更多"If a diesel engine runs roughly, wh"的相关试题:
[单项选择]The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a().
A. fish trap area
B. pipeline
C. demarcation line
D. cable area
[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 runs out of fuel, you can expect trouble from ()
A. overheated injection pumps
B. water condensation in the cylinders
C. fuel dilution of the lube oil
D. air in the fuel system
[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]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]An engine compartment gasoline fire requires which type of extinguisher?()
A. Carbon dioxide
B. Dry chemical
C. Foam
D. All of the above
[单项选择]Which statement about diesel engine combustion is true?()
A. Combustion does not begin until the piston starts down on the power stroke
B. Maximum combustion pressure is reached before TDC
C. Turbulence in the cylinder causes a delay in ignition
D. Maximum cylinder firing pressure is not developed until the piston passes TDC
[单项选择]The three conditions which cause engine shutdown are overspeed,low lube oil pressure,and().
A. High lube oil pressure
B. High jacket water pressure
C. High jacket water temperature
D. Low jacket water pressure
[单项选择]Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?()
A. Intake manifold
B. Water-cooled exhaust system
C. After-cooler
D. Exhaust diffuser
[单项选择]Which of the diesel engine cylinder liners listed has internal cooling water passages?()
A. Internally finned liner
B. Externally finned liner
C. Wet liner
D. Integral water-jacket liner
[单项选择]Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()
A. Impeller
B. Compressor
C. After-cooler
D. Exhaust differ
[单项选择]Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?()
A. Exhaust temperature
B. Lube oil level
C. Lube oil pressure
D. Water level in the expansion tank
[单项选择]Which is false about engine trials?()
A. engine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air briefly
B. in the operation of engine trails, the main engine should be running in low-speed
C. As to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same time
D. the order “engine trials” should be given by the bridge
[单项选择]Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?()
A. Lubrication
B. Cooling
C. Fuel
D. Electric ignition