Gas Turbines - Fuel Systems: DGCA Technical General questions

Question 1

Which of the following is a normal stopping device for a gas turbine?

Accepted Answer

HP shut off valve close

Answer

LP shut off valve close

Answer

Fuel tank booster pumps select off

Answer

Isolate electrics from engine

Question 2

Aircraft flying at FL420. If the booster pumps feeding the engine cease to work:

Accepted Answer

the LP pump will draw fuel from the tank, but there may be a possibility of cavitation due to the low pressure and low boiling point of the fuel

Answer

the engine would close down immediately

Answer

the LP pump will draw fuel from the tank, but there may be a possibility of cavitation due to the low pressure and higher boiling point of the fuel

Answer

the LP pump will draw fuel from the tank, but there may be a possibility of cavitation due to the higher pressure and higher boiling point of the fuel

Question 3

The effect of the high pressure compressor outlet pressure exceeding its maximum value would be:

Accepted Answer

pressure sensor input to fuel control unit (FCU), FCU reduce fuel, reduce rpm

Answer

pressure sensor input to fuel control unit (FCU), FCU increase fuel, increase rpm

Answer

pressure sensor input to fuel control unit (FCU), bleed valve open, bleed off excess volume of air

Answer

pressure sensor input to fuel control unit (FCU), bleed valve open, bleed off excess pressure

Question 4

In a fuel-cooled oil cooler the ............ is maintained ............ than the ............

Accepted Answer

oil pressure / higher / fuel pressure

Answer

fuel pressure / higher / oil pressure

Answer

oil pressure / lower / fuel

Answer

fuel pressure / same / oil pressure

Question 5

The fuel-cooled oil cooler:

Accepted Answer

heats the fuel and cools the oil

Answer

heats the oil and cools the fuel

Answer

heats the fuel only

Answer

cools the oil only

Gas Turbines - Fuel Systems: DGCA Technical General questions

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