单选题 The main body of the induction motor comprises of two major parts______.

A、 Magnetic field and winding

B、 stator and rotor

C、 exciter and armature

D、 motor and stator

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单选题 The two-stroke cycle engine, with one working or power stroke every revolution, will, theoretically, develop ______ the power of a four-stroke engine of the same swept volume.

A、as much as

B、less than

C、twice

D、twice as many as

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单选题 Why are the scavenging ports are drilled in the liners at a certain angle?

A、Because in this way the scavenging air is given a rotary movement.

B、Because the scavenging air will flow into the cylinder at an angle of 20 degree.

C、Because the scavenging air will flow straight into the cylinder.

D、Because the amount of the scavenging air will be controlled.

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单选题 From the passage, we may infer that the oil supplied to the engine may be____ (1) at approximately 130℃ C-150℃ C; (2)at 6-16bar; (3) between 380 -700cSt; (4) at 50℃ C (缺图)

A、(3)+(4)

B、(1)+(2)

C、(3)+(2)

D、(2)+(4)

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单选题 Which one of the following items is NOT shown in the Figure? (缺图)

A、Level switch

B、Low Temperature transmitter

C、High Temperature transmitter

D、Viscosity transmitter

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单选题 The excess oil from the engine will return to____. (缺图)

A、Mixing tube

B、Daily service tank

C、Engine and circulate again

D、Oil heater

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单选题 The four-stroke engine is used for auxiliaries such as alternators and sometimes for main propulsion with ______ to provide a propeller speed of between 80 and 100 rev/min.

A、a control box

B、a governor

C、a monitor

D、a gearbox

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单选题 What is the function of tie rods?

A、To fix the cylinder covers and the liners together.

B、To support the cylinder.

C、To secure the bedplate, frames and cylinder blocks together.

D、To stiffen the foundation of the engine.

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单选题 Why high pressure is maintained? (缺图)

A、to maintain proper oil viscosity

B、to avoid vaporization of water and light parts of oil

C、to obtain good atomization

D、to avoid lose-suction

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