Complete the following sentences.
1 Road locomotives are locomotives designed to.
2 Depending on their source of power, there are three main kinds of locomotives:..
3 Railroads no longer use ..locomotives
4 have a diesel engine that works by compressing air in chambers called cylinders.
5 A diesel locomotive may be a These units are of two general types, called A and B
6 In the United States, railroads often use locomotives with six or even more units to..
7 Three types of diesel locomotives: diesel-electric, diesel-hydraulic, and diesel-mechanical transmit...
8 In diesel-electric locomotives, the engine a generator, which ...
9 Electric locomotives use electric power supplied by..
10 A hinged steel framework is called connects the wire with the locomotive.
11 An electrified rail network .because of the wires and other special equipment involved.
12 Steam locomotives produce heat by.
13 Steam locomotives have several disadvantages such as.
Exercise 6
Give the Comparative and Superlative Degrees:
Tremendous, independent, long, quickly, fast, common, new, electric, technical, complicated, automatic, wide, different, excellent, high.
Exercise 7
Form 11 sentences combining suitable parts of the sentence given in columns 1 and 2
.
Gas something such as wood, coal, oil, or petrol that is burned in order to provide heat or power
Locomotive a piece of machinery in an engine in which a piston moves backwards and forwards
Turbine an internal combustion engine in which oil is burnt by very hot air. They are often used in trains, buses or lorries.
Cylinder a machine or engine in which power is produced when a stream of air, gas, water or steam pushes the blades of a wheel and makes it turn round
Diesel engine the same as a railway engine
Shaft a system of controlling a machine or a vehicle from a distance by using radio or electric signals
Power is the mechanism which allows the power from the engine to be disconnected from the wheels when you change gear.
Remote control often consists of wheels with teeth around their edges that fit into the teeth of another wheel or into the holes of a chain.
Fuel a rod or bar in a machine, for example in a car engine, that turns round and round in order to transfer power or movement.
Gear a substance like air that is neither liquid nor solid and burns easily.
Clutch is the energy that is obtained by burning a fuel or by using the wind or sun, especially when it is used to make a machine work or to produce electricity.
Exercise 8
Pick out the words from the text having the same roots with the words given below.
, , , , , , , , , , , , , , .
