WorksheetsAircraft Systems
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
Excessively high engine temperatures will
a)
cause damage to heat-conducting hoses and warping of the cylinder cooling fins
b)
cause loss of power, excessive oil consumption, and possible permanent internal engine damage
c)
not appreciably affect an aircraft engine
2.
If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with
a)
the mixture set too rich
b)
higher-than-normal oil pressure
c)
too much power and with the mixture set too lean
3.
One purpose of the dual-ignition system on an aircraft engine is to provide for
a)
improved engine performance
b)
uniform heat distibution
c)
balanced cylinder head pressure
4.
Float-type carburetors operate based on
a)
automatic metering of air at the venuri as the aircraft gains altitude
b)
the difference is air pressure at the venturi throat and the air inlet
c)
increase in air velocity in the throat of a venturi causing an increase in air pressure
5.
The basic purpose of adjusting the fuel/air mixture at altitude is to
a)
decrease the amount of fuel in the mixture in order to compensate for increased air density
b)
decrease the fuel flow in order to compensate for decreased air density
c)
increase the amount of fuel in the mixture to compensate for the decrease in pressure and density of the air
6.
During the runup at a high elevation airport, you notice 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?
a)
Check the results obtained with a leaner setting of the mixture
b)
Taxi back to the flight line for a maintenance check
c)
Reduce manifold pressure to control detonation
7.
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?
a)
The fuel/air mixture can become excessively lean
b)
There can be more fuel in the cylinders than is needed for normal combustion, and the excess fuel will absorb heat and cool the engine
c)
The excessively rich mixture creates higher cylinder head temperature and can cause detonation
8.
Which condition is most favorable to the development of carburetor icing?
a)
Any temperature below freezing and a relative humidity of less than 50 percent
b)
Temperature between 32 degrees F and 50 degrees F and low humidity
c)
Temperature between 20 degrees F and 70 degrees F and high humidity
9.
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
a)
a drop in oil temperature and cylinder head temperature
b)
engine roughness
c)
loss of RPM
10.
Generally speaking, the use of carburetor heat tends to
a)
decrease engine performance
b)
increase engine performance
c)
have no effect on engine performance
11.
The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting
a)
an increase in RPM and then a gradual decrease in RPM
b)
a decrease in RPM and then a constant RPM indication
c)
a decrease in RPM and then a gradual increase in RPM
12.
With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be
a)
more susceptible to icing
b)
equally susceptible to icing
c)
less susceptible to icing
13.
If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause
a)
detonation
b)
a mixture of fuel and air that is not uniform in all cylinders
c)
lower cylinder head temperatures
14.
Detonation occurs in a reciprocating aircraft engine when
a)
the spark plugs are fouled or shorted out or the wiring is defective
b)
hot spots in the combustion chamber ignite the fuel/air mixture in advance of normal ignition
c)
the unburned charge in the cylinders explodes instead of burning normally
15.
Detonation may occur at high-power settings as
a)
the fuel mixture ignites instantaneously instead of burning progressively and evenly
b)
an excessively rich fuel mixture causes an explosive gain in power
c)
the fuel mixture is ignited too early by hot carbon deposits in the cylinder
16.
You suspect that your engine (with a fixed-pitch propeller) is detonating during climbout after takeoff. Your initial corrective action would be to
a)
lean the mixture
b)
lower the nose slightly to increase airspeed
c)
apply carburetor heat
17.
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
a)
combustion
b)
preignition
c)
detonation
18.
Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges?
a)
Using fuel that has a lower-than-specified fuel rating
b)
Using a fuel that has a higher-than-specified fuel rating
c)
Operating with higher-than-normal oil pressure
19.
What type fuel can be substituted for an aircraft if the recommend octane is not available?
a)
The next higher octane aviation gas
b)
The next lower octane aviation gas
c)
Unleaded automotive gas of the same octane rating
20.
Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will
a)
force any existing water to the top of the tank away from the fuel lines to the engine
b)
prevent expansion of the fuel by eliminating airspace in the tanks
c)
prevent moisture condensation by eliminating airspace in the tanks
21.
For internal cooling, reciprocating aircraft engines are especially dependent on
a)
a properly functioning thermostat
b)
air flowing over the exhaust manifold
c)
the circulation of lubricating oil
22.
An abnormally high engine oil temperature indication may be caused by
a)
the oil level being too low
b)
operating with a too high viscosity oil
c)
operating with an excessively rich mixture
23.
What action can a pilot take to aid in cooling an engine that is overheating during a climb?
a)
Reduce rate of clime and increase airspeed
b)
Reduce climb speed and increase RPM
c)
Increase climb speed and increase RPM
24.
What is one procedure to aid in cooling an engine that is overheating?
a)
Enrichen the fuel mixture
b)
Increase the RPM
c)
Reduce the airspeed
25.
How is engine operation controlled on an engine equipped with a constant-speed propeller?
a)
The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM
b)
The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates a constant blade angle
c)
The throttle controls engine RPM as registered on the tachometer and the mixture control regulates the power output
26.
What is an advantage of a constant-speed propeller?
a)
Permits the pilot to select and maintain a desire cruising speed
b)
Permits the pilot to select the blade angle for the most efficient performance
c)
Provides a smoother operation with stable RPM and eliminates vibrations
27.
A precaution for the operation of an engine equipped with a constant-speed propeller is to
a)
avoid high RPM settings with high manifold pressure
b)
avoid high manifold pressure settings with low RPM
c)
always use a rich mixture with high RPM settings
28.
Which preflight checks should you make on an airplane with full-authority digital engine control (FADEC)?
a)
Verify proper operation of both ECUs as well as their back-up power sources
b)
Ensure that engine RPM drops sufficiently when the propeller control is pulled back
c)
Ensure that the mixture control is adjusted for highest RPM with smooth engine operation
29.
What should be the first action after starting an aircraft engine?
a)
Adjust for proper RPM and check for desired indications on the engine gauges
b)
Place the magneto or ignition switch momentarily in the OFF position to check for proper grounding
c)
Test each brake and the parking brake
30.
If it becomes necessary to hand-prop an airplane engine, it is extremely important that a competent pilot
a)
call "contact" before touching the propeller
b)
be at the controls in the cockpit
c)
be in the cockpit and call out all commands
31.
To properly purge water from the fuel system of an aircraft equipped with fuel tank sumps and a fuel strainer quick drain, it is necessary to drain fuel from the
a)
fuel strainer drain
b)
lowest point in the fuel system
c)
fuel strainer drain and the fuel tank sumps
32.
Which part of the 4-stroke engine cycle is fuel/air mixture ignited?
a)
Power
b)
Compression
c)
Exhaust
d)
Intake
33.
Which part of the 4-stroke engine cycle is the fuel/air mixture drawn into the cylinders?
a)
Power
b)
Compression
c)
Exhaust
d)
Intake
34.
Which part of the 4-stroke cycle is the fuel/air mixture squeezed prior to ignition?
a)
Exhaust
b)
Intake
c)
Power
d)
Compression
35.
Which item listed is NOT part of the induction system?
a)
Air Filter
b)
Carburator
c)
Fuel Injector
d)
Magneto
36.
This allows the pilot to control how much fuel is combined with air to get a ratio that is combustible
a)
Throttle
b)
Mixture
c)
Carb Heat
d)
Propeller Control
37.
The blue lever is typically controls
a)
Throttle
b)
Mixture
c)
Carb Heat
d)
Propeller Control
38.
This creates the electrical power that is required by the spark plugs
a)
Battery
b)
Alternator
c)
Magnetos
d)
Ignition
39.
This allows reciprocating aircraft to produce maximum power at high altitudes
a)
Fuel Injection System
b)
Float Carburator
c)
Supercharger
d)
Alternate or Static Air
40.
Which of these use gasses from the exhaust manifold to drive the compressor?
a)
Fuel Injection System
b)
Supercharger
c)
Turbocharger
d)
Alternate or Static Air
41.
How do you control the speed of a fixed pitched propeller?
a)
Adjust the throttle
b)
Adjust the mixture
c)
Adjust the manifold pressure
d)
Adjust the propeller control pitch setting
42.
What gauge should you check first right after engine start
a)
Oil temperature
b)
Oil pressure
c)
Ammeter
d)
Manifold pressure
43.
If your alternator & electrical system are working correctly, you'll be able to tell on the...
a)
Oil temp gauge
b)
Breaker panel
c)
Ammeter
d)
Manifold pressure gauge
44.
In the diagram provided, number 7 represents the
a)
Voltage Regulator
b)
Master Switch
c)
Alternator
d)
Battery
e)
Main Bus
45.
In the diagram provided, number 1 represents the
a)
Battery
b)
Master Switch
c)
Alternator
d)
Main Bus
e)
Starter
46.
In the diagram provided, number 8 represents the
a)
Alternator
b)
Master Switch
c)
Battery
d)
Main Bus
e)
Starter
47.
In the diagram provided, number 2 represents the
a)
Master Switch
b)
Alternator
c)
Battery
d)
Main Bus
e)
Starter
48.
In the diagram provided, number 9 represents the
a)
Starter
b)
Master Switch
c)
Alternator
d)
Battery
e)
Main Bus
49.
In the diagram provided, number 6 represents the
a)
Main Bus
b)
Master Switch
c)
Alternator
d)
Battery
e)
Starter
50.
In the diagram provided, number 10 represents the
a)
Ignition
b)
Master Switch
c)
Alternator
d)
Battery
e)
Main Bus
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