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Engines Unit Exam - FAA Questions

Quiz by Christian Gibson

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28 questions
Show answers
  • Q1
    The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting
    a decrease in RPM and then a gradual increase in RPM.
    an increase in RPM and then a gradual decrease in RPM.
    a decrease in RPM and then a constant RPM indication.
    30s
  • Q2
    What action can a pilot take to aid in cooling an engine that is overheating during a climb?
    Increase climb speed and increase RPM.
    Reduce rate of climb and increase airspeed.
    Reduce climb speed and increase RPM.
    30s
  • Q3
    What is an advantage of a constant-speed propeller?
    Provides a smoother operation with stable RPM and eliminates vibrations.
    Permits the pilot to select the blade angle for the most efficient performance.
    Permits the pilot to select and maintain a desired cruising speed.
    30s
  • Q4
    Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges?
    Using fuel that has a lower-than-specified fuel rating.
    Operating with higher-than-normal oil pressure.
    Using fuel that has a higher-than-specified fuel rating.
    30s
  • Q5
    On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used?
    All the time to aid the engine-driven fuel pump.
    Constantly except in starting the engine.
    In the event engine-driven fuel pump fails.
    30s
  • Q6
    The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
    detonation.
    combustion.
    pre-ignition.
    30s
  • Q7
    A constant-speed propeller is more efficient than other propellers because:
    An airplane so equipped will produce a faster speed at cruise altitude.
    It allows selection of the most efficient engine rpm for the given conditions.
    It has the pitch of the propeller blades in a fixed position.
    30s
  • Q8
    If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause
    a mixture of fuel and air that is not uniform in all cylinders.
    detonation.
    lower cylinder head temperatures.
    30s
  • Q9
    Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will
    prevent moisture condensation by eliminating airspace in the tanks.
    prevent expansion of the fuel by eliminating airspace in the tanks.
    force any existing water to the top of the tank away from the fuel lines to the engine.
    30s
  • Q10
    For a given power setting with a constant-speed, variable pitch propeller:
    High pitch results in high RPM.
    Low pitch results in high RPM.
    Low pitch results in low RPM.
    30s
  • Q11
    A too rich mixture:
    Will cause the engine to overheat.
    Will create spark plug fouling.
    Will cause the engine to run more smoothly.
    30s
  • Q12
    While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 feet MSL is made without readjusting the mixture?
    There will be more fuel in the cylinders than is needed for normal combustion, and the excess fuel will absorb heat and cool the engine.
    The excessively rich mixture will create higher cylinder head temperatures and may cause detonation.
    The fuel/air mixture may become excessively lean.
    30s
  • Q13
    If an aircraft is equipped with a fixed-pitch propeller and a float-type carburetor, the first indication of carburetor ice would most likely be
    loss of RPM.
    engine roughness.
    a drop in oil temperature and cylinder head temperature.
    30s
  • Q14
    What is the purpose of the airplane engine’s mixture control?
    To speed up or slow down the airplane much like the gas pedal on your car.
    It allows the oil to flow more quickly into the engine’s crankcase.
    To regulate the ratio of gasoline to air entering the fuel distribution system.
    30s
  • Q15
    With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be
    equally susceptible to icing.
    susceptible to icing only when visible moisture is present.
    more susceptible to icing.
    30s

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