轮机英语听力与会话第三版口述题答案和问题答案

轮机英语听力与会话三版口述和问答题答案

第一章

口述

1． The engine room is the heart of a ship. It is generally located at the stern near the ship bottom. In the engine room,

there are a lot of machinery and systems, such as the main engine, the generater engine, boilers, pumps, the ，is the unattended for long periods. That is UMS.

第二章

口述

1. engine is diesel oil or fuel oil, while that for a gasoline engine is gas oil. 2) is ignited through compression of hot, high pressure oil/air mixture, but the gasoline engine is spark plug. 3) for

2. First, I will tell the cadet the importance the engine room. Second, I should introduce the various machinery and

the air conditioning system. Third, I will show him how to the equipment and devices safely, and introduce as much safety knowledge as I can.

3. same as question No 2.

4. The power of the diesel engine is transmitted the transmission system. The items of

transmission system include various shafts, one or more intermediate shafts and tail shaft. 5. has two.

6. The structure is as follows: the construction mainly include bedplate, frame,

main bearing and crankshaft. The crankshaft rests in main bearings built into the bedplate. On the top of A frames there is a scavenging air box. The long tie-rods. A piston consists of a lower 7. shown in the illustration mainly include the piston, the connecting rod, and the

are all critical parts of the engine. According to the specific condition shown in the picture, the piston is under compression force, the connecting rod is under tension stress and compression force, while the crankshaft is under the torsion forces.

8. Pistons can be divided into two main classes: the crosshead type pistons and the trunk type pistons. The

top surface of the crosshead piston can be flat, sunken or convex. The piston shown in the illustration is the crosshead type piston with a sunken surface. It has the advantage of increasing the air turbulance and imporvingthe oil/air mixing quality. Its disadvantage is that the cylinder volumetric clearance will be larger.

9. The piston rings shown in the illustration has the shape of rectangle or trapezoid. Some of them are