1lesson-4高级值班机工英语听力与会话Part Warm-up Activities Useful Expressions1. Gear pumps belong to the positive displace pump.2. How about No.1 generator?3. May I give the main engine a brief trail?4. It is driven by an electric motor.5. How often do you test?6. There used to be a foreign-made one.7. Replace it with a new one.8. A water- tube boiler has many advantage over the fire-tube boiler.9. It is only a makeshift.10. The ship will go to the next port of call.Unit 2 Daily English Room Business2lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话3lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话4lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话5lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话6lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话7lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话8lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话9lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话10lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话11lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话12lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话13lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话14lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话15lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话16lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话17lesson-4高级值班机工英语听力与会话湖北交通职业技术学院港口与航运系湖北交通职业技术学院港口与航运系高级值班机工英语听力与会话高级值班机工英语听力与会话18lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话19lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话20lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话21lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话22lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话23lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话24lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话25lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话26lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话27lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话28lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话29lesson-4高级值班机工英语听力与会话1. Talk about the auxiliary machinery in the engine room.The auxiliary machinery is much more in number. They are not as big as the main engine. They include the generators, the boilers, the fresh water generators, the pumps and the steering gear, the windlass, the winches and cranes. They are very important for voyage. Without them, the ship cant sail at sea.2. Describe the two types of boilers on board.There are two distinct types of marine boilers in use on board ship, the fire-tube boiler in which the hot gases from the furnaces pass through the tubes while the water is on the outside, and the water-tube boiler in which the water flows through the inside of the tubes while the hot furnace gases pass around the outside. The water-tube boiler is employed for high pressure, high temperature, high capacity steam applications, e.g. providing steam for main propulsion turbines or cargo pump turbines. Fire-tube boilers are used for auxiliary purposes to provide smaller quantities of low pressure steam on diesel engine powered ships.3. Talk about oil treatment.Both fuel oil and lubricating oil require treatment before passing to the engine. This will involve storage and heating to allow separation of water present, coarse and fine filtering to remove solid particles and also centrifuging. 30lesson-4高级值班机工英语听力与会话高级值班机工英语听力与会话高级值班机工英语听力与会话31lesson-4高级值班机工英语听力与会话