更多"If a diesel engine turned over at n"的相关试题:
[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]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 gasoline engine turns over freely but will not start，the cause is generally（）.
A. a defective ignition system
B. low lube oil level
C. weak valve springs
D. too heavy a load
[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]In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
A. a flash generator
B. a flash evaporator
C. a vacuum boiling evaporator
D. a boiler
[单项选择]If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）
A. Move the fuel control mechanism to the no fuel position
B. Block the fuel supply by closing the master fuel valve
C. Shut off the fuel supply and block the flow of intake air
D. Relieve all pressure in the fuel system
[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]If a diesel engine driving a generator turns over freely but fails to fire properly, the cause could be （）
A. excessive compression pressure
B. air in the fuel lines
C. high fuel pressure
D. excessive load
[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]An over-speed trip stops a diesel engine when the engine （）
A. runs out of fuel
B. has low lubricating oil pressure
C. exceeds a set maximum speed
D. has high cooling water temperature
[单项选择]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[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]If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
A. at each control station
B. in the chief engineer’s quarters
C. in the captains quarters
D. All of the above are correct
[单项选择]A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
A. as much fuel as
B. less fuel than
C. less fuel as
D. more fuel than
[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]A diesel engine is similar to a gasoline engine except that the former has no （）.
A. cross-head
B. cylinder
C. connecting rod
D. spark plug
