默认题库 - 船舶电气与船舶安全

单选题

A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）

A. Hydraulic starting
B. Electric starting
C. Ignition
D. Fuel

单选题

Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）

A. De-energize the applicable switchboard bus
Bypass the interlocks
C. Secure and tag the supply circuit breaker in the open position
D. Station a man at the circuit supply switch

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单选题

When replacing a part with a spare one, we should fill in tile spare parts consume table in time and make a mark in brief for （）

A. the reason of replacing
B. the course of replacing
C. crews who do this work
D. where and when the replacing being done

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单选题

（）is a series of trials done at sea to determine whether the ship has met the specifications of design, modification, or repair.

A. SEA WORTHINESS
B. SEA TRIALS
C. TRIAL-AND-ERROR
DOCK TRIALS

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单选题

If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should（）

A. remove the discharge ring
B. re-prime the purifier
C. the centrifuge to its proper speed
D. install an additional discharge ring

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单选题

During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the（）

A. piston skirt
B. pinion
C. crosshead
D. compression ring

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单选题

（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.

A. Stray current
B. Rated current
C. Starting current
D. Earth current

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单选题

Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.

A. popular
B. common
C. in lead position
D. uncommo

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单选题

Which of the following components are used to convert alternating current produced in the generator windings to direct current?（）

Armature and equalizer
B. Commutator and brushes
C. Rotor and interpoles
D. Field and exciter

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单选题

Which of the following nondestructive testing methods can be used to detect a suspected subsurface defect in a tail-shaft liner?（）

A. Dye penetrant
B. Magnetic particle
C. Ultrasonic
D. All of the above

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