AIRFRAME ELECTRICAL SYSTEMS –
FINAL EXAM CORRECT 100%
1. (8805) Electric wire terminals for most aircraft applications must be what type?
A. Slotted.
B. Hook.
C. Ring. - ANSWER C
2. (8806) What is the principal advantage of the series-wound DC motor?
A. High starting torque.
B. Suitable for constant speed use.
C. Low starting torque. - ANSWER A
3. (8810) The starting current of a series-wound DC motor, in passing through both the
field and armature windings, produces a
A. low starting torque.
B. speed slightly higher when unloaded.
C. high starting torque. - ANSWER C
4. (8811) Which motor would be most likely to have an armature brake?
A. Starter motor.
B. Landing light retraction motor.
C. Inverter drive motor. - ANSWER B
5. (8817) How does the magnetic brake used to stop rotation of an electric motor
armature
operate?
A. Centrifugal force releases a rotating brake cog from a stationary notch when the
armature reaches a certain speed and magnetic force re-engages the cog when the
electrical power is turned off.
B. A friction brake is applied by a magnet and released by a spring.
C. A friction brake is applied by a spring and released by a magnet. - ANSWER C
6. (8819) A series-wound DC electric motor will normally require
A. more current at high RPM than at low RPM.
B. approximately the same current throughout its operating range of speed.
C. more current at low RPM than at high RPM. - ANSWER C
7. (8820) The type of electric wire terminals used for most aircraft applications, in
addition to providing good current carrying capabilities, are designed primarily
A. to prevent circuit failure due to terminal disconnection.
B. for uncomplicated and rapid circuit connection and disconnection.
C. for permanent connection to the circuit. - ANSWER A
, 8. (8821) Aluminum wire must be stripped very carefully because
A. high resistance will develop in stripping nicks.
B. stripping nicks can cause short circuits.
C. individual strands will break easily after being nicked. - ANSWER C
9 (8823) An ammeter in a battery charging system is for the purpose of indicating the
A. amperage available for use.
B. total amperes being used in the airplane.
C. rate of current used to charge the battery. - ANSWER C
10. (8826) What is the color and orientation of the position lights for navigation on
civil airplanes?
A. Left side, green; right side, red; rear aft, white.
B. Left side, red; right side, green; rear aft, white.
C. Left side, white; right side, green; rear aft, red. - ANSWER B
23. (8847) The most common method of attaching a pin or socket to an individual wire
in an
MS electrical connector is by
A. crimping.
B. soldering.
C. crimping and soldering. - ANSWER A
24. (8848) The pin section of an AN/MS connector is normally installed on
A. the power supply side of a circuit.
B. the ground side of a circuit.
C. either side of a circuit (makes no difference). - ANSWER B
25. (8850) If several long lengths of electrical cable are to be installed in rigid
conduit, the possibility of damage to the cable as it is pulled through the conduit
will be reduced by
A. dusting the cable with powdered graphite.
B. dusting the cable with powdered soapstone.
C. applying a light coat of dielectric grease. - ANSWER B
26. (8854) When adding a rheostat to a light circuit to control the light intensity, it
should be connected in
A. parallel with the light.
B. series with the light.
C. series parallel with the light switch. - ANSWER B
27. (8855) Circuits that must be operated only in an emergency or whose inadvertent
activation could endanger a system frequently employ
A. guarded switches.
B. push-pull-type circuit breakers only (no switches).
FINAL EXAM CORRECT 100%
1. (8805) Electric wire terminals for most aircraft applications must be what type?
A. Slotted.
B. Hook.
C. Ring. - ANSWER C
2. (8806) What is the principal advantage of the series-wound DC motor?
A. High starting torque.
B. Suitable for constant speed use.
C. Low starting torque. - ANSWER A
3. (8810) The starting current of a series-wound DC motor, in passing through both the
field and armature windings, produces a
A. low starting torque.
B. speed slightly higher when unloaded.
C. high starting torque. - ANSWER C
4. (8811) Which motor would be most likely to have an armature brake?
A. Starter motor.
B. Landing light retraction motor.
C. Inverter drive motor. - ANSWER B
5. (8817) How does the magnetic brake used to stop rotation of an electric motor
armature
operate?
A. Centrifugal force releases a rotating brake cog from a stationary notch when the
armature reaches a certain speed and magnetic force re-engages the cog when the
electrical power is turned off.
B. A friction brake is applied by a magnet and released by a spring.
C. A friction brake is applied by a spring and released by a magnet. - ANSWER C
6. (8819) A series-wound DC electric motor will normally require
A. more current at high RPM than at low RPM.
B. approximately the same current throughout its operating range of speed.
C. more current at low RPM than at high RPM. - ANSWER C
7. (8820) The type of electric wire terminals used for most aircraft applications, in
addition to providing good current carrying capabilities, are designed primarily
A. to prevent circuit failure due to terminal disconnection.
B. for uncomplicated and rapid circuit connection and disconnection.
C. for permanent connection to the circuit. - ANSWER A
, 8. (8821) Aluminum wire must be stripped very carefully because
A. high resistance will develop in stripping nicks.
B. stripping nicks can cause short circuits.
C. individual strands will break easily after being nicked. - ANSWER C
9 (8823) An ammeter in a battery charging system is for the purpose of indicating the
A. amperage available for use.
B. total amperes being used in the airplane.
C. rate of current used to charge the battery. - ANSWER C
10. (8826) What is the color and orientation of the position lights for navigation on
civil airplanes?
A. Left side, green; right side, red; rear aft, white.
B. Left side, red; right side, green; rear aft, white.
C. Left side, white; right side, green; rear aft, red. - ANSWER B
23. (8847) The most common method of attaching a pin or socket to an individual wire
in an
MS electrical connector is by
A. crimping.
B. soldering.
C. crimping and soldering. - ANSWER A
24. (8848) The pin section of an AN/MS connector is normally installed on
A. the power supply side of a circuit.
B. the ground side of a circuit.
C. either side of a circuit (makes no difference). - ANSWER B
25. (8850) If several long lengths of electrical cable are to be installed in rigid
conduit, the possibility of damage to the cable as it is pulled through the conduit
will be reduced by
A. dusting the cable with powdered graphite.
B. dusting the cable with powdered soapstone.
C. applying a light coat of dielectric grease. - ANSWER B
26. (8854) When adding a rheostat to a light circuit to control the light intensity, it
should be connected in
A. parallel with the light.
B. series with the light.
C. series parallel with the light switch. - ANSWER B
27. (8855) Circuits that must be operated only in an emergency or whose inadvertent
activation could endanger a system frequently employ
A. guarded switches.
B. push-pull-type circuit breakers only (no switches).
