更多"A fire of escaping liquefied flamma"的相关试题:
[单项选择]A fire of escaping liquefied flammable gas is best extinguished by（）.
A. cooling the gas below the ignition point
B. cutting off the supply of oxygen
C. stopping the flow of gas
D. interrupting the chain reaction
[单项选择]If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）
A. Make periodic inspections of bilges
B. Keep the barge under constant surveillance
C. Have a properly certificated tankerman or at least one licensed officer on board the towing vessel
D. Verify ullage readings
[单项选择]Fires in escaping flammable gas are quickly brought under control by（）
A. stopping the flow of gas
B. reducing the chemical chain reaction
C. increasing the oxygen supply
D. cooling below the autoignition point
[单项选择]What normally helps in detecting escaping gas? （）
A. Running hand along pipe
B. Red flame
C. Odor
D. Increase the line pressure
[单项选择]A large oil fire is best extinguished with（）
A. soda acid
B. foam
C. CO2
D. sand
[单项选择]The valve best suited for throttling gas or liquid flow in a pipeline is the（）.
A. gate valve
B. globe valve
C. check valve
D. plug cock
[单项选择]Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
A. closing the compartment except for the ventilators
B. completely closing the compartment
C. leaving the compartment open to the air
D. increasing the air flow to the compartment by blowers
[单项选择]The best method of extinguishing a class A fire is to （）.
A. remove oxygen from the area
B. smother fire with foam
C. smother fire with CO2
D. cool fuel below ignition temperature
[单项选择]What is best suited for fighting a fire in a ballast control room?（）
A. Automatic sprinkler system
B. Steam smothering system
C. Dry chemical system
D. Carbon dioxide system
[单项选择]The BEST method of applying foam to a fire is to（）.
A. spray directly on the base of the fire
B. flow the foam down a nearby vertical surface
C. sweep the fire with the foam
D. spray directly on the surface of the fire
[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]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]Hot gas defrosting uses the hot gas from （） to defrost the evaporator.
A. starting air bottles
B. diesel engines
C. boilers
D. refrigeration compressors
[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]Fire dampers prevent the spread of fire by（）.
A. conduction
B. convection
C. radiation
D. direct contact
