更多"A diesel engine is turned at normal"的相关试题:
[单项选择]A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）
A. low lube oil temperature
B. low starting air temperature
C. air in the fuel injection
D. water in the starting air system
[单项选择]If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）
A. excessive fuel pressure
B. high lube oil viscosity
C. inadequate fuel injection
D. excessive starting air pressure
[单项选择]If a diesel engine turned over freely but failed to start, the cause could be （）
A. water in the fuel
B. cold lube oil
C. excessive starting air pressure
D. excessive fuel pressure
[单项选择]Immediately after starting a diesel engine, normal raw water and jacket water pressure are indicatedHowever, the jacket water temperature continues to rise, if there is no change in the sea temperature, you should suspect（）
A. overloading in all cylinders
B. a jammed three-way thermostatic valve
C. chromate PH too low
D. a high level in the surge tank
[单项选择]If a cam-controlled engine has a normal injection pressure at rated speed,the injection pressure will be（）at slow speed.
A. a little lower
B. a little higher
C. too low
D. exactly the same
[单项选择]If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）
A. too low
B. a little lower
C. a little higher
D. exactly the same
[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 change in engine speed is required before a governor is able to make a corrective movement of fuel rackThis aspect of governing is commonly expressed as a percent and is known as （）
A. governor sensitivity
B. governor promptness
C. speed droop
D. isochronous governing
[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]A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a （）.
A. slow-speed diesel
B. medium-speed diesel
C. high-speed diesel
D. constant-speed diesel
[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]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]He said that he had turned the main engine one complete revolution with the （）.
A. turning gear
B. steering gear
C. spur gear
D. chain gear
[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 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]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]On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）
A. dial indicator
B. outside caliper
C. bridge gauge
D. tram rod
