單項(xiàng)選擇題A hydraulic accumulator is designed to().

A.store fluid under pressure
B.act as a fluid reservoir
C.provide overpressure relief
D.replenish fluid to a system


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1.單項(xiàng)選擇題A fishing vessel that is required to have a fireman’s outfit,must have all of the following in the outfit except a().

A.flashlight
B.combustible gas indicator
C.self-contained breathing apparatus
D.fire axe

2.單項(xiàng)選擇題A fire starting by spontaneous combustion can be expected in which condition?()

A.Paints,varnish,or other liquid flammables are stowed in a dry stores locker
B.Inert cargoes such as pig iron are loaded in a wet condition
C.Oily rags are stowed in a metal pail
D.Clean mattresses are stored in contact with an electric light bulb

3.單項(xiàng)選擇題A double male coupling is one that().

A.has left hand twist
B.has inside threads on both ends
C.has outside threads on both ends
D.takes two men to operate

4.單項(xiàng)選擇題What is LEAST likely to cause ignition of fuel vapors?().

A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights

5.單項(xiàng)選擇題You are ordering ship’s stores. Which statement is TRUE?().

A.Stores such as line,rags,mattresses,linens,etc. must be treated to be fire retardant
B.Stores certified for use on uninspected vessels may be identified by the certification number used by Underwriter's Laboratories
C.A portable container of a flammable liquid used as fuel for portable auxiliary equipment must be stowed in a paint locker or at a designated open location
D.Acetylene may be in a ship's storeroom in quantities not exceeding 6000 cubic feet