轮机部三管轮考试模拟题1(轮机英语)
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The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the _____.
- A.control rack
- B.delivery valve
- C.governor speed
- D.plunger crossbar
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The steady state difference between the control point and the value of the controlled variable, corresponding with the set point, is known as __________.
- A.dead band
- B.control point
- C.deviation
- D.offset
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The purging of air from an elector-hydraulic steering gear unit is necessary when .
- A.changing over to hand pump operation
- B.engaging the trick wheel
- C.the system has been filled with new oil
- D.the rudder angle indicator does not match the helm position
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Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?
- A.Defective temperature controls in the system
- B.Cavitation in the cooling water pump
- C.Opened vent in the cooling system
- D.Restricted water passages in the engine
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The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of eventsWhat does "which" mean in this sentence?
- A.a working cycle
- B.the operation
- C.two fuel injections
- D.events
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During repair, lubrication lines and orifices must be _____.
- A.taken away
- B.engaged
- C.connected
- D.sealed off
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Which of the following about ISM Code is not right? .
- A.It aims to ensure safety at sea
- B.It aims to avoid damage to the environment
- C.It aims to prevent human injury or loss of life
- D.It aims to provide a method to run a company
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In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the _____.
- A.trick-wheel
- B.follow-up control
- C.six-way valve
- D.Rapson slide
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In ______the control action is independent on the output.
- A.a closed loop control system
- B.an open loop control system
- C.a boiler control system
- D.a steering gear
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The load limitation of governor should be reduced when ship navigating at sea, the main reason is to .
- A.prevent the diesel engine surging
- B.prevent governor from being damaged because of swing
- C.reduce the probability of the crank shaft being torsional vibrated and resonated
- D.prevent the main engine being overload or overspeed
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