Powerplant Quiz PPL

Where may an aircraft's operating limitations be found?

On the Airworthiness Certificate.

In the current, FAA-approved flight manual, approved manual material, markings, and placards, or any combination thereof.

In the aircraft airframe and engine logbooks.

The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as

combustion.

pre-ignition.

detonation.

What is one procedure to aid in cooling an engine that is overheating?

Enrichen the fuel mixture.

Increase the RPM.

Reduce the airspeed.

During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action?

Check the results obtained with a leaner setting of the mixture.

Taxi back to the flight line for a maintenance check.

Reduce manifold pressure to control detonation.

What action can a pilot take to aid in cooling an engine that is overheating during a climb?

Reduce rate of climb and increase airspeed.

Reduce climb speed and increase RPM.

Increase climb speed and increase RPM.

If a pilot suspects that the engine (with a fixed-pitch propeller) is detonating during climb-out after takeoff, the initial corrective action to take would be to

lean the mixture.

lower the nose slightly to increase airspeed.

apply carburetor heat.

Detonation may occur at high-power settings when

The fuel mixture ignites instantaneously instead of burning progressively and evenly.

an excessively rich fuel mixture causes an explosive gain in power.

the fuel mixture is ignited too early by hot carbon deposits in the cylinder.

What should be the first action after starting an aircraft engine?

Adjust for proper RPM and check for desired indications on the engine gauges.

Place the magneto or ignition switch momentarily in the OFF position to check for proper grounding.

Test each brake and the parking brake.

One purpose of the dual ignition system on an aircraft engine is to provide for

improved engine performance.

uniform heat distribution.

balanced cylinder head pressure.

If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine

will run very rough.

cannot be started with the switch in the ON position.

cannot be shut down by turning the switch to the OFF position.

If the ground wire between the magneto and the ignition switch becomes disconnected, the engine

will not operate on one magneto.

cannot be started with the switch in the on position.

could accidentally start if the propeller is moved with fuel in the cylinder.