General Knowledge

Question 0

What are the symptoms of detonation?

Answer 0

High and increasing CHT
significant power loss
Engine vibration
Pinging noise

Question 1

What is the stoichiometric system?

Answer 1

15 parts air to 1 part fuel

Best air to fuel ratio

Question 2

How would you rectify detonation?

Answer 2

Mixture rich
Reduce engine power
Increase IAS
Land and report

Question 3

What are the symptoms of pre ignition?

Answer 3

Rough running
Back firing
Rise in CHT
Engine damage

Question 4

How would you rectify pre ignition?

Answer 4

Mixture rich

Reduce engine power

Question 5

What are the minimum and maximum oil pressures?

Answer 5

Minimum=45 psi

Maximum=90 psi

Question 6

Define viscosity

Answer 6

High viscosity = thick and sticky oil

Low viscosity = thin and runny oil

Question 7

If engine torque is the same as prop torque what will RPM be?

Answer 7

Constant

Question 8

If engine torque is the greater than prop torque what will RPM be?

Answer 8

RPM will increase

Question 9

If engine torque is the less than prop torque what will RPM be?

Answer 9

RPM will decrease

Question 10

Describe fine pitch and what it’s best for?

Answer 10

Small blade angle
Small geometric pitch
Used for low airspeeds and climbing

Question 11

Define coarse pitch and what it’s used for?

Answer 11

Large blade angles
Large geometric pitch
Used for high airspeeds and cruise

Question 12

What does the constant speed unit do?

Answer 12

Maintain constant prop by changing pitch of variable pitch through command of governor.
Maintains max prop efficiency

Question 13

Define feather pitch

Answer 13

Blade chord line is parallel with aircraft relative airflow, minimising drag
Prop stops spinning
Mulit engine planes

Question 14

What does the governor do?

Answer 14

Maintains constant prop speed

Question 15

Describe McCauley System

Answer 15

Relies on oil pressure to move pitch to fine.

Seeks fine pitch due to CTM assisted by spring to return prop to fine

Question 16

Describe Hartzell System

Answer 16

Relies on oil pressure to move prop to fine pitch and counter weight on prop to move to coarse.

Question 17

What will happen if the speeder spring fails?

Answer 17

There would be no resistance to lifting force generated by fly weight. Governor would sense overspend causing blades to coarsen.
Large drop in RPM and performance

Question 18

A loss in oil pressure would result in what for the McCauley and Hartzell systems?

Answer 18

McCauley - blades move to fine pitch stop

Hartzell - blades move to coarse pitch stop

Question 19

What does the standby by battery provide power to?

Answer 19

PFD, ADC (air data computer), AHRS (attitude and heading reference system), Nav1 and Com 1