SAFA Sample Exam 817 -General Knowledge

Which stroke of a 4-stroke piston engine cycle begins as the piston first starts its downward travel in the cycle?

• Compression

• Intake

• Exhaust

• Power

What is indicated by a cloudy or hazy fuel sample of AVGAS?

• Nothing. As long as the proper colour for the grade of fuel appears, and as long as the fuel sample does not show a distinct layer of water at the bottom of the fuel sample, it will be perfectly safe to use.

• This can be an indicator of free or dispersed water in the fuel sample.

• Choice b) or finely divided dirt particles.

• In this case you should also check the smell: as long as the sample smells like typical AVGAS, then the fuel will be perfectly safe to use.

For an aircraft fitted with a carburettor, if no changes are made to the mixture setting as you climb, the mixture becomes ____, and as you descend, if no changes are made to the mixture setting, the mixture becomes ____.

• leaner, leaner.

• richer, richer.

• richer, leaner.

• leaner, richer.

A supercharger is installed

• upstream from the carburettor and compresses the fuel air mixture.

• downstream from the carburettor and compresses the fuel air mixture.

• upstream from the carburettor and compresses the intake air.

• downstream from the intake manifold and compresses the intake air.

The effect of extending flaps is to

• decrease the lift and increase the drag.

• increase the lift and increase the drag.

• decrease the lift and decrease the drag.

• increase the lift and decrease the drag.

Due to reduced air density at higher altitudes, for a given angle of attack, to maintain the same lift, an aircraft must fly

• at a higher indicated airspeed.

• at a higher true airspeed.

• with the mixture properly leaned.

• with cowl flaps retracted.

Where the aircraft is banked 75°, how much lift must be provided as compared to level flight?

• The same amount.

• Double the amount.

• Three times the amount.

• Four times the amount.

Aileron drag is minimized by the use of

• differential ailerons.

• Frise-type ailerons.

• differential ailerons or Frise-type ailerons.

• Aileron trim tabs.

The smallest pointer on a 3-pointer pressure sensitive altimeter indicates

• tens of feet.

• hundreds of feet.

• thousands of feet.

• tens of thousands of feet.

You commence a turn from 090° M to 120° M. Then you commence a turn from 120° M to 150° M. The magnetic compass will display

• lead error on the turn from 090° M to 120° M, with greater lead error on the turn from 120° M to 150° M.

• lead error on the turn from 090° M to 120° M, with lesser lead error on the turn from 120° M to 150° M.

• lag error on the turn from 090° M to 120° M, with greater lag error on the turn from 120° M to 150° M.

• lag error on the turn from 090° M to 120° M, with lesser lag error on the turn from 120° M to 150° M.