?
- 8
- 12
- 16 (Correct answer)
- 20
Correct answer: 16
WHMIS 2015 (aligned with GHS) requires a standardized 16-section SDS format to ensure consistent hazard communication.
Question 6: A fire investigator determines a fire's point of origin by looking for the lowest point of char and the 'V' pattern on walls. What does the 'V' pattern primarily indicate?
- The direction the wind was blowing during the fire
- The area where suppression water caused the most damage
- The upward and outward spread of heat and combustion gases from the fire's origin (Correct answer)
- The location of accelerants poured by an arsonist
Correct answer: The upward and outward spread of heat and combustion gases from the fire's origin
The 'V' or inverted cone pattern results from buoyant hot gases and flames spreading upward and outward from the base of the fire, helping investigators locate the origin.
Question 7: In wildland-urban interface (WUI) fire prevention, 'defensible space' refers to:
- A legal boundary preventing firefighters from entering private property
- A buffer zone created around a structure by reducing flammable vegetation to slow fire spread and protect the structure (Correct answer)
- A fireproof bunker located beneath a home
- A community evacuation staging area designated by local government
Correct answer: A buffer zone created around a structure by reducing flammable vegetation to slow fire spread and protect the structure
Defensible space is a vegetation management zone around a structure that reduces fire intensity, provides safer conditions for firefighters, and increases the structure's survivability.
JIBC Fire Prevention and Safety 5
Which ventilation technique involves cutting openings in the roof directly above the fire to allow heat and smoke to escape vertically?