更多"Convection spreads a fire by（）."的相关试题:
[单项选择]Convection spreads a fire by（）.
A. heated gases flowing through ventilation syetem
B. the transfer of heat across an unobstructed space
C. burning liquids flowing into another space
D. transmitting the heat of a fire through the ships metal
[单项选择]Convection spreads a fire as a result of （）.
A. transmitting the heat of a fire through the ships metal
B. burning liquids flowing into another space
C. heated gases flowing through ventilation systems
D. the transfer of heat across an unobstructed space
[单项选择]Radiation spreads a fire by（）.
A. transferring heat across an unobstructed space
B. heated gases flowing through ventilation systems
C. burning liquids flowing into another space
D. transmitting the heat of a fire through the ship's metal
[单项选择]To prevent the spread of fire by convection you should （）.
A. remove combustibiles from direct exposure
B. cool the bulkhead around the fire
C. close all openings to the area
D. shut off electrical power
[单项选择]Convection is the principal means （） temperature is equilibrated in liquids and gases.
A. in which
B. on which
C. by which
D. from which
[单项选择]Fire dampers prevent the fire spreading through the process of （）.
A. convection
B. conduction
C. radiation
D. direct contact
[单项选择]A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.
A. a low velocity spray applicator
B. a water spray or solid stream
C. at least two spray patterns of water
D. at least 25 psi delivered pressure
[单项选择]On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）
A. Carbon dioxide
B. Water (stored pressure)
C. Dry chemical
D. Foam
[单项选择]When two fire hose teams are attacking a fire they should（）.
A. use different fire hose pressures
B. use fire hoses of different sizes
C. not attack the fire from opposite sides
D. not wear protective clothing
[单项选择]Fire dampers prevent the spread of fire by（）.
A. convection
B. conduction
C. radiation
D. direct contact
[单项选择]The fire of sodium is classified as（） fire.
A. Class A
B. Class B
C. Class C
D. Class D
[单项选择]On a class “B” fire，which portable fire extinguisher would be the LEAST desirable?（）
A. Carbon dioxide
B. Water (stored pressure)
C. Dry chemical
D. Foam
[单项选择]The fire of fuel oil is classified as（） fire.
A. Class A
B. Class B
C. Class C
D. Class D
[单项选择]The basic training in fire prevention and fire fighting should include the practical elements which should allow the trainees to acquire the ability to （）.
A. use self-contained breathing apparatus
B. use various types of portable fire extinguishers
C. effect a rescue in a smoke-filled space wearing breathing apparatus
D. All of the above
[单项选择]Fire hose couplings（）.
A. are made of bronze，brass，or soft alloy metals
B. should be painted red in order to identify hose lengths
C. are specially hardened to prevent crushing
D. should be greased frequently
[单项选择]Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.
A. when the remaining charge volume is less than 90 percent of the required VOLUME
B. at each inspection for certification
C. at each annual inspection
D. when the weight loss exceeds 10% of weight of charge
