A . the pressure of the starting air is high enough
B . there is enough air in the air reservoirs
C . the air is supplied into the cylinders in the appropriate sequence
D . all of the above
[单选题]If the engine does not start on air, it may be due toA．low compression of the fuel pumpsB．incorrect timing of fuel pumpsC．the starting air valves stuckD．air-locks in fuel oil pipeline
[单选题]If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.A . compression pressures are below normalB . lube oil is diluted with fuel oilC . cranking speed is too lowD . exhau
[单选题]If the engine does not start on air, it may be due to （）A . low compression of the fuel pumpsB . incorrect timing of fuel pumpsC . the starting air valves stuckD . air-locks in fuel oil pipeline
[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may be _____.A．failure of the fuel pumpsB．starting air pressure too lowC．stop valve in air line closedD．the turning gear still engaged
[单选题]A diesel engine may be hard to start if the （）A . air intake is restrictedB . engine is cranked too fastC . vibration dampener is faultyD . exhaust back pressure is low
[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.A . low compressionB . failure of the fuel pump to discharge fuelC . incorrect timing of fuel pumpD . turning gear being still o
[单选题]Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.A . to stiffenB . to softenC . to loosenD . to wear
[单选题]___________[A] Since [B] If [C] Unless [D] While
[单选题]A．) thoughB．) ifC．) asD．) unless
[单选题]_________[A] if [B] unless [C] as [D] lest