Gas Turbines - Thrust: DGCA Technical General questions

Question 1

On a part throttled engine, take-off thrust would be achieved:

Accepted Answer

at less than full throttle position

Answer

later than normal due to pressure in the compressor being low

Answer

later than normal due to the EPR being low

Answer

later than normal due to the EPR being high

Question 2

In a high bypass engine whose fan max rpm is 20000 rpm, when turning at 5000 rpm will develop approx.

Accepted Answer

5% take-off thrust

Answer

25% take-off thrust

Answer

50% take-off thrust

Answer

15% take-off thrust

Question 3

On a turboprop aircraft with a 14 stage axial flow compressor while climbing it will experience:

Accepted Answer

decrease shaft horsepower / decrease jet thrust / decrease fuel consumption

Answer

increase shaft horsepower / increase jet thrust / increase fuel consumption

Answer

decrease shaft horsepower / increase jet thrust / decrease fuel consumption

Answer

decrease shaft horsepower / decrease jet thrust / increase fuel consumption

Question 4

In a gas turbine engine:

Accepted Answer

thrust is maximum and ram pressure at minimum at the start of the take-off run

Answer

ram pressure is maximum at the start of the take-off run

Answer

ram pressure is unaffected by airspeed

Answer

thrust is unaffected by the aircraft's forward speed

Question 5

The maximum thrust that a jet engine can develop will be:

Accepted Answer

max static thrust

Answer

take-off thrust

Answer

go around thrust

Answer

max climb thrust

4 more questions in this chapter