CMCB Firefighter II (pt.4) Exam
Questions and Answers 100%
PASS
84. To create a safe haven when a liquid propane gas truck is involved in fire, firefighters
should:
A. advance two 1-3/4" handlines from both ends of the tank.
B. let the fire burn itself out.
C. off-load the tank while cooling the tank from a safe distance.
D. evacuate all individuals for one mile in every direction.—ANSWER-D. evacuate all
individuals for one mile in every direction.
84. The tanker that is about 40 feet in length, aluminum, cylindrically shaped MC-306 that
can carry approximately 9,000 gallons is probably carrying:
A. compressed natural gas.
C. gasoline.
,B. liquefied petroleum gas.
D. jet fuel.—ANSWER-C. gasoline.
84. A DOT MC-306 tanker that is aluminum and placarded with the number 1203 is a vehicle
that is carrying:
A. compressed natural gas.
C. gasoline.
B. liquefied petroleum gas.
D. jet fuel.—ANSWER-C. gasoline.
84. Which is an appropriate action regarding an liquid propane gas tanker fire?
A. The fire streams should be directed to extinguish the flames coming from the venting
pressure relief valve.
B. Fire streams should be directed towards the vulnerable ends of the tanker truck to
prevent them from a boiling liquid expanding vapor explosion (BLEVE).
C. Crews should approach at 30 degree angles under wide fog to shut off the pressure relief
valve.
D. Care must be taken not to extinguish flames coming from a venting pressure relief
valve.—ANSWER-D. Care must be taken not to extinguish flames coming from a venting
pressure relief valve.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
,84. If a vehicle supplied by compressed natural gas (CNG) is involved in fire, firefighters
should:
A. put the fire out immediately.
B. deploy handlines to cool the engine.
C. deploy unmanned master streams.
D. allow fuel to burn off.—ANSWER-D. allow fuel to burn off.
84. If a propane cylinder is exposed to fire, the pressure relief valve:
A. could operate several times before the cylinder fails.
B. could melt shut and the cylinder will explode.
C. will close to prevent rupture of the cylinder.
D. will operate to ensure the cylinder will not rupture.—ANSWER-A. could operate several
times before the cylinder fails.
84. When cylinders are involved in fire, the best course of action is to:
A. use two 1-3/4 inch handlines to approach and turn off the valve.
B. use large amounts of water applied from a safe distance.
, C. use unmanned master streams to protect exposures while using solid streams to
approach the cylinder and shut down valve.
D. evacuate the area as the cylinder will immediately explode.—ANSWER-B. use large
amounts of water applied from a safe distance.
84. A DOT MC-331 tanker that is cylindrically shaped and painted white is probably carrying:
A. compressed natural gas.
C. gasoline.
B. liquefied petroleum gas.
D. jet fuel.—ANSWER-B. liquefied petroleum gas.
84. Fire impinging on a cylinder containing liquefied flammable gases can result in:
A. the cylinder melting under pressure.
B. the pressure relief valve closing to prevent overpressure of the cylinder.
C. a boiling liquid expanding vapor explosion (BLEVE).
D. a slow deterioration of the cylinder.—ANSWER-C. a boiling liquid expanding vapor
explosion (BLEVE).
84. Which is true regarding flammable liquid gas cylinders?
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
Questions and Answers 100%
PASS
84. To create a safe haven when a liquid propane gas truck is involved in fire, firefighters
should:
A. advance two 1-3/4" handlines from both ends of the tank.
B. let the fire burn itself out.
C. off-load the tank while cooling the tank from a safe distance.
D. evacuate all individuals for one mile in every direction.—ANSWER-D. evacuate all
individuals for one mile in every direction.
84. The tanker that is about 40 feet in length, aluminum, cylindrically shaped MC-306 that
can carry approximately 9,000 gallons is probably carrying:
A. compressed natural gas.
C. gasoline.
,B. liquefied petroleum gas.
D. jet fuel.—ANSWER-C. gasoline.
84. A DOT MC-306 tanker that is aluminum and placarded with the number 1203 is a vehicle
that is carrying:
A. compressed natural gas.
C. gasoline.
B. liquefied petroleum gas.
D. jet fuel.—ANSWER-C. gasoline.
84. Which is an appropriate action regarding an liquid propane gas tanker fire?
A. The fire streams should be directed to extinguish the flames coming from the venting
pressure relief valve.
B. Fire streams should be directed towards the vulnerable ends of the tanker truck to
prevent them from a boiling liquid expanding vapor explosion (BLEVE).
C. Crews should approach at 30 degree angles under wide fog to shut off the pressure relief
valve.
D. Care must be taken not to extinguish flames coming from a venting pressure relief
valve.—ANSWER-D. Care must be taken not to extinguish flames coming from a venting
pressure relief valve.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
,84. If a vehicle supplied by compressed natural gas (CNG) is involved in fire, firefighters
should:
A. put the fire out immediately.
B. deploy handlines to cool the engine.
C. deploy unmanned master streams.
D. allow fuel to burn off.—ANSWER-D. allow fuel to burn off.
84. If a propane cylinder is exposed to fire, the pressure relief valve:
A. could operate several times before the cylinder fails.
B. could melt shut and the cylinder will explode.
C. will close to prevent rupture of the cylinder.
D. will operate to ensure the cylinder will not rupture.—ANSWER-A. could operate several
times before the cylinder fails.
84. When cylinders are involved in fire, the best course of action is to:
A. use two 1-3/4 inch handlines to approach and turn off the valve.
B. use large amounts of water applied from a safe distance.
, C. use unmanned master streams to protect exposures while using solid streams to
approach the cylinder and shut down valve.
D. evacuate the area as the cylinder will immediately explode.—ANSWER-B. use large
amounts of water applied from a safe distance.
84. A DOT MC-331 tanker that is cylindrically shaped and painted white is probably carrying:
A. compressed natural gas.
C. gasoline.
B. liquefied petroleum gas.
D. jet fuel.—ANSWER-B. liquefied petroleum gas.
84. Fire impinging on a cylinder containing liquefied flammable gases can result in:
A. the cylinder melting under pressure.
B. the pressure relief valve closing to prevent overpressure of the cylinder.
C. a boiling liquid expanding vapor explosion (BLEVE).
D. a slow deterioration of the cylinder.—ANSWER-C. a boiling liquid expanding vapor
explosion (BLEVE).
84. Which is true regarding flammable liquid gas cylinders?
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
