Chapter 2.2 - PPL Aircraft General Knowledge

Question 1

Name three factors affecting Engine Performance?

Answer 1

• Mixture Strength.
• Height.
• Temperature.

Question 2

What is the name of the device which measures Fuel and Air in an Engine?

Answer 2

Carburettor.

Question 3

What is the name of the device which measures the airflow in a Carburettor?

Answer 3

Venturi.

Question 4

What is the ratio for Chemically Correct Mixture?

Answer 4

1:15.

Question 5

The Fuel/Air ratio corresponding to maximum EGT and minimum Fuel Consumption is called what?

Answer 5

Best Economy Mixture.

Question 6

What is the Mixture Ratio for Best Power?

Answer 6

1:12.5 to 1:13.5.

Question 7

What is the Mixture Ratio for Best Economy?

Answer 7

1:15 to 1:16.5.

Question 8

True or False. The Mixture Control should be set at FULL RICH before any power settings are made?

Answer 8

True.

Question 9

Name two reasons why the output of an Engine decreases during a climb?

Answer 9

• Atmospheric Pressure reduces the air to the Cylinders.

- Density of the air feeding the Engine.

Question 10

During a climb, how can the reduction of Atmospheric Pressure be compensated?

Answer 10

Progressively opening the Throttle.

Question 11

During a climb, how can the reduction of Density be compensated?

Answer 11

Increasing RPM.

Question 12

Which three primary Flight Instruments rely on Air Pressure?

Answer 12

• Airspeed Indicator.
• Vertical Speed Indicator.
• Altimeter.

Question 13

Which three primary Flight Instruments rely on Gyroscopic Pressure?

Answer 13

• Artificial Horizon.
• Heading Indicator.
• Turn Coordinator.

Question 14

What is Static Pressure?

Answer 14

The undisturbed pressure of atmosphere around the Aircraft.

Question 15

What is Dynamic Pressure?

Answer 15

The extra pressure generated by the air movement.

Question 16

What is Total Pressure?

Answer 16

The sum of Dynamic and Static Pressure.

Question 17

Static Vent Blockage: What happens to ASI in a climb?

Answer 17

ASI will under-read (lower IAS than actual).

Question 18

Static Vent Blockage: What happens to ASI in a descent?

Answer 18

ASI will over-read (higher IAS than actual).

Question 19

Static Vent Blockage: What happens to Altimeter?

Answer 19

It will read a constant height at which the blockage occurred.

Question 20

Static Vent Blockage: What happens to Altimeter in a climb?

Answer 20

Altimeter will under-read.

Question 21

Static Vent Blockage: What happens to Altimeter in a descent?

Answer 21

Altimeter will over-read.

Question 22

Static Vent Blockage: What happens to VSI?

Answer 22

It will read zero.

Question 23

True or False. A Pitot Tube blockage only affects the Airspeed Indicator?

Answer 23

True.

Question 24

Pitot Tube Blockage: What happens to ASI during Takeoff?

Answer 24

ASI will read zero.

Question 25

Pitot Tube Blockage: What happens to ASI during Straight and Level Flight?

Answer 25

ASI will remain constant.

Question 26

Pitot Tube Blockage: What happens to ASI during a climb?

Answer 26

ASI will indicate a higher IAS.

Question 27

Pitot Tube Blockage: What happens to ASI during a descent?

Answer 27

ASI will indicate a lower IAS.

Question 28

The Altimeter will over-read when flying into what kind of pressure/temperature area?

Answer 28

Low.

Question 29

What does the Red Line on an ASI indicate?

Answer 29

Never Exceed Speed.

Question 30

What does the Green Arc on an ASI indicate?

Answer 30

Normal Operating Speed Range.

Question 31

What does the Yellow Arc on an ASI indicate?

Answer 31

Caution Range.

Question 32

What does the White Arc on an ASI indicate?

Answer 32

Flaps Extension Range.

Question 33

True or False. IAS and TAS are equal at sea level?

Answer 33

True.

Question 34

True or False. IAS and TAS are equal at Altitude?

Answer 34

False. IAS is less than TAS due to decrease in density.

Question 35

What does EAS stand for?

Answer 35

Equivalent Airspeed.