Exercise 6. Ask the questions to the missed parts of the sentences.

Exercise 6. Ask the questions to the missed parts of the sentences.

1)A source of power in an airplane… .

2)The … engine relies entirely upon the jet thrust.

3)Usually all turbofans are called … .

4)All rockets are divided into … basic types.

5)A … engine differs little from a turbofan.

6)… , are subdivided into turbojet, turboprop, turbofan or by-pass and turboshaft engines.

7)The piston engines are also called … .

Exercise 7. Answer the question to the text.

1)What does the power plant consist of?

2)What requirements must the aircraft engine meet?

3)What main types of aviation engine are there?

4)What groups are jet engines divided into?

5)What is also called the internal combustion engine?

6)How are usually all turbofan engines called?

 

Exercise 8. Complete the sentences.

1)The aircraft engine must meet the following requirements: low weight, low cost and … (надежность).

2)Jet engines are divided into three main groups: gas turbine engines, rocket and … (прямоточный воздушно-реактивный двигатель).

3)A turbofan engine differs little from … (турбовинтовой двигатель).

4)Instead of the propeller the turbofan engine has an axial-flow fan to be driven at … (скорость двигателя).

5)If the turbine of a gas turbine engine is connected to a drive shaft which, in addition to the compressor, drives some other unit than a propeller such as helicopter rotors, the engine is called … (турбовальный двигатель).

 

Exercise 9. Put questions to the stressed words.

1)  Instead of the propeller the turbofan engine has an axial-flow fan.

2)Gas turbine engines are widely used in civil aviation.

3)Gas turbine engines are subdivided into turbojet, turboprop, turbofan and turboshaft engines.

4)Turboshaft engines are used in helicopters.

5)The turbojet engine relies entirely upon the jet thrust.

6)A source of power in an airplane is the power plant.

7)Usually all turbofan engines are called by-pass engines.

8)The piston engine is also called an internal combustion engines.

9)The power plant consists of the engine or engines and different systems.

10)All rockets are divided into liquid propellant rocket engines and solid propellant rocket engines.