Chapter 5.1 - Exam Review

Question 1

Which components of a Piston Engine provide the chamber for combustion of the Fuel-air Mixture?

Answer 1

The Cylinders.

Question 2

The power generated by the pistons is transmitted by the (rotating Engine crankshaft/connecting rod) to the propeller where it is converted into thrust?

Answer 2

Rotating Engine Crankshaft.

Question 3

The Engine component which converts the reciprocating (up and down) motion of the piston into the rotary motion of the crankshaft is the (camshaft/connecting rod)?

Answer 3

Connecting Rod.

Question 4

What Engine components are housed in the cylinders (4)?

Answer 4

• Valves.
• Spark Plugs.
• Pistons.
• Piston Rings.

Question 5

How many spark plugs are housed in each cylinder of a typical training Aircraft Piston Engine?

Answer 5

Two.

Question 6

The force due to combustion is transmitted to the connecting rod by the (pistons/camshaft)?

Answer 6

Pistons.

Question 7

One function of the (valves/piston rings) is to prevent any leakage of combustion pressure from around the pistons which would results in a loss of power?

Answer 7

Piston Rings.

Question 8

Another function of the piston (scraper) rings is to prevent (gas/oil) escaping past the piston into the combustion chamber?

Answer 8

Oil.

Question 9

The purpose of the camshaft is to carry ‘cams’ to actuate the valve lifting mechanism at the appropriate time. Which valves are involved (2)?

Answer 9

• Inlet Valves.

- Exhaust Valves.

Question 10

The function of the inlet valve is to open independently in order to allow the (burnt gases/fuel-air mixture) into the cylinders at the correct time?

Answer 10

Fuel-air Mixture.

Question 11

The Piston Engine in a typical training Aircraft operates on the four-stroke cycle. Name the strokes in their correct order?

Answer 11

• Intake.
• Compression.
• Power.
• Exhaust.

Question 12

Why do both the inlet and exhaust valves remain closed during the power stroke?

Answer 12

To prevent the combustion from escaping.