Piston Engines - Lubrication: DGCA Technical General questions

Question 1

The purpose of the crankcase breather is to:

Accepted Answer

prevent pressure building up inside the crankcase.

Answer

maintain the pressure in the oil tank at atmospheric pressure.

Answer

ease the task of the oil scraper ring.

Answer

prevent distortion of the crankcase.

Question 2

Engine oil pressure is:

Accepted Answer

relatively unaffected by engine speed.

Answer

low at idle rpm and high at high rpm.

Answer

controlled by the oil cooler.

Answer

substantially decreased when the oil pressure relief valve opens.

Question 3

Oil returning to the oil tank is filtered by:

Accepted Answer

the scavenge filter.

Answer

the oil pressure filter.

Answer

the oil tank filter.

Answer

a micron size multi-bore filters assembly.

Question 4

In a wet sump oil system, the oil is contained in the:

Accepted Answer

engine and sump.

Answer

engine and tank.

Answer

tank and oil cooler.

Answer

sump and tank.

Question 5

The extra space in the oil tank is to cater for:

Accepted Answer

frothing and aeration of the oil as it passes through the engine.

Answer

fire protection.

Answer

the accommodation of extra oil contents on long duration flights.

Answer

anti-surge action.

5 more questions in this chapter, free with an account