[单项选择]Combustible material stored in a compartment adjacent to a compartment where there is a fire may be ignitedThis ignition can occur by （）.
A. heat convection through the adjacent bulkheads
B. combustion gases carried through the ventilation system
C. direct convection of the heat emitted by the adjacent fire
D. heat radiated from the dock or bulkhead by the adjacent fire

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[单项选择]Fires involving combustible metals are classified as （）.
A. class "A" fires
B. class "B" fires
C. class "C" fires
D. class "D" fires

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[单项选择]A combustible gas indicator meter is calibrated to read the percentage of（）.
A. vapor to oxygen
B. the flammable limit concentration
C. the autoignition concentration
D. the lower explosive limit concentration

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[单项选择]Combustible gas indicators operate by drawing an air sample into the instrument（）.
A. over an electrically heated platinum filament
B. where it is mixed with nitrogen
C. where it is ignited by a sparking device
D. where its specific gravity is measured

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[单项选择]Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.
A. flash point
B. upper explosive limit
C. lower explosive limit
D. fire point

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[单项选择]A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.
A. purifies
B. combinations
C. concentrations
D. filters

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[单项选择]A combustible gas indicator is used to determine （）.
A. if there is sufficient oxygen to support life
B. the toxicity of flammable gases or vapors
C. the amount of CO₂ present in flue gas
D. the presence of flammable gases or vapors in the air

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[单项选择]Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.
A. class A
B. class B
C. class C
D. class D

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[单项选择]Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by（）.
A. convection
B. conduction
C. radiation
D. spontaneous combustion

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[单项选择]To determine that a compartment contains sufficient oxygen to sustain life, you should use a/an （）.
A. explosimeter
B. oxygen indicator
C. fresh air indicator
D. all of the above

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[单项选择]Fire in an engine compartment is best extinguished with carbon dioxide gas (CO₂) and by（）.
A. completely closing the compartment
B. closing the compartment except for the ventilators
C. leaving the compartment open to the air
D. increasing the air flow to the compartment by blowers

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[单项选择]The stability which remains after a compartment is flooded is called（）.
A. intact stability
B. initial stability
C. immersion stability
D. damage stability

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[单项选择]An engine compartment gasoline fire requires which type of extinguisher?（）
A. Carbon dioxide
B. Dry chemical
C. Foam
D. All of the above

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[单项选择]You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.
A. sufficient oxygen to sustain human life
B. an explosive mixture in the compartment
C. a toxic atmosphere in the compartment
D. All of the above

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[单项选择]A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）
A. worn valve seats
B. worn main bearing
C. excessive valve clearance
D. weak rocker arm springs

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[单项选择]The disinfection of various compartment in a vesel by filling them with a gaseous agents to destroy rats ect.means（）.
A. fire drills
B. washing and cleaning
C. fumigation
D. quarantine

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