CPL Aircraft General Knowledge 2

Question 1

What is the primary purpose of a magneto in a reciprocating aircraft engine?

Accepted Answer

To generate high-voltage current for ignition independent of the aircraft's electrical system

Answer

To provide electrical power to the aircraft's avionics

Answer

To regulate fuel flow to the engine cylinders

Answer

To control the timing of valve opening and closing

Question 2

Carburetor ice is MOST likely to form when outside air temperature and relative humidity are:

Accepted Answer

Temperature between 20°F and 70°F (-7°C to 21°C) with high humidity

Answer

High temperature, low humidity

Answer

Temperature below 0°F (-18°C) with any humidity level

Answer

Temperature above 80°F (27°C) with high humidity

Question 3

A constant-speed propeller governor controls propeller blade pitch to:

Accepted Answer

Maintain a selected RPM regardless of airspeed or power changes

Answer

Maximize thrust at all airspeeds regardless of RPM

Answer

Reduce propeller noise during cruise flight

Answer

Prevent engine over-speeding only during descent

Question 4

Detonation in a reciprocating engine is best described as:

Accepted Answer

Uncontrolled, explosive combustion causing excessively high cylinder pressures

Answer

Normal progressive combustion that produces maximum power

Answer

Pre-ignition caused by hot carbon deposits in the cylinder

Answer

Incomplete combustion resulting from an over-rich mixture

Question 5

A turbocharger improves high-altitude performance primarily by:

Accepted Answer

Using exhaust gases to compress intake air and maintain manifold pressure

Answer

Cooling intake air to increase oxygen density

Answer

Increasing fuel flow proportionally with altitude gain

Answer

Reducing exhaust back-pressure to improve engine efficiency

Question 6

Which condition would MOST likely cause roughness and power loss in a fuel-injected engine (not a carbureted engine)?

Accepted Answer

Induction system ice blocking the air intake

Answer

Carburetor ice forming in the fuel-air metering unit

Answer

Vapor lock in the fuel injection lines

Answer

Excessive fuel pressure from the engine-driven pump

Question 7

If oil pressure drops below the minimum limit in flight, the correct pilot action is to:

Accepted Answer

Reduce power and land at the nearest suitable airport as soon as practical

Answer

Increase power to improve oil circulation and monitor the gauge

Answer

Switch to the alternate oil pressure system and continue

Answer

Ignore the indication if the oil temperature is normal