Piston quiz 3

When is straight mineral oil used in a piston engine ?

• During hot weather operations

• During the “ break in “period of a new or newly overhauled engine

• During cold weather operations

• When sludge has been found in the oil

When a cylinder has been chrome plated, how is it identified?

• It is marked with a red square on the head

• It is marked with an orange band painted around the cylinder base.

• Stamped in the part number

• All cylinders are chrome plated, no identification is required.

What system supplies fuel during rapid throttle movement

• Accelerator pump

• Engine driven fuel pump

• Electric boost pump

• Float valve

When air passes through the Venturi,what three changes occur

• Pressure increases, temperature increases, velocity increases

• Pressure decreases, velocity increases, temperature decreases

• Pressure decreases, velocity increases, temperature remains unchanged.

• Pressure decreases, velocity remains unchanged, temperature increases

Where is the butterfly valve located ina float type carburetor?

• After the main discharge nozzle and the Venturi

• After the Venturi and before the main discharge nozzle

• A float type carburetor dose not have a butterfly valve

• Near the carburetor intake.

Plain bearings are lubricated by

• Splash

• Spray

• Pressure

• Dip

At higher altitude and lower barometric pressure,

• Mixture must be leaned

• Mixture must be enriched

• Carb ice is more likely

• Ignition must be advanced

When the air is moist and the temperature around the freezing point of water

• Detonation is more likely

• Carb icing is possible

• Increased fuel consumption is likely

• Engine stalling is possible

What colour is100LL fuel

• Green

• Red

• Straw

• Blue

What device, on an aircraft piston engine, issued to assist starting in cold weather

• The spark advance

• The primer

• The air starter

• Using “ both mags”