默认题库 - 船舶电气与船舶安全

单选题

During oil transfer operations, who would be responsible to guarantee that the posted transfer procedures are being followed?（）

A. The designated person in charge
B. The tanker man
C. The senior able seaman
D. The oiler

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单选题

The seven segment arrangement for numerical(数字的) display on consoles, test meters and other applications can be either（）

A. UJT or BJT
BCD or OCD
C. JFET or IGFET
D. LED or LCD

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单选题

In the management of the shafting, because（） carry heavy load and caused high temperature easily, it should be paid attention.

A. the bearing near to the diesel engine
B. the intermediate bearing near to the thrust bearing
C. the intermediate bearing near to the sterntube
D. the bearing located at the middle of the diesel engine and the sterntube

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单选题

In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）

A. improper venting of the cooling system
B. carrying the expansion tank water level too high
C. a totally clogged impeller in the cooling water pump
D. an incorrectly set cooling system temperature control

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单选题

Strainers, sometimes called （）, are devices designed to prevent the passage of unwanted solids into or further along a system.

A. dampers
B. filters
C. stopper circuits
D. separator

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单选题

If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）

A. a broken shaft on the freshwater pump
B. an excessive accumulation of scale exchanger
C. an incorrect thermostatic element operating range
D. lube oil in the cooling water

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单选题

Which of the turbo-charging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure?（）

A. Constant pressure
B. Pulse
C. constant velocity
D. Axial flow

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单选题

Propulsion of the vast majority of contemporary merchant ships (especially containerships and VLCCs) utilizes（） as prime mover.

A. gas turbine
B. diesel engine
C. steam engine
D. gasoline engine

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单选题

Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?（）

A. Reduce engine speed to idle before removing the filter
B. Soak the dirty filter in kerosene only
C. Blow out the air inlet with compressed air
D. Cover the air inlet after removing the filter

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单选题

For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable（）

A. throughput
B. additive percent
C. cetane number
D. TBN number

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