Oil System

Question 1

How does an oil coooler provided cooling capabilities?

Answer 1

It is exposed to the airflow

Question 2

What part of the oil system is exposed to the airflow?

Answer 2

Oil coooler

Question 3

How is oil viscosity affected by temperature?

Answer 3

High temperatures reduce viscosity

Question 4

What viscosity is preferred in especially cold operations?

Answer 4

Low viscosity

Question 5

Where does oil gather after doing work in the engine?

Answer 5

The sump

Question 6

What is a wet sump engine?

Answer 6

A sump that stores oil

Question 7

What is a dry sump engine?

Answer 7

Scavenge pumps draw oil from sump and baack to the oil tank

Question 8

What alleviates high oil pressure?

Answer 8

Oil pressure relief valve

Question 9

Where does an oil pressure gauge sit in the oil system?

Answer 9

After the pump and before the engine

Question 10

What instrument sits after the oil pump and before the enginee?

Answer 10

Oil pressure gauge

Question 11

What type of gauge is often used for oil pressure?

Answer 11

Bourdon tube gauge

Question 12

In a dry sump system, what are required to ensure the oil tank receives oil?

Answer 12

Scavenge pumps

Question 13

Where does an oil temp gauge sit in the oil system?

Answer 13

After the cooler and before the hot sections of the engine

Question 14

What instrument sits after the cooler and before the hot sections of the engine?

Answer 14

Oil temp gauge

Question 15

Of oil temp and pressure, what changes more gradually?

Answer 15

Oil temperature

Question 16

When reading oil temp and pressure, what gauge will adjust more quickly?

Answer 16

Oil pressure

Question 17

What is indicated by these symptoms:
Clogged oil line
Low quantity of oil
Malfunctioning temp gauge

Answer 17

High oil temperature

Question 18

High oil temperature may be a result of what major issue?

Answer 18

Low quantity of oil

Question 19

What is indicated by these issues:
Incorrect type of oil being used

Answer 19

Low oil temperature

Question 20

Low oil temperature indicates what?

Answer 20

Incorrect type of oil being used for cold weather

Question 21

How does a Bourdon tube gauge measure oil temperature?

Answer 21

Heated oil produces vapour
As temp increases, vapour pressure increases
Bourdon tube expands as vapour pressure rises (and vice versa)

Question 22

What substance does a Bourdon tube gauge rely on in measuring oil temp?

Answer 22

Oil vapour

Question 23

In relation to Bourdon tube gauges, what does oil produce when heated?

Answer 23

Vapour

Question 24

What is the principle of an electrical resistance thermometer?

Answer 24

Resistance increases as temperature increass

Question 25

An electrical oil thermometer reads oil temperature instead of what?

Answer 25

Resistance (ohms)

Question 26

What chemical changes does oil undergo over an operational period?

Answer 26

Oxidation and water absorption

Question 27

What consideration should be taken for oil when running in a new engine?

Answer 27

Straight oil should be used

Question 28

How are Ts and Ps affected if oil quantity is too low?

Answer 28

Ts are high and Ps are low

Question 29

Of all the Ts and Ps readings, what necessitates an emergency response?

Answer 29

Low oil pressure

Question 30

What usually accompanies a low oil pressure reading?

Answer 30

High oil temperature

Question 31

Aside from low oil quantity, what else might cause a high oil temperature reading?

Answer 31

Prolonged operation at excessive CHTs

Question 32

If climbing with high power and low airspeed, what might happen to Ts and Ps?

Answer 32

High oil temperature

Question 33

How could a low oil pressure reading be assumed to be faulty?

Answer 33

If oil temperature remains normal

Question 34

What issue would give a constant oil pressure reading but a rising oil temperature?

Answer 34

Gradual loss of oil

Question 35

A gradual loss of oil will have what effect on Ts and Ps?

Answer 35

Ts will rise, Ps will remain constant until oil is at critical level at which point Ps will suddenly drop