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单选题
（） is used to produce electric power.
A
An alternator
B
fresh water generator
C
A compressor
D
A clarifier
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What type of extinguisher should be used for an electric fire? ________A.CO2B.FormC.WaterD.Water and Form
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______ is not usually used in liquid cargo systems．A.Hydraulic drive systemsB.Electric drive systemsC.Steam drive systemsD.Man-powered drive systems
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The “Port-Off-Stbd” selector switch on an autopilot steering stand is used to ______．A.change from hand electric steering to automatic gyroB.change over one steering system to the otherC.change over hand electric steering to non-follow-upD.change over the port to the starboard bow thruster
考题
根据以下材料，回答
There is little debate about the firstdevelopment of the energy system of the 22nd century--that most of the energyproduced on a large scale will be in the form of electric power. Thus, most presentconcepts for major long-term energy sources (solar, geothermal, fusion) are basedupon electric power production at central plants.
The second major development is thepotential use of hydrogen as both a basic fuel to replace natural gas and aspart of a general system to convert, store and transmit electric energy overlong district by fuel cells, or it could be used directly as a fuel forcommercial, industrial or transportation purposes.
Although hydrogen seems likely to play amajor role in the future as a form of energy transport and storage, other processesmay also be useful. Here we note only two possibilities.
Flywheels: It appears to be workable toconstruct flywheels of almost any needed size that would be efficientconverters (93-95 percent) in first storing and then releasing electric power.In addition, the kinetic (动力的) energy ofrotation is easily converted to alternating electric power. But the engineeringis at an early stage of development, and a decade or more may pass before this potentialcan be reliably estimated.
Batteries and fuel cells: some of the manybatteries being developed today look quite promising. Within a decade or two, abattery-operated electric auto might even become competitive with today′ s vehicles,at least for driving ranges up to 200 miles. An electric automobile would bepollution-free,and would probably be more energy-efficient than theinternal-combustion (内燃) engine.
A fuel cell (which may be considered a hydridebattery) with about 40 percent conversion efficiency is expected to enter powerproduction on a large scale within about five years. Unlike steam-poweredgenerators, fuel cells can be made large or small and their efficiency inoperation is essentially independent of the loading. Thus they may avoid mostof the distribution costs of electric power as well as provide pollution-fleepower and offer opportunities for using the "waste heat" effectively.
From the passage we can see that thefuel cell might be something ___________.A.with the electric energy stored in itwithout pollution
B.in which chemicals are contained
C.in which certain fuels such as hydrogenare filled
D.like a small steam generator
考题
根据以下材料，回答
There is little debate about the firstdevelopment of the energy system of the 22nd century--that most of the energyproduced on a large scale will be in the form of electric power. Thus, most presentconcepts for major long-term energy sources (solar, geothermal, fusion) are basedupon electric power production at central plants.
The second major development is thepotential use of hydrogen as both a basic fuel to replace natural gas and aspart of a general system to convert, store and transmit electric energy overlong district by fuel cells, or it could be used directly as a fuel forcommercial, industrial or transportation purposes.
Although hydrogen seems likely to play amajor role in the future as a form of energy transport and storage, other processesmay also be useful. Here we note only two possibilities.
Flywheels: It appears to be workable toconstruct flywheels of almost any needed size that would be efficientconverters (93-95 percent) in first storing and then releasing electric power.In addition, the kinetic (动力的) energy ofrotation is easily converted to alternating electric power. But the engineeringis at an early stage of development, and a decade or more may pass before this potentialcan be reliably estimated.
Batteries and fuel cells: some of the manybatteries being developed today look quite promising. Within a decade or two, abattery-operated electric auto might even become competitive with today′ s vehicles,at least for driving ranges up to 200 miles. An electric automobile would bepollution-free,and would probably be more energy-efficient than theinternal-combustion (内燃) engine.
A fuel cell (which may be considered a hydridebattery) with about 40 percent conversion efficiency is expected to enter powerproduction on a large scale within about five years. Unlike steam-poweredgenerators, fuel cells can be made large or small and their efficiency inoperation is essentially independent of the loading. Thus they may avoid mostof the distribution costs of electric power as well as provide pollution-fleepower and offer opportunities for using the "waste heat" effectively.
In which of the following is the use ofthe "waste heat" mentioned?A.The fuel cell.
B.The fly wheel.
C.The steam-powered generator.
D.The internal-combustion engine.
考题
根据以下材料，回答
There is little debate about the firstdevelopment of the energy system of the 22nd century--that most of the energyproduced on a large scale will be in the form of electric power. Thus, most presentconcepts for major long-term energy sources (solar, geothermal, fusion) are basedupon electric power production at central plants.
The second major development is thepotential use of hydrogen as both a basic fuel to replace natural gas and aspart of a general system to convert, store and transmit electric energy overlong district by fuel cells, or it could be used directly as a fuel forcommercial, industrial or transportation purposes.
Although hydrogen seems likely to play amajor role in the future as a form of energy transport and storage, other processesmay also be useful. Here we note only two possibilities.
Flywheels: It appears to be workable toconstruct flywheels of almost any needed size that would be efficientconverters (93-95 percent) in first storing and then releasing electric power.In addition, the kinetic (动力的) energy ofrotation is easily converted to alternating electric power. But the engineeringis at an early stage of development, and a decade or more may pass before this potentialcan be reliably estimated.
Batteries and fuel cells: some of the manybatteries being developed today look quite promising. Within a decade or two, abattery-operated electric auto might even become competitive with today′ s vehicles,at least for driving ranges up to 200 miles. An electric automobile would bepollution-free,and would probably be more energy-efficient than theinternal-combustion (内燃) engine.
A fuel cell (which may be considered a hydridebattery) with about 40 percent conversion efficiency is expected to enter powerproduction on a large scale within about five years. Unlike steam-poweredgenerators, fuel cells can be made large or small and their efficiency inoperation is essentially independent of the loading. Thus they may avoid mostof the distribution costs of electric power as well as provide pollution-fleepower and offer opportunities for using the "waste heat" effectively.
The energy we use most todayis___________A.solar energy
B.geothermal energy
C.hydrogen
D.electricity
考题
这些舱盖通常是用电力或液压驱动的。（）A、These hatches are usually driven by electric or hydraulic power.B、These hatch covers are usually driven by electric or hydraulic power.C、These hatch covers are usually driven by electric.D、These hatch covers are usually driven by hydraulic power.
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These hatch covers are usually driven by electric or hydraulic power.（）A、这些舱盖通常是用电力驱动的B、这些舱盖通常是用液压驱动的C、这些舱盖通常是用电力或液压驱动的D、这些舱盖通常是用油压或液压驱动的
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Which of the following is used to produce the best LCD image on a laptop？（）A、Dual scanB、Active matrixC、Passive matrixD、Active scanning
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单选题The material used to produce a sand painting is ______.A
colorful paintB
beach sandC
sandstoneD
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单选题这些舱盖通常是用电力或液压驱动的。（）A
These hatches are usually driven by electric or hydraulic power.B
These hatch covers are usually driven by electric or hydraulic power.C
These hatch covers are usually driven by electric.D
These hatch covers are usually driven by hydraulic power.
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单选题Tools with （）handles should be used to check electric circuit.A
plasticB
metalC
stainless steelD
copper
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liquidB
gasC
solidD
water only
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wdadmB
mrgpwdC
makedbmD
mkpasswd
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单选题We can conclude from the passage about nuclear fusion EXCEPT ______.A
it has great potential to produce abundant clean energyB
NIF has just finished constructing a practical fusion reactorC
extreme temperatures are needed to work itD
it has not been successfully used to produce net energy gain in labs
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单选题Americans fully realized what Edison’s inventions meant when they _____.A
heard of his deathB
heard of the plan to honor himC
first used electric powerD
tried to carry out the plan
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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（） is used to produce electric power.A
An alternatorB
fresh water generatorC
A compressorD
A clarifier
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单选题（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.A
anaerobic bacteriaB
aerobic bacteriaC
air bubblesD
disinfection chemicals
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单选题The self-contained breathing device should not be used in which situation?（）A
Oxygen deficient spacesB
Compartments containing poisonous vaporsC
Fighting fires that produce heavy smokeD
Underwater search
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单选题When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）A
CO2B
Methyl chlorideC
R-22D
Sulphur dioxide
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单选题The electric shaver _____ before it can be used.A
needs repairingB
requires to repairC
should be in repairD
has to be repairable
考题
单选题The most common forms of main drive used on deck auxiliaries are （）.A
steam plants, electric motors and compressed airB
diesel engine, hydraulic machinery and compressed airC
steam plants, electric motors and hydraulic machineryD
diesel engines, steam plants and hydraulic machinery
考题
单选题What type of electric motor is most commonly used on board ship?（）A
non-synchronous electric motorB
synchronous electric motorC
fully enclosed electric motorD
watertight electric motor
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单选题In a “throwaway society”, ______.A
people shouldn’t produce any plastic thingsB
people can get anything they want from othersC
people always throw away the used things and buy new ones
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