更多"When electrical equipment is involv"的相关试题:
[单项选择]A fire in electrical equipment should be extinguished by using（）.
A. salt water
B. foam
C. low-velocity fog
D. CO2
[单项选择]The fire of electrical equipment is classified as（）fire.
A. class A
B. Class B
C. Class C
D. Class D
[名词解释]电气设备（electrical equipment）
[单项选择]Before doing maintenance on electrical equipment, you should （）.
A. turn off power first
B. turn on power first
C. with a test pen in hand
D. tell C/E
[单项选择]When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.
A. check valve installed in the line
B. shut off valve at a manifold near the pump
C. quick disconnect union within ten feet of the pump
D. regulator in the line set at 125 psi
[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]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]When a fire（）at the National Exhibition, at least then priceless paintings were completely destroyed.
A. broke off
B. broke out
C. broke down
D. broke up
[单项选择]How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.
A. With gooseneck vents
B. With warning signs
C. With flame screens
D. With pressure-vacuum relief valves
[单项选择]The term flood current refers to that time when the water（）.
A. is flowing towards the land
B. is moving towards the ocean
C. level is not changing
D. level is rising because of heavy rains
[单项选择]When should a fire be ventilated?（）
A. When attacking the fire directly
B. When using a steam smothering system
C. When using the fixed CO2 system
D. All of the above
[单项选择]When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.
A. over the top of the flames
B. off a bulkhead into the fire
C. in front of the fire
D. at the base of the fire
[单项选择]When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.
A. base of the flames，moving the horn from side to side，following the flames upward as they diminish
B. top of the flaming area，moving the horn from side to side，following the flames downward as they diminish
C. center of the flaming area，moving the horn vertically from top to bottom
D. bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish
[单项选择]When approaching a fire from win ward, you should shield firefighters from the fire by using（）
A. low-velocity fog
B. high-velocity fog
C. a straight stream of water
D. foam spray
[单项选择]When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A. air from contacting the oil vapors
B. permitting re-ignition boiling of the heated oil
C. spontaneous combustion below the oil surface
D. toxic fumes from escaping to the surface
[判断题]“永远记住船上着火是最危险的”可译成：ALWAYS REMEMBER THAT FIRE IS THE GREATEST HAZARD ABOARD SHIP。
[单项选择]What method of extinguishing fire in a hatch is the best to minimize damages to the cargoes?（）.
A. Foam
B. CO2
C. Water
D. All of the above
