更多"Which of the following conditions c"的相关试题:
[单项选择]Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）
A. Clogged air intake falters
B. Piston blow-by
C. A defective after-cooler
D. Faulty exhaust valves
[单项选择]Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）
A. Low lube oil temperature
B. Dirty lube oil strainer
C. Low lube oil pressure
D. High lube oil temperature
[单项选择]Which of the following conditions would cause carbon deposits to form in the piston ring belt of a diesel engine?（）
A. faulty combustion
B. excessive ring temperature
C. over lubrication
D. all of the above
[单项选择]Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?（）
A. Increased suction head pressure
B. Decreased feedwater temperature
C. Pump recirculating line being open too much
D. Excessive feedwater temperature
[单项选择]Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）
A. Leaking fuel injectors
B. Lower than normal compression
C. Delayed fuel injection
D. All of the above are correct
[单项选择]Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）
A. Decreased connecting rod bearing clearance
B. Increased connecting rod bearing clearance
C. Decreased compression ratio
D. Increased compression ratio
[单项选择]（）of the following conditions will cause a vessel’s bottom to be subjected to tension stresses.
A. Concentration of weight aft
B. Concentration of weight forward
C. Concentration of weight amidships
D. Concentration of weight at both ends of the vessel
[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]Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
A. Leaking seal ring
B. Insufficient heat transfer from the exhaust valves
C. Block cooling water passages to the head
D. Excessive scavenging air provided to the engine
[单项选择]Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）
A. The oil oxidizes and forms carbon deposits
B. The viscosity increases
C. Engine oil consumption decreases
D. Lubricating qualities of the oil are enhanced
[单项选择]Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）
A. Air will enter the cooling system
B. Carbon will plug the water cooled exhaust manifolds
C. The jacket water temperature will rise
D. The lube oil viscosity will increase
[单项选择]Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）
A. Water discharging from the water outlet of the lube oil purifier
B. Fuel oil discharging from the water outlet of the lube oil purifier
C. Lube oil discharging from the water outlet of the lube oil purifier
D. A change in the lube oil viscosity
[单项选择]Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?（）
A. The mixture is too lean to burn
B. The mixture is too rich to burn
C. The vapor is about to explode
D. Conditions are perfect for combustion
[单项选择]Which of the following conditions may contribute to the formation of deposits on the blades of the turbocharger turbine?（）
A. Poor combustion
B. High cylinder oil consumption
C. Leaking exhaust valves
D. All of the above
[单项选择]Which of the following conditions may be attributed to a fouled turbocharger compressor inlet screen or filter?（）
A. Decreasing scavenge air pressure
B. Increasing exhaust temperatures before the turbine
C. Reduction in engine speed
D. All of the above
[单项选择]Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?（）
A. Ignition lag increases
B. Lube oil system pressure increases
C. Brake specific fuel consumption increased
D. Mechanical efficiency increaded
[单项选择]Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）
A. Lube oil is diluted and its viscosity is reduced
B. Sulfuric acid is formed
C. Bearings become pitted ad immediately fail
D. Valve stems develop sludge deposits
[单项选择]Which of the following conditions must exist for heat to flow from one object to another?（）
A. The two objects must be in physical contact
B. The two objects must be the same size
C. There must be an existing temperature differential
D. There must be an existing weight differential
[单项选择]Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
A. Injection pressures
B. Control air supply pressure
C. Cooling water flow through after-coolers
D. Lube oil temperature
