Chapter 3 Engines Flashcards
As a non-turbocharged airplane climbs, you’ll notice the manifold pressure gauge shows ___ even though the throttle is fulled opened
a decrease
Most engine manufacturers recommend leaning the mixture whenever you’re operating at or below ___ of the engine’s maximum power output.
75%
A mixture that is too rich causes engine ___
roughness
Under normal conditions ( assuming a non-turbocharged engine), the engine’s manifold pressure can’t rise above ___ pressure
atmospheric
High cylinder head temperatures also lead to something known as …
Detonation
The biggest danger with an excessively lean mixture is that it ___
burns hot
What type fuel can be substituted for an aircraft if the recommended octane is not available?
The next higher octane aviation gas
The ___ jet is that portion of the carburetor that allows the engine to run when the throttle is pulled full aft.
Idling
With an increase in altitude the air becomes t hinder and doesn’t ___ as much for a given volume.
Weigh
with an increase in altitude the air becomes thinner and doesn’t ___ as much for a given volume
Weigh
On an airplane with a constant speed propeller, the ___ tells you how fast the propeller spins (its RPM), and the manifold pressure gauge gives you an approximate measure of engine ___
tachometer, power
Be aware that the propeller governor starts working only when the engine is operating above a specific ___ and not below
RPM
When is it possible to have an air filter freeze over while nowhere near a cloud?
If the air is moist and temps are low, water can accumulate and the air filter’s membrane can freeze.
Most engine manufacturers recommend leaning the mixture whenever you’re operating at or below ___ of the engine’s maximum power output (check your POH to be sure)
75%
Which condition is most favorable for the development of carb icing?
Temps between 20 degrees F and 70 degrees F and High humidity
Why have a propeller that can change its pitch in flight in the first place?
Airplanes with controllable pitch propellers can select the optimum angle of attack for climb and cruise.
Is it permissible to operate the engine on one magneto?
yes. If one magneto goes bad, it’s permissible to switch to a single magneto
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as …
preignition
As you move up into higher performance airplanes you encounter constant speed (controllable pitch) propellers. Airplanes with these propellers usually have both a ___ and a/an ___ control, so you manage engine power and propeller RPM separately.
throttle, propeller
What’s particularly interesting about magnetos is that they are self-contained spark generators and require no outside source of electrical energy to work other than the ___ motion of the airplane engine.
Turning
Your carburetor is a fine ice maker. Because of the considerable drop in temp caused by the atomization and evaporation of fuel, any ___ present can and will freeze.
Moisture
In an airplane with a fixed pitch prop, one lever, the ___ controls both power and propeller blade RPM.
Throttle
You can’t get carb ice in a fuel injection system for one very important reason: there is ___
no carburetor associated with this system
Controllable pitch propellers on GA airplanes are of the constant speed variety. Once the RPM is established, changes in manifold pressure (by moving the throttle) ___ affect engine speed.
won’t