更多"The major cause of problems occurri"的相关试题:
[单项选择]The major cause of fuel pump and injection system problems is （）
A. improper adjustments
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
[单项选择]Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）
A. Defective temperature controls in the system
B. Cavitation in the cooling water pump
C. Opened vent in the cooling system
D. Restricted water passages in the engine
[单项选择]Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）
A. Faulty turbocharger turbine diffuser ring
B. Faulty turbocharger compressor ring
C. Insufficient cooling water flow
D. Clogged air intake filters
[单项选择]Which of the following problems could cause air to blow out through the inlet air filter of a running compressor?（）
A. Excessive compression in the cylinder
B. A broken intake valve
C. A dirty inlet filter element
D. An improperly adjusted discharge valve
[单项选择]Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
A. A shortage of liquid refrigerant
B. Excessive frost on the evaporator
C. Excessive condenser cooling water
D. Insufficient condenser cooling water flow
[单项选择]The major cause of anchor buoy pendant wire failures is（）.
A. corrosion
B. rough weather
C. defective sockets
D. mishandling
[单项选择]The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）
A. dirt
B. fuel oil
C. governor cooling water
D. fuel oil tars
[单项选择]The doctor said that mental （） is the major cause of his sleeping problem.
A. tension
B. sadness
C. anger
D. relaxation
[单项选择]Problems with the diesel engine fuel injection pump are usually caused by（）
A. improper adjustment
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
[单项选择]Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）
A. low exhaust temperature
B. low firing pressure
C. fuel knock in each cylinder
D. mechanical knock in each cylinder
[单项选择]What is LEAST likely to cause ignition of fuel vapors?（）.
A. Static electricity
B. An open running electric motor
C. Loose wiring
D. Explosion proof lights
[单项选择]One cause of high head pressure occurring in a refrigeration system can be （）.
A. insufficient cooling water flow to the condenser
B. a low refrigerant charge in the system
C. the liquid valve is open too much
D. high evaporator superheat
[单项选择]Air in the fuel can cause（）
A. high lube oil temperature
B. blue smoke
C. the engine to stop
D. piston seizure
[单项选择]The most common diesel engine fuel system problems are caused by （）.
A. incorrect adjustments
B. dirty fuel
C. broken fuel lines
D. excessive vibration
[单项选择]Which of the problems listed represents the major difficulty encountered with thermal expansion valve operation?（）
A. Lube oil passing through the system
B. Moisture or foreign matter collecting at the valve seat and orifice
C. Variable spring tension caused by the changing temperature
D. Frost on the liquid line
[单项选择]Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）
A. clogged air filter
B. compression stroke
C. burned exhaust valves
D. all of the above
[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]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]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
