网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
How does foam extinguish an oil fire ?______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
参考答案
更多 “ How does foam extinguish an oil fire ?______.A.By cooling the oil below the ignition temperatureB.By removing the fuel souce from the fireC.By excluding the oxygen from the fireD.By increasing the weight of the oil ” 相关考题
考题
Oil fires are best extinguished by ______.A.cutting off the supply of oxygenB.removing the fuelC.cooling below the ignition temperatureD.spraying with water
考题
One of the limitations of foam as an extinguishing agent is that foam ______.A.cannot be made with salt waterB.is heavier than oil and sinks below its surfaceC.is corrosive and a hazard to fire fightersD.conducts electricity
考题
In the event of a small bunker oil spill on deck occurring while bunkering, you should ____.A.wash down the area immediately with a fire hoseB.wash down the area with keroseneC.cover the area with absorbent materialD.cover the area with foam
考题
A fire of escaping liquefied flammable gas is best extinguished by ______.A.cooling the gas below the ignition pointB.cutting off the supply of oxygenC.stopping the flow of gasD.interrupting the chain reaction
考题
A foam-type portable fire extinguisher is most useful in fighting a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
考题
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.A.generatorsB.oil drumsC.the bridge controlsD.combustible metals
考题
As an extinguishing agent, foam ______.A.conducts electricityB.should be directed at the base of the fireC.is most efffective on buring gases which are flowingD.extinguishes by cooling oil fires below ignition temperature
考题
Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition
考题
Never extinguish oil and electrical fires with （）.A、waterB、foam extinguisherC、CO2 extinguisherD、portable extinguisher
考题
单选题How does foam extinguish an oil fire?（）A
By cooling the oil below the ignition temperatureB
By removing the fuel source from the fireC
By excluding the oxygen from the fireD
By increasing the weight of the oil
考题
单选题0il fires are best extinguish by（）.A
cutting off supply of oxygenB
removing the fuelC
cooling below the ignition temperatureD
spraying with water
考题
单选题If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）A
a dirty lube oil strainerB
internal water leaksC
an oil suction line restrictionD
excessive wears of the cooling water pump
考题
单选题What is an advantage of using foam in fire fighting?（）A
It is effective in controlling fire in flowing oil such as coming from a broken fuel lineB
It absorbs heat from materials that could cause reignitionC
Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentD
Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
考题
单选题The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.A
secure all openings to the tankB
discharge an initial charge of CO2 with a hand portable extinguisherC
direct a fire hose into the tank and energize the fire mainD
spray the tank boundaries with a fire hose to promote cooling
考题
单选题As an extinguishing agent，foam（）.A
conducts electricityB
should be directed at the base of the fireC
is most effective on burning gases which are flowingD
extinguishes by cooling oil fires below ignition temperature
考题
单选题As an extinguishing agent,foam（）.A
couducts electricityB
should be directed at the base of the fireC
is most effective on burning gases which are flowingD
extinguishes by cooling oil fires blow ignition temperature
考题
单选题The best method of extinguishing a class A fire is to（）.A
remove oxygen from the areaB
cool fuel below ignition temperatureC
smother with CO2D
smother fire with foam
考题
单选题Oil fires are best extinguished by（）.A
cutting off the supply of oxygenB
removing the fuelC
cooling below the ignition temperatureD
spraying with water
考题
单选题Which of the following statements is true concerning an oil cooler?（）A
The oil temperature is less than the cooling water temperatureB
The oil pressure is less than the cooling water pressureC
The oil pressure is greater than the cooling water pressureD
The oil flow control valve is always installed in the oil input line
考题
单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）A
decrease in ignition lagB
increase in fuel economyC
reduction in lube oil viscosityD
increase in cylinder misfiring
考题
单选题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 vaporsB
permitting re-ignition boiling of the heated oilC
spontaneous combustion below the oil surfaceD
toxic fumes from escaping to the surface
考题
单选题Lube oil in the fresh water cooling system of a diesel engine may result from a （）A
camshaft seizureB
lube oil pump failureC
lube oil cooler failureD
lube oil pump overflow
考题
单选题Foam extinguishes a fire by（）.A
shutting off the air supplyB
cooling the fuel to below ignition temperatureC
dispersing the fuelD
removing the source of ignition
考题
单选题Shaker, circulation and spray are the three general methods used in（）A
pre-injection fuel oil treatmentB
lube oil filtrationC
lube oil purificationD
piston cooling
考题
单选题0ne of the limitations of foam as an extinguishing agent is that foam（）.A
cannot be made with salt waterB
is heavierthan oil and sinks below its surfaceC
is corrosive and to fire fightersD
conducts electricity
考题
单选题In the event of a small bunker oil spill on deck occurring while bunkering, you should （）.A
wash down the area immediately with a fire hoseB
wash down the area with keroseneC
cover the area with absorbent materialD
cover the area with foam
考题
单选题When used to fight fire，carbon dioxide（）.A
is effective if used promptly on an oil fireB
has a greater cooling effect than waterC
is lighter than airD
is harmless to cargo and crew
热门标签
最新试卷
