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单选题
When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.
A
attempt to isolate the fire from the LPG
B
cool the bottles or remove them from the fire area
C
see that the valves on all LPG bottles are closed
D
place insulating material over the bottles
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更多 “单选题When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.A attempt to isolate the fire from the LPGB cool the bottles or remove them from the fire areaC see that the valves on all LPG bottles are closedD place insulating material over the bottles” 相关考题
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When he crashed the car,______six bottles of beer.A. drankB. was drinkingC. drinksD. had drunk
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Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pumproom, provided that the ______.A.persons in the space wear gas masksB.persons in the space wear damp cloths over their mouths and nostrilsC.ventilation system is secured and all persons leave the spaceD.ventilation system is kept operating
考题
Polyester (聚酯) is now being used for bottles. ICI, the chemicals and plastics company,believes that it is now beginning to break the grip of glass on the bottle business and thus take advantage of this huge market.
All the plastics manufacturers have been experiencing hard times as their traditional products have been doing badly world-wide for the last few years. Between 1982 and 1984 the Plastics Division of ICI had lost a hundred and twenty million dollars, and they felt that the most hopeful new market was in packaging, bottles and cans.
Since 1982 it has opened three new factories producing "Melinar", the raw material frown which high quality polyester bottles are made.
The polyester bottle was born in the 1970s, when soft drinks companies like Coca Cola started selling their drinks in giant two-liter containers. Because of the build-up of the pressure of gas in these large containers, glass was unsuitable. Nor was PVC, the plastic which had been used for bottles since the 1960s, suitable for drinks with gas in them. A new plastic had to be made.
Glass is still cheaper for the smaller bottles and will continue to be so, unless oil and plastic become much cheaper, but plastic does well for the larger sizes.
Polyester bottles are virtually unbreakable. The manufacturers claim they are also lighter, less noisy when being handled, and can be reused. Shopkeepers and other business people are unlikely to object to a change from glass to polyester, since these bottles mean few breakages, which are costly and time-consuming. The public, though, have been more difficult to persuade. ICI's commercial department is developing different bottles with interesting shapes, to try and make
them visually more attractive to the public.
The next step could be to develop a plastic which could replace tins for food. The problem here is the high temperatures necessary for cooking the food in the container.
Why aren't all bottles now made of polyester?A.The price of oil and plastic has risen.
B.It is not suitable for containing gassy drinks.
C.The public like traditional glass bottles.
D.Shop-keepers dislike reusable bottles.
考题
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Polyester (聚酯 ) is now being used for bottles. ICI, the chemicals and plastics company, believes that it is now beginning to break the grip of glass on the bottle business and thus take advantage of this huge market.
All the plastics manufacturers have been experiencing hard times as their traditional products have been doing badly world-wide for the last few years. Between 1982 and 1984 the Plastics Division of ICI had lost a hundred and twenty million dollars, and they felt that the most hopeful new market was in packaging, bottles and cans.
Since 1982 it has opened three new factories producing "Melinar", the raw material from which high quality polyester bottles are made.
The polyester bottle was born in the 1970s, when soft drinks companies like Coca Cola started selling their drinks in giant two-liter containers. Because of the build-up of the pressure of gas in these large containers, glass was unsuitable. Nor was PVC, the plastic which had been used for bottles since the 1960s, suitable for drinks with gas in them. A new plastic had to be made.
Glass is still cheaper for the smaller bottles and will continue to be so, unless oil and plastic become much cheaper, but plastic does well for the larger sizes.
Polyester bottles are virtually unbreakable. The manufacturers claim they are also lighter, less noisy when being handled, and can be reused. Shopkeepers and other business people are unlikely to object to a change from glass to polyester, since these bottles mean few breakages, which are costly and time-consuming. The public, though, have been more difficult to persuade. ICI's commercial department is developing different bottles with interesting shapes, to try and make them visually more attractive to the public.
The next step could be to develop a plastic which could replace tins for food. The problem here is the high temperatures necessary for cooking the food in the container.
Why aren't all bottles now made of polyester?
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A．The price of oil and plastic has risen.
B．It is not suitable for containing gassy drinks.
C．The public like traditional glass bottles.
D．Shopkeepers dislike reusable bottles.
考题
When a repeating timer expires,（）.A、The When-Timer-Expired trigger resets the timer's iteration parameter. B、The When-Custom-Item-Event trigger fires and executes the desired actions. C、It is put in a queue of expired timers for processing on a first-in-first-out basis. D、The When-Timer-Expired trigger fires instantly regardless of any other processing in the form module.
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strengthB
denseC
percentageD
velocity
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单选题Halon fire extinguishers are NOT effective when used on which types of fires?（）A
Fires in electrical equipmentB
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单选题One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.A
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it will decompose under prolonged storage and lose its effectivenessC
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问答题In a supermarket, the aisles are numbered one to six from the entrance. Washing powder is next to bottles and it is not the first item you see when entering the supermarket. You will see the meat aisle before the bread aisle. Tins are two aisles before bottles and meat is four aisles after fruit. What is in the last aisle (aisle six)?
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
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单选题Aqueous Film Forming Foam (AFFF), commonly known as ‘light water’, is especially suitable for fighting （）A
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class B fires in paint lockersC
any class D fireD
all of the above
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suffocate the fireB
absorb the oxygen supporting the fireC
act as a cooling agentD
wash the fire away
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单选题Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.A
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marine strainerD
pick axe
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increase；reduceB
reduce；increaseC
increase；increaseD
reduce；reduce
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单选题A fire is considered "under control" when （）.A
all hands are at their fire stationsB
all fire-fighting equipment is at the sceneC
the fixed systems are activatedD
the fire is contained and no longer spreading
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单选题Which space(s) on your cargo vessel must have a fire detection system?（）A
Any compartment containing explosivesB
Any compartment adjacent to one containing explosivesC
Enclosed spaces which are specially suitable for vehiclesD
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FoamB
Solid stream water nozzleC
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考题
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darknessB
daylightC
simulated engine-roomD
all of the above
考题
单选题Why aren’t all bottles now made of polyester? _____A
The price of oil and plastic has risen.B
It is not suitable for containing gassy drinks.C
The public like traditional glass bottles.D
Shop keepers dislike reusable bottles.
考题
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Ⅰ onlyB
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考题
单选题When fighting an electrical fire, you should first （）.A
stop ventilation to the areaB
stop the vesselC
secure electricity to the circuitD
apply CO2 to the fire
考题
单选题When a repeating timer expires,（）.A
The When-Timer-Expired trigger resets the timer's iteration parameter. B
The When-Custom-Item-Event trigger fires and executes the desired actions. C
It is put in a queue of expired timers for processing on a first-in-first-out basis. D
The When-Timer-Expired trigger fires instantly regardless of any other processing in the form module.
考题
单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed space, such as in the pumproom, provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
考题
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the steering gear roomB
the fire fighting pipe lineC
the fuel oil tankD
the bath room
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单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
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