更多"（） is a source of power by which th"的相关试题:
[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]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]A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）
A. fuel droplets will burn as they leave the fuel injector
B. fuel will not be properly atomized in the cylinder
C. maximum expansion of the burned fuel cannot take place in the cylinder
D. compression pressure will be too low to cause fuel ignition
[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]If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）
A. Fuel
B. Lubricating
C. Cooling
D. Ignition
[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]As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
A. Exhaust temperatures
B. Raw water pressure
C. Lube oil pressure
D. Air box pressure
[单项选择]The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.
A. turbocharger stalls
B. exhaust pressure increases
C. air charge density decreases
D. scavenge effect increases
[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
[单项选择]A device which functions to bring a diesel engine to a full stop to protect it from damage is known as a/an （）
A. torque limiter
B. over-speed trip
C. over-speed governor
D. load limit governor
[单项选择]In a diesel engine lube oil system, which of the following parts should be lubricated first?（）
A. Camshaft beatings
B. Main bearings
C. Piston crowns
D. Cylinder walls
[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]The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A. principle
B. principal
C. cause
D. case
