單項(xiàng)選擇題Heat damage to fuel injection nozzles can be prevented by avoiding ()

A.excessive fuel oil temperature
B.long periods of engine overload
C.metallic contact between nozzles and cylinder heads
D.hard carbon deposit and varnish on the nozzles


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1.單項(xiàng)選擇題Critical speed in diesel engines occurs when engine torque pulsations become ()

A.opposed to the crankshaft rocking couple
B.resonant with the crankshaft natural frequency
C.critical fore and aft crankshaft vibrations
D.horizontal whipping motions of the crankshaft

2.單項(xiàng)選擇題Air receivers installed in starting air systems are to be ().

A.cylindrical in shape with service connections located at the top and bottom
B.opened and made available for inspection during biannual inspections provided
C.with automatic drain traps for the removal of moisture
D.so installed as to make the drain connections effective under extreme conditions of trim

3.單項(xiàng)選擇題Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? ()

A.Hydraulic stress and distortion will develop
B.Hot spots will develop
C.Fuel oil viscosity will increased
D.An increase in trapped deposits of scale and dirt

4.單項(xiàng)選擇題The two strokes of a two-stroke/cycle diesel engine are ()

A.power and intake
B.intake and exhaust
C.exhaust and compression
D.compression and power

5.單項(xiàng)選擇題Which of the items listed causes a direct acting mechanical governor to operate the engine fuel control linkage?()

A.Hydraulic oil pressure
B.Servomotor action
C.Flyweight centrifugal force
D.Relay motion

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To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()

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One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()

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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()

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A purge recovery system is used in a centrifugal air conditioning or refrigeration system to ()

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The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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Engine parameters shall be corresponded to NOx Technical Files. This is required by ()

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“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()

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The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()

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The ISPS Code consists of a mandatory section-Part A, which shows()

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During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.

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