轮机英语试题二十

试题二十

1.______of the A-frames there is a strong cast iron frame called the scavenging air box.

A. At the top

B. At the bottom

C. In the top

D. In the bottom

2.working with which of the following types of diesel engine arrangements is a waste heat

boiler most likely to produce the maximum steam pressure, temperature, and flow conditions?

A. Supercharged, four-stroke/cycle diesel engine.

B. Supercharged, loop scavenged diesel engine.

C. Turbocharged, crossflow scavenged diesel engine.

D. Turbocharged, return flow diesel engine.

3.The auxiliary engine and the a.c. generator can be connected with the______.

A. cam

B. crosshead

C. bulge

D. coupling

4.A: Please tell me the specification and quantity. B: ______.

A. Pump diesel oil first

B. 300 tons of 180 cSt fuel oil

C. The figure is all right

D. OK, I'll sign it

5.The lube oil to lubricate the surfaces of the cylinder liners is spread over by the ______.

A. sliding piston rings

B. engine's camshaft

C. small pumps

D. forced feed system

6. A lube oil filter can be used to remove most contaminants from lube oil. A contaminant

which will remain in the lube oil after filtering is ______.

A. abravise

B. fuel oil

C. sediment

D. impurities

7.______provide the water to the pistons.

A. Pneumatic pipes

B. Hydraulic pipes

C. Telescopic pipes

D. Operating gas

pipes

8. A high temperature alarm or ______which will melt is used to guard against the explosion of

compressor air pipelines.

A. a flame trap

B. a relief valve

C. a fusible plug

D. a bursting cap

9.The difference between a supercharged engine and an un-supercharged engine is that ______

operates at an increased pressure.

A. the later

B. the latter

C. the former

D. the farmer

10.Engage the flywheel with the ______.

A. turning gear

B. motor

C. driving gear

D. driven gear

11.Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ______.

A. apparent slip

B. true slip

C. pitch

D. propulsive efficiency

12.The timing of the injection can be altered by raising or lowering the pump ______ in relation

to the cam.

A. needle valve

B. cylinder

C. piston

D. arm rod

13.The process of loop scavenge is that the exhaust will be via ports______the air ports and

controlled by the same piston.

A. behind

B. far from

C. adjacent to

D. in front of

14.When the follower is on the base circle of the cam with a normal shape, the pump plunger is

at the ______of its stroke.

A. top

B. nip

C. bottom

D.

middle