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）
单选题
A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.
A
alternate expansion and contraction as water in a liquid state becomes a vapor
B
absorption of smoke and gases as water is converted from a liquid to a vapor
C
rapid contraction as water is converted from a liquid to a vapor
D
rapid expansion as water absorbs heat and changes to steam
参考答案
参考解析
解析：
暂无解析
更多 “单选题A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.A alternate expansion and contraction as water in a liquid state becomes a vaporB absorption of smoke and gases as water is converted from a liquid to a vaporC rapid contraction as water is converted from a liquid to a vaporD rapid expansion as water absorbs heat and changes to steam” 相关考题
考题
One advantage of the all-purpose nozzle is that it ______.A.can fit any size hoseB.converts a stream of water into a fogC.increases the amount of water reaching the fireD.can spray two streams of water at the same time
考题
A()isaboilerwherethewater／steamsidegetsheatinputbothfromthemainenginesexhaustgasandfromanoilfiredburnersupplementingtheheatinputtoproducetherequiredsteam。
A、fire-tubeboilerB、auxiliaryboilerC、water-tubeboilerD、compositeboiler
考题
In a ______boiler the hot gases from the furnace pass through the tubes while the water is on the outside.A.water-tubeB.fire-tubeC.exhaust gasD.Composite
考题
A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the ______．A.Fire hose might be damaged by cargo operationsB.Vessel is in portC.Fire-main system is not chargedD.Fire pumps are used for purposes other than supplying water to the fire main
考题
A galley grease fire on the stove may be extinguished using______．A.waterB.foamC.the range hood extinguishing systemD.fire dampers
考题
An important step in fighting any electrical fire is to ______.A.stop ventilationB.stop the vesselC.de-energize the circuitD.apply water to extinguish the fire
考题
Generally, the first action in extinguishing an LFG fire caused by escaping gas is to ______.A.sweep flames away with water sprayB.shut off the leakC.use a chemical foam fire extinguisherD.call the local fire department
考题
单选题On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.A
acrylic acidB
benzeneC
oleumD
vinyl toluene
考题
单选题One advantage of the all-purpose nozzle is that it（）.A
can fit any size hoseB
converts a stream of water into a fogC
increases the amount of water reaching the fireD
can spray two streams of water at the same time
考题
单选题The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.A
shield fire fighters from radiant heatB
break up burning materialC
get the most water possible on the fireD
drive heat and smoke ahead of the fire fighters
考题
单选题Which of the following statements concerning the water tube and fire tube boilers is not true?（）A
natural circulation of the water in the water tube boiler is better than that in the fire tube boilerB
for the same output the water tube boiler will carry less mass of water compared with the fire tube boilerC
the water tube boiler will cost shorter time for steam raisingD
the water tube boiler require lower skill in operating and maintaining
考题
单选题Which firefighting method is an example of an indirect attack on a fire?（）.A
Bouncing a straight stream of water off the overhead to create spray effectB
Spraying foam on a bulkhead and letting it flow down and over a pool of burning oilC
Flooding a paint locker with CO2 and sealing the compartmentD
Cooling adjacent bulkheads with water to prevent the spread of the fire by conduction
考题
单选题What is an advantage of using foam in fire fighting?（）A
It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)B
Most foams can be used with dry chemicals to attack a fire by two methodsC
Foam is effective on combustible metal firesD
Foam can be made with seawater or fresh water
考题
单选题An important step in fighting any electrical fire is to（）.A
stop ventilationB
stop the vesselC
de-energize the circuitD
apply water to extinguish the fire
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A distorted furnace in a fire-tube auxiliary boiler may be the result of （）A
firing for extended periods in the low fire modeB
overheating, due to waterside depositsC
varying the water level above the crown sheetD
carrying excessive alkalinity in the boiler water
考题
单选题When should a fire be ventilated?（）A
When attacking the fire directlyB
When using a steam smothering systemC
When using the fixed CO2 systemD
All of the above
考题
单选题Generally, the first action in extinguishing an LFG fire caused by escaping gas is to（）.A
sweep flames away with water sprayB
shut off the leakC
use a chemical foam fire extinguisherD
call t e local fire department
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（）belongs to emergency power supplying equipments.A
Emergency fire pumpB
WindlassC
Main sea water pumpD
Fresh water pump
考题
单选题A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.A
alternate expansion and contraction as water in a liquid state becomes a vaporB
absorption of smoke and gases as water is converted from a liquid to a vaporC
rapid contraction as water is converted from a liquid to a vaporD
rapid expansion as water absorbs heat and changes to steam
考题
单选题When sailing in cold zones, the（） should be drained of water.A
the ventilation pipeB
the water line for fire fighting on the deckC
the fuel oil lineD
the water supplying line in bath room
考题
单选题What are the most important reasons for using water fog to fight fires?（）A
Smothers burning surfaces，organically destroys fuelB
Cools fire and adjacent surfaces，provides protective barrierC
Reaches areas not protected by steam or CO2 smothering systemsD
Allows fire to be attacked from leeward，saturates liquid surfaces
考题
单选题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.A
opened and burned material removedB
left closed with vents off until all boundaries are coolC
checked for oxygen contentD
doused with water to prevent reflash
考题
单选题Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.A
sweep flames away with water sprayB
shut off the leakC
use a chemical foam fire extinguisherD
call the local fire department
热门标签
最新试卷