The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.
A . interlocked
B . interconnected
C . interfered
D . interacted
相似题目
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The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.
A . gear
B . nonpositive displacement
C . positive displacement
D . rotary
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Under rotary pumps are the gear, （）, cam-and-piston and screw types.
A . reciprocating
B . diffuser
C . turbine
D . vane
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One of the main differences between the various types of screw pumps is in the （）.
A . stuffing box diameter
B . direction of rotation of the screws
C . pitch of the screws
D . type of driving gear
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The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）
A . fuel delivery pressure
B . pump plunger diameter
C . plunger control rack position
D . total pump stroke
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Which of the following correctly describe the various functions and virtues of a router?（）
A . Packet switching
B . Collision prevention on a LAN segment.
C . Packet filtering
D . Broadcast domain enlargement
E . Broadcast forwarding
F . Internetwork communicatio
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Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?（）
A . Close radial clearance between impeller hub and casing
B . Low rotational speed of impeller
C . Removable end plate
D . Replaceable impeller and casing wearing ring
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Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
A . fuel/water separators
B . day tanks
C . injector test stand
D . fuel filter
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The minimum number and capacity of bilge pumps and fire pumps and their distributing within the ship is governed by （）.
A . Classification Society Rules
B . National requirements
C . The IMO International Convention for the Safety of Life at Sea
D . All of the above
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The injection may be delayed, （）the pumps are in good order, if the fuel lines to the injection valves have not been cleared of air.
A . because
B . though
C . since
D . until
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（）the moveable plate and floating ring inside the pump is very difficult.
A . Having adjusted
B . Being adjusted
C . To adjust
D . Adjusted
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The International Load Line Certificate is a document indicating （） of the various load lines of the vessel．
A . decks
B . cabins
C . holds
D . positio
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The gear and screw pumps are classified as （）.
A . variable stroke pumps
B . multistage pumps
C . positive displacement pumps
D . triple-ported pum
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The major cause of fuel pump and injection system problems is （）
A . improper adjustments
B . contaminated fuel
C . kinked fuel lines
D . excessive engine vibratio
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The gear, screw, and vane pumps are all classified as （）.
A . variable stroke pumps
B . multistage pumps
C . positive displacement pumps
D . triple-ported pum
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The International Load Line Certificate is a document indicating the（）of the various load lines of the vessel.
A . decks
B . cabins
C . holds
D . positio
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In most pumps and pump motors overpacking the ball bearings full of grease will result in （）
A . moisture emulsification of the bearing grease
B . insufficient circulation and overheating of the bearing
C . proper grease circulation to cool the bearing
D . sliding friction between balls and race
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When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）
A . Secure all engine room doors，hatches，and vents
B . Close the fuel line valve
C . Check the spread of the fire with foam
D . Cast the barge off the wharf
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The injector pump is operated by a cam which drives the （） up and down.
A . piston
B . drum
C . plunger
D . barrel
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The lubricating oil is pumped from the drain tank, very often with （） in the suction line.
A . a filter
B . a strainer
C . a magnetic filter
D . a fine strainer
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The fuel booster pump and steam to fuel heater, together with fuel pipe heater tracer line should be shut off as soon as the （） order is acknowledged.
A . finished with engines
B . stop
C . stand by
D . full ahead
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The fuel injector pump is operated by （） which drives the plunger up and down.
A . a separate motor
B . a cam
C . a generator
D . a chai
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He tried the various almanacs, _____ and gazettes which were held in the library.
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1. _____ protects the cargo from the various natural and atmospheric conditions.
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Which of the following emphasizes the various components of communication including a sender／receiver, message, channel, and context（)
A、social science perspective
B、personal perspective
C、interpretive perspective
D、critical perspective
