更多"All portable fine extinguishers mus"的相关试题:
[单项选择]All portable fire extinguishers must be capable of being（）.
A. carried by hand to a fire
B. carried or rolled to a fire
C. recharged in the field
D. used on class "B" fires
[单项选择]Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.
A. only when fully loaded
B. if one or more tanks are full
C. when transferring cargo
D. only when the barge is being towed
[单项选择]The soda-acid portable extinguishers must be discharged and refilled （）.
A. every six months
B. every year
C. every one and half year
D. every two years
[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
[单项选择]Which types of portable fire extinguishers are designed for use on electrical fires?（）
A. Dry chemical and carbon dioxide
B. Foam (stored pressure) and soda-acid
C. Carbon dioxide and foam (stored pressure)
D. Dry chemical and soda-acid
[单项选择]Portable foam type fire extinguishers are most effective on（）.
A. mattress fires
B. oil fires
C. wood fires
D. All of the above
[单项选择]Foam-type portable fire extinguishers are more usefull in combating fires involving（）.
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Foam-type portable fire extinguishers are most useful in combating fires involving（）.
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
A. the CO2 being inhaled by personnel
B. reflash of burning liquids
C. vapor condensation on the extinguisher
D. the discharge causing a static spark
[单项选择]ECDIS should be capable of（）all chart information necessary for safe and efficient navigation originated.
A. Exhibiting
B. Existing
C. Demonstrating
D. Displaying
[单项选择]The auxiliary steering gear must be capable of being brought speedily into operation and be able to put the rudder over from 15 degrees on one side to 15 degrees on the other side in no more than （） with the ship at its deepest service draught and running ahead at the greater of one half of the maximum service speed or （）.
A. 28 seconds；7 knots
B. 28 seconds；14 knots
C. 60 seconds；7 knots
D. 60 seconds；14 knots
[单项选择]The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than （） of the total bilge pumping capacity.
A. one-third
B. two-thirds
C. one-fourth
D. two-fourths
[单项选择]The GMDSS must combine all various subsystems, because（）.
A. they all have different limitations with respect to coverage
B. they all have different limitations in the technology they use
C. different systems apply to different ships
D. all of above
[单项选择]Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.
A. must be displayed when day signals are being used
B. must be displayed when moored to a pier
C. may be extinguished at night on open waters when no other vessels are in the area
D. may be displayed during daylight
[单项选择]ECDIS must be able to perform all of the following EXCEPT（）.
A. determine true bearing and distance between two geographical points
B. determine magnetic compass deviation
C. transform a local datum to the WGS-'84 datum
D. convert "graphical coordinates" to "display coordinates"
[单项选择]All entries in the official logbook must be signed by the master and（）.
A. the union representative
B. the person aboat whom the entry concerns
C. no one else
D. one other crew member
