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Gas Turbine Principle Quiz

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Questions and Answers

What is the primary function of the compressor in a gas turbine?

To discharge compressed air into the combustion chamber (correct)

To expand the hot air through the turbine

To add fuel and burn it

To draw air into the turbine

What is the effect of higher combustion temperature on the efficiency of a gas turbine?

Does not affect efficiency

Stops the operation of the turbine

Increases efficiency (correct)

Decreases efficiency

What determines the output power (power rating) of a gas turbine?

The mass of hot gas flowing through it per unit time (correct)

The type of fuel used in the combustion chamber

The temperature of the air entering the turbine

The speed of the compressor

Why is it best to operate gas turbines at the maximum possible temperature that its construction materials can handle?

To enhance efficiency Signup and view all the answers

What effect does cold air at the compressor intake have on gas turbine output?

Increases output Signup and view all the answers

What is the role of the combustion chamber in a gas turbine?

To add and burn fuel to heat the air Signup and view all the answers

What provides power in a simple gas turbine?

The expansion of hot air through the turbine Signup and view all the answers

What type of gas turbine is derived from the jet engines used in aircrafts?

Aeroderivative gas turbine Signup and view all the answers

In which type of gas turbine are the combustion chamber and the engine body separated?

Heavy-duty gas turbine Signup and view all the answers

Which type of gas turbine has a two-stage centrifugal compressor?

Aeroderivative gas turbine Signup and view all the answers

What is the design of a typical turboprop aircraft engine like?

Two turbines, one drives the compressor and the other drives the propeller Signup and view all the answers

Which type of gas turbine draws the air used to drive the turbine from the atmosphere?

Open-cycle gas turbine Signup and view all the answers

What is an essential auxiliary for a gas turbine, as it is not self-starting?

Starting motor Signup and view all the answers

What does a simple gas turbine lack?

Heat exchanger and regenerators Signup and view all the answers

What is a characteristic of a single shaft gas turbine?

It has only one shaft connecting the gas turbine and the compressor Signup and view all the answers

Study Notes

Gas Turbine Fundamentals

The primary function of the compressor in a gas turbine is to compress air for combustion.

Efficiency and Performance

Higher combustion temperature increases the efficiency of a gas turbine.
Operating gas turbines at the maximum possible temperature that its construction materials can handle is desirable.
Cold air at the compressor intake increases gas turbine output.

Power Generation

The output power (power rating) of a gas turbine is determined by multiple factors.
In a simple gas turbine, power is provided by the turbine.
The combustion chamber plays a crucial role in a gas turbine, where fuel is burned to produce hot gas.

Gas Turbine Types

An industrial gas turbine is derived from the jet engines used in aircraft.
In a twin-shaft gas turbine, the combustion chamber and the engine body are separated.
A turbojet engine has a two-stage centrifugal compressor.

Turboprop Engines

A typical turboprop aircraft engine combines a gas turbine engine with a propeller.

Air Supply and Starting

An open-cycle gas turbine draws the air used to drive the turbine from the atmosphere.
A starter motor is an essential auxiliary for a gas turbine, as it is not self-starting.

Characteristics

A simple gas turbine lacks a separate compressor and turbine.
A characteristic of a single shaft gas turbine is that it has a single shaft connecting the compressor, combustion chamber, and turbine.

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Description

Test your knowledge on the principles of gas turbines, including the process of air compression, fuel combustion, and power generation through turbine expansion.