更多"The three conditions which cause en"的相关试题:
[单项选择]The total magnetic effects which cause deviation of a vessel’s compass can be broken down into a series of components which are referred to as（）.
A. divisional parts
B. coefficients
C. fractional parts
D. equations
[单项选择]Which cause of following will not lead to refrigeration plant short-cycle?（）
A. lack of refrigerant
B. refrigerant with much water
C. set defectively low pressure relay
D. no cooling water
[单项选择]Which of the following may cause that an engine doesnt turn on starting air?（）
A. too low starting air pressure
B. main starting valve closed
C. neither A nor B
D. A and B
[单项选择]After finished the engine, which of valves cannot be shut off by the duty engineer?（）
A. fuel valve
B. the starting air valve
C. the sea chest
D. the main sea pump inlet valve
[单项选择]Which cause of the following can lead to the engine not to start on air?（）
A. starting air pressure too high
B. correct timing of starting air valves
C. three of the starting valves stuck
D. the turning gear disengaged
[单项选择]In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）
A. noise coming from that air starting valve
B. continuous operation of the starting air compressor
C. zero air pressure in the air starting system
D. overheated starting air pipe to the cylinder head
[单项选择]In an internal combustion engine, which of the devices listed will force the compression rings to seal the compression gases in the space above the piston?（）
A. Used of bimetallic piston rings
B. Ring gap pre-tensioning
C. Thermal increase in ring-end clearance
D. Gas pressure acting against the back of the ring
[单项选择]In a four stroke engine, which process lasts the longest period?（）
A. exhaust and suction process
B. suction and compression process
C. combustion and exhaust process
D. working and exhaust process
[单项选择]The ignition of the fuel in diesel engine is caused by the （） of compression of the air previously admitted into the cylinders.
A. vacuum pressure
B. specific gravity
C. heat
D. viscosity
[单项选择]Air in the fuel lines of a diesel engine can cause （）
A. ignition failure
B. oxygen corrosion of the fuel lines
C. the pistons to seize
D. blue smoke
[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]A leaking diesel engine fuel injector will cause（）
A. prolonged maintenance intervals
B. improved atomization
C. greater fuel economy
D. incomplete combustion
[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]Which will cause the high pressure cutout to stop the compressor in a R-22 system?（）
A. Condenser leakage
B. A shortage of liquid refrigerant
C. Excessive frost on the evaporator
D. Not enough condenser cooling water
[单项选择]Clogged diesel engine fuel oil filters can cause（）
A. loss of power
B. misfiring
C. low fuel oil pressure
D. All of the above
[单项选择]Which will cause a wire rope to fail（）.
A. Using a medium graphite grease as a lubricant
B. Operating a winch too slow
C. Using a sheave with an undersized throat
D. A sheave diameter of 24 times the wire's diameter
[单项选择]An engine compartment gasoline fire requires which type of extinguisher?（）.
A. Carbon dioxide
B. Dry chemical
C. Foam
D. All of the above
