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单选题
The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.
A
camshaft；fresh air
B
camshaft；starting air
C
electronic motor which is controlled by a computer；fresh air
D
electronic motor which is controlled by a computer；starting air
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_______is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.A.An air receiverB.An operating valveC.An automatic valveD.An air distributor
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If you are unable to stop a diesel engine by any other means，you should ______．A.Discharge a CO2 extinguisher in the air inletB.Pull off the distributor capC.Secure the jacket waterD.Secure the starting air supply valve
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Conventionally a __________ is put in slashes （/ /）.A.allophone
B.phone
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D.morpheme
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I often do absent-minded things,particularly when I'm worried.A: inevitably
B: especially
C: obviously
D: conventionally
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B:obviously
C:especially
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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The lowest ring of a piston is （）.A
a coil springB
a sealing ringC
an oil distributor ringD
main seal ring
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单选题If an electric motor driven air compressor fails to start, it may be due to a （）.A
leaking discharge valveB
jammed suction valveC
tripped overload relayD
broken discharge un-loader
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单选题Vessel constrained by her draught is（）.A
a non-power driven vesselB
a sailing vesselC
a power driven vesselD
a power driven vessel or a non-power driven vessel
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单选题On opposite ends of a single shaft of a turboblower are a gas driven （）and a air compressor, which are sealed each other.A
charge air receiverB
scavenging air beltC
turbineD
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单选题这些舱盖通常是用电力或液压驱动的。（）A
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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Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.A
scavengingB
startingC
coolingD
blowing
考题
单选题If you are unable to stop a diesel engine by any other means，you should（）.A
discharge a CO2 extinguisher in the air inletB
pull off the distributor capC
secure the jacket waterD
secure the starting air supply valve
考题
单选题In the starting system, the automatic valve is controlled by（）, and the cylinder start valves are controlled by（）A
pilot air；pilot airB
handle；solenoidC
handle；pilot air coming through the distributorD
solenoid；pilot air coming through the distributor
考题
单选题（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.A
An air receiverB
An operating valveC
An automatic valveD
An air distributor
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单选题Which one of the followings might not be employed to create vacuum for flash type evaporator? （）A
high-pressure steam-driven air-ejectorB
motor-driven vacuum pumpC
water-motivated air eductorD
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单选题Modern engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.A
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单选题About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）A
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an independent；as wellD
an independent；has an engine-driven pump
考题
单选题“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）A
a modern diesel engine；a turbine wheelB
a modem diesel engine；exhaust gasesC
a compressor；an exhaust gas turbochargerD
a compressor；a turbine wheel
考题
单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）A
one-half engine speedB
the same as engine speedC
twice engine speedD
four times engine speed
考题
单选题Modem engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.A
make use ofB
have made the use ofC
by means ofD
make advantage of
考题
单选题The exhaust ports are located around the lower part of the cylinder liner, （）the products of combustion are driven by scavenging air.A
in whichB
by whichC
through whichD
from which
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