更多"A diesel engine should not be opera"的相关试题:
[单项选择]Routine monitoring of a diesel engine should include （）.
A. checking for leaks
B. checking temperatures and pressures
C. listening for abnormal noises
D. all of the above
[单项选择]An automated diesel engine should normally shut down due to （）
A. low lube oil temperature
B. high ambient air temperature
C. low tube oil pressure
D. high exhaust system back pressure
[单项选择]The oil index of main engine should be controlled to prevent it from in heavy weather（）
A. over heat
B. over speed
C. over pressure
D. over worn
[单项选择]Why the cooling water of the diesel engine should be treated? Because the（）
A. Cooling water is alkalescence
B. cooling water is acidity
C. cooling water has salinity
D. cooling water has impurity
[单项选择]Once a fire is detected the engine should be slowed downOn no account （）.
A. the trunking should be opened up
B. should the trunking be opened up
C. the trunking should not be opened up
D. should the trunking not be opened up
[单项选择]Before being shut down, a diesel engine should idle a few minutes in orderto （）
A. prevent governor surging at shutdown
B. make sure the fuel nozzles are flushed clean
C. prevent pressure buildup in the fuel lines
D. prevent damage from localized overheating
[单项选择]The cooling water of the diesel engine should be treated, because it has（）
A. alkale scence
B. acidity
C. salinity
D. impurity
[单项选择]The exhaust gases for a new engine should be （） when the engine operates under full load.
A. smoky
B. a little bit dense
C. visible
D. almost invisible
[单项选择]Before starting a diesel engine, you should always（）
A. check the pyrometer readings
B. check the crankcase oil level
C. check the fuel oil strainers
D. clean the fuel system
[单项选择]When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）
A. air quantity aspirated
B. fuel injection pressure
C. combustion pressure on the power stroke
D. compression on the compression stroke
[单项选择]Load control on a diesel engine is accomplished by （）.
A. regulating the speed of the turbocharger
B. rotating the fuel injector pump plunger
C. regulating the speed of the fuel oil transfer pump
D. changing engine timing
[单项选择]Before starting the engine the air bottle should be （）.
A. pumped up
B. loaded
C. discharged
D. opened
[单项选择]Main propulsion engine lube oil sumps should be constructed （）
A. so as to never be integral lube
B. with a sloped bottom
C. only of nonferrous, noncorrosive metals
D. with drain/return lines terminating just above or at the designed normal level
[单项选择]When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.
A. has to be handled
B. may be handled
C. has being handled
D. will be handling
[单项选择]Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.
A. increase
B. decrease
C. fluctuate
D. remain constant
[单项选择]An increase in load on a diesel engine results in （） of speed of the crankshaft.
A. a reduction
B. an increase
C. an outing
D. a downwards
[单项选择]A reduction in load on a diesel engine results in （） of speed of the crankshaft.
A. a reduction
B. an increase
C. an outing
D. a downwards
[单项选择]The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）
A. prevent the diesel engine surging
B. prevent governor from being damaged because of swing
C. reduce the probability of the crank shaft being torsional vibrated and resonated
D. prevent the main engine being overload or overspeed
[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
