Which of the following is NOT one of the four strokes in a complete engine cycle?

• A) Intake

• B) Compression

• C) Ignition

• D) Exhaust

Which type of engine has a small frontal area, resulting in less drag?

• A) Radial

• B) Inline

• C) V-type

• D) Horizontally-opposed

What is the primary advantage of a radial engine?

• A) Simple design

• B) High fuel efficiency

• C) Good horsepower-to-weight ratio

• D) Low maintenance

Which fuel feed system allows for inverted flight?

• A) Gravity feed

• B) Forced feed

• C) Manual feed

• D) Pressure feed

What is the function of an oil cooler in a reciprocating engine?

• A) Lubrication

• B) Sealing

• C) Cooling

• D) Cleaning

How is the octane rating of aviation fuel determined?

• A) By the fuel's color

• B) By the engine's horsepower

• C) By the ratio of octane to heptane

• D) By the engine's compression ratio

What is detonation in an engine?

• A) Normal combustion process

• B) Abnormally rapid combustion of fuel

• C) The engine starting procedure

• D) Lubrication failure

Which of the following is a function of engine oil in sealing?

• A) It cools the engine

• B) It provides an air-tight barrier between piston rings and cylinder walls

• C) It reduces fuel consumption

• D) It cleans the engine

Which of the following is TRUE about the wet sump lubrication system?

• A) It uses an external oil tank.

• B) It stores oil in a sump under the crankcase.

• C) It allows for longer oil change intervals.

• D) It requires no oil filtration.

Using a fuel with a lower octane rating than recommended can lead to:

• A) Improved fuel efficiency

• B) Enhanced engine performance

• C) Detonation and engine damage

• D) Reduced engine weight