SPC Aircraft Systems and Performance 2

Question 1

What is the purpose of the aircraft's primer system?

Accepted Answer

To inject fuel directly into the cylinders for easier cold-weather starting

Answer

To pressurize the fuel tanks before engine start

Answer

To lubricate the engine cylinders before startup

Answer

To pre-heat the carburetor to prevent icing

Question 2

At what altitude does a normally aspirated engine lose approximately 3% of its power for every 1,000 feet gained?

Accepted Answer

From sea level upward

Answer

Above 5,000 feet MSL only

Answer

Only above the critical altitude

Answer

Above 10,000 feet MSL only

Question 3

What does the VSO airspeed indicate on the airspeed indicator?

Accepted Answer

Stalling speed in the landing configuration

Answer

Maximum structural cruising speed

Answer

Stalling speed in the clean configuration

Answer

Never-exceed speed

Question 4

Which fuel system component prevents vapor lock by maintaining positive fuel pressure to the carburetor?

Accepted Answer

Electric boost pump

Answer

Primer

Answer

Fuel strainer

Answer

Mixture control

Question 5

What happens to density altitude on a hot, humid day at a given field elevation?

Accepted Answer

Density altitude increases above field elevation

Answer

Density altitude equals field elevation regardless of conditions

Answer

Density altitude decreases below field elevation

Answer

Humidity has no effect on density altitude

Question 6

What is the function of the aircraft's magneto?

Accepted Answer

To generate high-voltage electrical sparks to ignite the fuel-air mixture

Answer

To charge the aircraft battery during cruise flight

Answer

To power the aircraft's avionics systems

Answer

To regulate voltage to the instrument panel

Question 7

What is the effect of lowering flaps on an aircraft's stall speed?

Accepted Answer

Stall speed decreases because flaps increase lift at lower airspeeds

Answer

Stall speed increases because flaps add drag

Answer

Stall speed remains unchanged regardless of flap position

Answer

Stall speed increases because the wing area is enlarged