更多"A change in engine speed is require"的相关试题:
[单项选择]The required amount in the change of speed necessary before a governor will make a corrective movement is known as （）.
A. speed droop
B. sensitivity
C. stability
D. promptness
[单项选择]The minimum speed an engine must attain before ignition can occur depends upon （）.
A. the type and size of the engine
B. the condition of the engine
C. ambient temperature
D. all of the above
[单项选择]A governor automatically controls engine speed by regulating （）.
A. fuel supply
B. firing order
C. engine load
D. oil level
[单项选择]The hydraulic （） is used to control engine speed.
A. motor
B. pump
C. governor
D. capstan
[单项选择]The heat required to change a substance from a liquid to a gas without experiencing a temperature change is defined as the latent heat of （）.
A. fusion
B. vaporization
C. sublimation
D. condensation
[单项选择]The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of （）.
A. fusion
B. vaporization
C. condensation
D. sublimation
[单项选择]The bridge should inform the engine room before passing through congested or shallow waterway（）
A. 24 hours
B. 2 hours
C. 1 hours
D. 15 minutes
[单项选择]（）get your engine ready before six tomorrow morning.
A. You’d better
B. You would better
C. You at least
D. You at most
[单项选择]Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A. open the bypass line
B. cut in the lube oil cooler
C. pressurize the lube oil system
D. top off the expansion tank
[单项选择]Before starting an engine by air, the engine must（）
A. be turned by a turning gear for at least one minute
B. be turned by a turning gear for at least two minutes
C. be turned at least one complete turn
D. be turned at least two complete turns
[单项选择]On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）
A. accumulator spring compressor
B. balance piston
C. compensating needle valve
D. proportional piston
[单项选择]“The engine not obtaining the sufficient speed for firing” means that （）.
A. the start fails
B. the fuel pumps will be put into operation
C. the fuel valves are damaged
D. the combustion process will take over
[单项选择]A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A. engine overload
B. leaky valves
C. stuck or broken piston rings
D. low air injection pressure
[单项选择]A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）
A. low lube oil temperature
B. low starting air temperature
C. air bubbles in the fuel oil system
D. water in the starting air system
[单项选择]As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?（）
A. Compression ratio
B. Fuel/Air ratio
C. Compression pressure
D. Lube oil pressure
[单项选择]The rotating range of the low speed diesel engine is usually lower than （）.
A. 100 rpm
B. 200 rpm
C. 300 rpm
D. 500 rpm
[单项选择]The term medium speed diesel engine is currently taken to mean an engine with an operating rotational speed of （） rpm.
A. below 300
B. above 1200
C. between 300 to 1200
D. below 1200
[单项选择]The diesel engine must be started before it can run by it self For this purpose （） has to be used.
A. a starting system
B. the starting air
C. a starting operation
D. A, B and C
