轮机部三管轮考试题1(轮机英语)
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Forcing the exhaust gases form. the cylinder of an operating diesel engine with the aid of a blower is known as _________.
- A.scavenging
- B.forced draft
- C.turbo-charging
- D.aspiration
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Throttling in the _____ line of a centrifugal pump involves the risk of the pump cavitation.
- A.suction
- B.exhaust
- C.pressure
- D.discharge
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The accident resulted ______ the motorman’s carelessness.
- A.in
- B.to
- C.from
- D.by
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The function of lubricating oil is to _____.
- A.reduce friction between moving surfaces
- B.provide even distribution of bearing wear
- C.reduce the accumulation of harmful detergents
- D.maintain a constant oil temperature output at each beating
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In a diesel engine, works as working medium and changes the heat energy to mechanical energy, changes the reciprocating movement to rotary moment.
- A.fuel spray; the burning of the fuel
- B.the burned gas mixture; connecting rod
- C.medium shaft; crankshaft
- D.the burned gas mixture; piston rod
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The oil in a cargo winch gear box should be sampled periodically to _____.
- A.prevent the gear box from leaking
- B.prevent the oil from becoming inflammable
- C.make sure it has not become contaminated
- D.make sure the motor bearings are lubricated
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The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the .
- A.auto-ignition point
- B.flash point
- C.burning temperature
- D.fire point
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Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or capsThe installation process of these bearings requires sufficient ______.
- A.overlap
- B.crush
- C.lap or lead
- D.protrusion
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An axial piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned _____.
- A.radially from the shaft
- B.parallel to each other and to the shaft
- C.parallel to each other but at a right angle to the shaft
- D.at an angle to each other and to the shaft
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Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals.
- A.an injection process
- B.an ejection process
- C.a separation process
- D.a heating process
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