更多"A diesel engine experiences a sudde"的相关试题:
[单项选择]A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）
A. turbocharger malfunction or failure
B. crankcase exhauster overload
C. overload on the intercooler
D. obstruction in the engine cylinders
[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]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]The hydraulic （） is used to control engine speed.
A. motor
B. pump
C. governor
D. capstan
[单项选择]A sudden drop in diesel engine cylinder compression pressure can be caused by（）
A. a leaking fuel injector nozzle
B. a clogged air filter
C. excessively early fuel injection
D. malfunctioning valves
[单项选择]A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）
A. loss of additives from the lube oil
B. carbon deposits in the lube oil
C. excessive centrifuging
D. excessive fuel dilution
[单项选择]Sudden unloading of a diesel engine can cause（）.
A. decreased fuel efficiency
B. increased exhaust temperature
C. black smoke
D. overspeed trip
[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]The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
A. Low compression pressure and high exhaust temperature
B. Low firing pressure and high exhaust temperature
C. Low compression pressure and low exhaust temperature
D. Low firing pressure and low exhaust temperature
[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]A sudden noise of a fire-engine made him（）to the door.
A. hurrying
B. hurried
C. hurry
D. to hurry
[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 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
[单项选择]If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）
A. decrease until the engine speed increases
B. increase as the load increases
C. decrease as the load
D. increases remain unchanged
