單項選擇題What is the function of the thrust bearing?()

A.Prevents lateral movement of the slow speed gear
B.Transmits propeller thrust to the hull
C.Keeps spring bearings in line
D.Prevents main reduction gear axial movement


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1.單項選擇題Lube oil filters remove contaminants more efficiently if the oil being filtered is ().

A.under high pressure
B.under low pressure
C.heated to reduce viscosity
D.cooled to increase viscosity

2.單項選擇題Proper filtering and straining of fuel oil is important because the ().

A.fuel oil pump will over-speed if dirt is not removed
B.fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil
C.fuel injectors may be damaged by foreign particles in the fuel oil
D.dirty fuel will clog the intake air filter

3.單項選擇題An automated diesel engine should normally shut down due to ()

A.low lube oil temperature
B.high ambient air temperature
C.low tube oil pressure
D.high exhaust system back pressure

4.單項選擇題The minimum speed an engine must attain before ignition can occur depends upon ().

A.the type and size of the engine
B.the condition of the engine
C.ambient temperature
D.all of the above

5.單項選擇題For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because ().

A.it has a longer power stroke
B.more air gets into the cylinder each stroke
C.it develops twice as many power strokes at the same speed
D.higher combustion pressure is developed

最新試題

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting ().

題型:單項選擇題

When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?()

題型:單項選擇題

To determine if the lube oil filter elements need changing, ().

題型:單項選擇題

For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because ().

題型:單項選擇題

A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST ().

題型:單項選擇題

In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().

題型:單項選擇題

The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as ().

題型:單項選擇題

Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the ().

題型:單項選擇題

If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().

題型:單項選擇題

Electrically operated safety devices on auxiliary diesel engines function to stop the engine by ().

題型:單項選擇題