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大管轮英语评估试题(1)

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大管轮英语评估试题(1),是针对大管轮轮机英语的模拟试题库。

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1
The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is .
  • A.they operate between 150 and 450 rpm
  • B.they are connected to the propeller by gearing
  • C.their smaller size and weight
  • D.they can be connected directly to the propeller without gearing
2
The SMS should provide for specific measures aimed at promoting the of equipment or systems, the sudden operational failure of which may result in hazardous situations.
  • A.visibility
  • B.ability
  • C.reliability
  • D.capability
3
If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two stroke/cycle diesel engine will develop approximately
  • A.the same indicated horsepower as a four-stroke/cycle engine
  • B.twice the indicated horsepower as a four-stroke/cycle engine
  • C.one half the indicated horsepower as a four-stroke/cycle engine
  • D.one power stroke for every two crankshaft revolutions
4
The desirable properties of a marine fuel oil should include .
  • A.high flash point and high viscosity
  • B.low flash point and high viscosity
  • C.low heating value and high sulphur content
  • D.high heating value and low sulphur content
5
The plunger in a jerk pump is rotated until the release port is uncovered If the port remains uncovered all of the time, which of the listed operations will occur?
  • A.No fuel will be delivered
  • B.The maximum effective stroke will be attained
  • C.The fuel delivered to the cylinder will be excessive
  • D.The injection nozzle will overheat and carbonize
6
In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the
  • A.crosshead
  • B.crankpin
  • C.crank journal
  • D.gudgeon pin
7
Due to action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.
  • A.reciprocating
  • B.rotating
  • C.running
  • D.removing
8
What is the function of the after-coolers installed in the diesel engine air intake system?
  • A.Decrease the air density
  • B.Increase the exhaust temperature
  • C.Decrease the lube oil temperature
  • D.Increase the air density
9
Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.
  • A.cooling water
  • B.compressing air
  • C.compressed air
  • D.cylinder oil
10
If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will .
  • A.have a larger than normal dead band
  • B.produce excessive speed response to a load change
  • C.respond slowly to any change in engine load
  • D.stabilize engine speed at the new governor setting
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