15.10 Lubricant System - 4q

Question 1

Functions of lubricating oil?

Answer 1

*reduce friction
*reduce temperature
*clean the system

Question 2

each bearing receives…

Answer 2

… a predetermined flow of oil at a predetermined pressure

Question 3

Hot oil tank?

Answer 3

The oil cooler is located in the pressure subsystem

Question 4

Cold oil tank?

Answer 4

Oil cooler located in the scavenge line

Question 5

Wet sump and Dry sump difference?

Answer 5

Wet sump - lubricating oil stored in the engine

Dry sump - lubricating oil stored in an external oil tank mounted on the engine

Question 6

In the pressure sub system what signals are sent to the flight deck and how are they sent there?

Answer 6

signals of pressure and temperature are sent to the flight deck by transmitters

Question 7

how is the bearing supplied with oil

Answer 7

A calibrated spray jet or metering device

Question 8

Pressure relief system?

Answer 8

Oil pressure is independent of engine RPM

over oils at low RPM and under oils at max RPM

Question 9

Scavenge pump capacity is how much greater than pressure pump?

Answer 9

1.5x greater

Question 10

Full flow system is different to pressure relief system how?

Answer 10

• pressure pump not as large
• Pressure relief valve is fitted as a safety device only and doesn’t open during normal operation

Question 11

Wide cut fuels are any fuels which?

Answer 11

Contain kerosene