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单选题
When used to fight fire，carbon dioxide（）.
A
is effective if used promptly on an oil fire
B
has a greater cooling effect than water
C
is lighter than air
D
is harmless to cargo and crew
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考题
Portable carbon dioxide fire extinguishers should be sent ashore to be rechargedA.when the remaining charge volume is less than 90 percent of the required volumeB.at each inspection for certificationC.at each annual inspectionD.when the weight loss exceeds 10% of weight of charge
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In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
考题
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．A.Forming a cloud cover over the flamesB.Directing the gas at the base of the flames in a slow sweeping motionC.Discharging the carbon dioxide into the heart of the flamesD.Bouncing the discharge off an adjacent bulkhead just above the burning surface
考题
______, as the chemical extinguisher agent, should be used for an electric fire.A.dry chemical or foamB.foam or soda acidC.carbon dioxide or foamD.carbon dioxide or dry chemical
考题
单选题A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.A
Batten down the engine roomB
start the fire pumpC
apply carbon dioxide to the fireD
shut off the fuel supply
考题
填空题Glucose can be completely broken down into carbon dioxide and water when oxygen is present in the process called aerobic respiration.____
考题
单选题The discharge from a carbon dioxide fire extinguisher should be directed（）.A
at the base of the flamesB
at the center of the flamesC
to the lee side of the flamesD
over the tops of the flames
考题
单选题Flames from small leaks of LFG may be extinguished by（）.A
utilizing carbon dioxide or dry chemical fire extinguishersB
utilizing soda and acid fire extinguishersC
blowing the flames outD
letting it burn itself out
考题
单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.A
Class A and class BB
Class B and class CC
Class A and class CD
Class C, class D, and class E
考题
单选题Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to（）.A
flashing pointB
combustion pointC
auto-ignition pointD
lower explosive limit
考题
单选题Weight is considered during the periodic required inspection and servicing of（）.A
CO2 (carbon dioxide) fire extinguishersB
foam fire extinguishersC
water (stored pressure) fire extinguishersD
All of the above
考题
单选题（）as the chemical extinguisher agent, should be used for a an electric fire.A
Dry chemical or foamB
Foam or soda acidC
carbon dioxide or foamD
carbon dioxide or dry chemical
考题
单选题Which of the following statements represents the correct action to take when three crew members discover a fire?（）A
One man report the fire, and the other two men fight the fireB
One man report the fire, one man fight the fire, and one man evacuate and secure the areaC
One man report the fire, one man fight the fire, and one man act as a safety observerD
All three men fight the fire and report it immediately after it is extinguished
考题
单选题An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.A
greater rangeB
effective on all types of firesC
cleanlinessD
All of the above
考题
单选题The type of extinguisher which should be used for an electricity fire is（）.A
foam or soda acidB
dry chemical or foamC
carbon dioxide or dry chemicalD
carbon dioxide or foam
考题
单选题When fighting an oil or gasoline fire in the bilge，which of the following should NOT be used?（）A
FoamB
Solid stream water nozzleC
All-purpose nozzleD
Carbon dioxide
考题
单选题Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.A
It causes minimal damageB
It is safe for personnelC
It is cheaperD
It is most effective on a per unit basis
考题
单选题What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）A
Effective even if ventilation is not shut downB
Will not deteriorate in storageC
Non-corrosiveD
Effective on electrical equipment
考题
单选题When water is used to fight a fire on board a ship，the effect of the weight of the water must be taken into account. How much sea water will increase the weight displacement by one ton?（）A
64 cubic feetB
35 cubic feetC
100 gallonsD
500 liters
考题
单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）A
Carbon dioxide is corrosive when exposed to fireB
Carbon dioxide should be applied slowly to a large engine room fireC
Its total cooling effect is far greater than waterD
Its smothering effect is excellent for class B fires
考题
单选题Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.A
completely closing the compartmentB
closing the compartment except for the ventilatorsC
leaving the compartment open to the airD
increasing the air flow to the compartment by blowers
考题
单选题Which types of portable fire extinguishers are designed for use on electrical fires?（）A
Dry chemical and carbon dioxideB
Foam (stored pressure) and soda-acidC
Carbon dioxide and foam (stored pressure)D
Dry chemical and soda-acid
考题
单选题A carbon dioxide fire extinguisher should be recharged（）.A
at least annuallyB
whenever it is below its required weightC
only if the extinguisher has been usedD
before every safety inspection
考题
单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）A
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationB
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasC
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasD
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
考题
单选题When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.A
first to the bottom of the flaming area，sweeping from side to side，and following the flames upwardB
in a circular motion from the middle of the bulkhead outwardC
to the top of the flaming area，sweeping from side to side，and working toward the bottomD
in an up-and-down motion from one side of the bulkhead to the other
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