The "G" switch which activates an ELT must do so when force is applied

parallel to the longitudinal axis of the aircraft

What is the ratio of primary to secondary winding turns in a transformer designed to triple its input?

The secondary with have 3 times as many turns as the primary

What type of antenna is this?

A VOR antenna for light aircraft

The minimum bend radius of coaxial cable should be:

10 times the diameter of the cable

In aircraft electrical systems, automatic reset circuit breakers

Should not be used in any circuits

A CSD unit drives an AC generator at a constant speed via

A variable hydraulic pump and a hydraulic motor

Reverse current relay contacts which fail to open after generator output has dropped below battery voltage will cause

current to flow in the opposite direction and try to motor the generator

What is the preferred location of the ELT?

As far aft as possible but forward of the empannage

When is a US resident NOT rquired to hold an FCC Radiotelephone Operator's Permit?

When flying and communicating within the USA

Doublers are used with antennas during installation in order to:

reinstate the structural strength of the aircraft skin

A Radar Altimeter determines altitude by

transmitting a signal and receiving a reflected signal back

The overvoltage control protects the generator system when excessive voltage is present by

opening the shunt field circuit

What type of antenna is this?

It's NOT an antenna, it's a fuel probe! (Dumb quiz author!)

An aircraft electrical control relay is

a remotely operated electromagnetic switch

What is the correct method for installing terminal lugs and splices to wire?

Use a certified crimping tool to secure the connector

Any generator in a 24 volt system showing low voltage probably means:

an out of adjustment voltage regulator

When checking an autopilot system on the ground, the autopilot should only be engaged:

once the amp warms up and the gyros are at speed

The nominal rating of electrical switches refers to continuous

current rating with the contacts closed

When installing an antenna on an aircraft, it should be attached

so that the loads imposed are transferred to the aircraft structure

What are the colors and locations of the Navigation Lights on aircraft?

Left: red, Right: green, Tail: white

DC Generators operated in parallel have equalizing circuits which

Increase the low output and decrease the high output generator both

Major adjustments to items such as Regulators, Contactors and Inverters are best done on the bench using procedures in

The Manufacturer's Maintenance Manuals

What is an important consideration when selecting a fuse or circuit breaker for a particular circuit?

The capacity of the fuse or CB meets the needs of the circuit

The mica between commutator segments must be undercut during generator overhaul by how much?

To the same depth as the width of the mica

When using the voltage drop method of checking circuit resistance,

the input voltage must remain constant

Which type of generator is NOT used on aircraft, and why?

Series wound, because voltage regulation sucks to the max!

What is the purpose of a Transponder?

Receive an interrogation signal from the ground and report to ATC

Which are the major parts of a DC Motor?

Armature ass'y, Field ass'y, Brush ass'y, End Frame

Static Dischargers help how?

They prevent radio interference by disssapating static at low current level

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Aircraft Electrical & Nav/Comm Systems Review

70 termsStudBud Administration1 play

Aircraft Electrical Systems and Navigation/Communication/Autopilot Systems review questions; prep for FAA Written Exam

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Questions 70

Answers

1
How long must the battery provide power for the locator beacon in the ELT?
24 hours
36 hours
72 hours
48 hours
2
What type of antenna is this?
A teardrop antenna used for entering holding patterns
A long range HF Communications antenna
A VOR antenna
An ADF Loop & Sense antenna
3
A gasket or sealant is used between an antenna and the skin of an aircraft:
on pressurized airframes only
to prevent abrasion of the skin by the antenna in flight
to prevent moisture intrusion
to compensate for the lack of good grounding capability
4
The "G" switch which activates an ELT must do so when force is applied
parallel to the vertical axis of the aircraft
perpendicular to the flight path
parallel to the longitudinal axis of the aircraft
parallel to the lateral axis of the aircraft
5
When installing an antenna on a vertical fin, what characteristics should be evaluated?
Stiffness and airworthiness
Flutter and vibration
Polarization and impedance
Capacitance and reluctance
6
A Current Limiter is basically a slow-blow fuse and is designed to be used in what?
High resistance circuits
Low voltage circuits
High current circuits
High voltage circuits
7
What is the ratio of primary to secondary winding turns in a transformer designed to triple its input?
The secondary with have 3 times as many turns as the primary
The secondary will have 6 times as many turns as the primary
The primary will have 3 times as many turns as the secondary
The primary will have 6 times as many turns as the secondary
8
The Navigation Lights on some aircraft are controlled by a single wire, on/off switch. This type of switch is called:
SPDT, two position switch
SPST, 2-position switch
VOR, multi-position switch
DPDT, 3-position switch
9
Which autopilot channel detects changes in aircraft pitch attitude?
Aileron
Yaw Damper
Elevator
Rudder
10
What should be used to protect wires where they pass through a bulkhead?
Teflon spiral wrap and tape
Electrical tape around the wires where they pass through the hole
Aerodynamic duct tape
A suitable grommet
11
What type of antenna is this?
An ADF Sense antenna for older light aircraft
A VOR antenna for light aircraft
An older style DME antenna for light aircraft
A Marker Beacon antenna for light aircraft
12
A fully integrated autopilot controls the aircraft around how many axes?
2
3
1
4
13
The minimum bend radius of coaxial cable should be:
20 times the diameter of the cable
10 times the diameter of the cable
15 times the diameter of the cable
5 times the diameter of the cable
14
The elevator channel of an autopilot controls the aircraft about (around) which axis?
The lateral axis
The longitudinal axis
The roll axis
The yaw axis
15
In aircraft electrical systems, automatic reset circuit breakers
Are useful only where temporary loads are encountered
Must be used in all essential circuits
Are a good idea as they save pilot workload in emergencies
Should not be used in any circuits
16
Which of the following is NOT one of the purposes of interpoles in a generator?
Reduce arcing at the brushes
Overcome armature reaction
Reduce field strength
Overcome armature dislexia
17
A CSD unit drives an AC generator at a constant speed via
A sychronous electric motor
Pure freaking magic (PFM)
A infinitely variable mechanical gearing system
A variable hydraulic pump and a hydraulic motor
18
An autopilot changes an attitude in order to correct an error, and controls are streamlined at the end, what happens?
Undershoot and correction
None of these answers are correct
Overshoot and correction
Normal operation
19
Reverse current relay contacts which fail to open after generator output has dropped below battery voltage will cause
major confusion in the cockpit
current to flow in the normal direction but at a higher voltage
current to flow back and forth depending upon battery voltage
current to flow in the opposite direction and try to motor the generator
20
What type of antenna is this?
A DME antenna
A Communications antenna for high speed aircraft
An ADF Sense antenna
A smaller VOR antenna for high speed aircraft
21
What kind of antenna is this?
An old style VOR antenna
An old style transponder antenna
A Boomerang antenna held up by Thing from the Addams Family
A Loop and Sense antenna
22
Reversing the wires to either the field or the voltage regulator will make a DC motor run in reverse.
False
True
23
What is the preferred location of the ELT?
As far aft as possible but forward of the empannage
At the lowest point of the fuselage
Somewhere in the mid-section of the fuselage
As far forward as possible but aft of the radome
24
What type of antenna is this?
A Canted antenna
A transponder antenna for light aircraft
A Marker Beacon Antenna
An ADF antenna
25
When is a US resident NOT rquired to hold an FCC Radiotelephone Operator's Permit?
When flying aircraft in EEU countries
When flying aircraft certified for VFR flights only
When flying and communicating within the USA
When flying and communicating outside the USA
26
Doublers are used with antennas during installation in order to:
to increase the validity of the grounding path
reinstate the structural strength of the aircraft skin
eliminate antenna vibration
prevent oil canning of the skin
27
A Radar Altimeter determines altitude by
receiving data transmitted by the ILS System
receiving signals from ground stations
transmitting a signal and receiving a reflected signal back
interpreting data collected by the transponder
28
The overvoltage control protects the generator system when excessive voltage is present by
opening the shunt field circuit
interrupting the feedback circuit for the captain's visit to the fwd galley
breaking a circuit feeding the coil of a field control circuit breaker
opening and resetting the field control relay
29
What type of antenna is this?
An air cooled Emergency Communications antenna
A Transponder antenna without the protective shell
A fluid immersible VOR antenna
It's NOT an antenna, it's a fuel probe! (Dumb quiz author!)
30
An aircraft electrical control relay is
a remotely operated electromagnetic switch
an electromagnetic reversing mechanism
a device which converts kinetic energy to electrical energy
any conductor which takes electricity and passes it on with no resistance
31
An ammeter is in a generator lead; the regulator does not limit the maximum current; where can the ammeter be redlined?
(90%
75%
50%
100%
32
What is the correct method for installing terminal lugs and splices to wire?
Solder the terminal or the connector pin/socket to the wire
Crimp using the inside flat surfaces between the handles of any pliers
Use a certified crimping tool to secure the connector
Solder the exposed wire prior to crimping with a tool
33
Any generator in a 24 volt system showing low voltage probably means:
shorted or grounded wiring
a bad reverse current cutout relay
an out of adjustment voltage regulator
a bad generator
34
Static Inverters are electronic devices that change DC to AC with
the exclusive properties of an OR gate
the exclusive properties of a NAND gate
with the use of an oscillator
with the use of a dynamotor with half wave rectification
35
When checking an autopilot system on the ground, the autopilot should only be engaged:
whenever the technician so desires
once the amp warms up and the gyros are at speed
Never! The autopilot should not be engaged on the ground
at any time after aircraft power is applied to the system
36
The nominal rating of electrical switches refers to continuous
voltage rating with the contacts closed
current rating with the contacts closed
voltage rating with the contacts open
current rating with the contacts open
37
What in the Wide World of Sports is this thing?
A Weather Radar antenna
A lightning detector antenna
A Wide Area Augmentation System transmitter
A hot plate from the local Chi Chi's restaurant
38
When installing an antenna on an aircraft, it should be attached
with a reinforcing doubler on each side of the aircraft skin
so that the loads imposed are transferred to the aircraft structure
to the primary structure at the intersection of all 3 axes
with only a single doubler to prevent oil canning of the skin
39
What are the colors and locations of the Navigation Lights on aircraft?
Left: pink, Right: pale blue, Tail: yellow
Left: white, Right: red, Tail: green
Colored lights are only used on ships.
Left: red, Right: green, Tail: white
40
DC Generators operated in parallel have equalizing circuits which
Wait for the system to become unstable before doing anything
Increase the low output and decrease the high output generator both
Decrease the high output generator
Increase the low output gnerator
41
Installed radio equipment is protected from damage due to jolts and vibration by what?
Springs and/or viscous damper mounted racks
shock mounts
Foam cushioning between equipment chassis and case
Rubber or foam mounts
42
Major adjustments to items such as Regulators, Contactors and Inverters are best done on the bench using procedures in
the FAA Advisory Circular 4313.1A
The Manufacturer's Maintenance Manuals
Aircraft Technical Orders
The "Aircraft Parts Repair for Total Idiots" book
43
What is an important consideration when selecting a fuse or circuit breaker for a particular circuit?
The capacity of the fuse or CB meets the needs of the circuit
The current exceeds a predetermined value based on the voltage level
The voltage rating should be lower than the maximum circuit voltage
Current carrying capacity and allowable voltage drop
44
The mica between commutator segments must be undercut during generator overhaul by how much?
To the same depth as the width of the mica
To the same depth as the co-pilot can think clearly
To the same depth as half the width of the mica
To the same depth as twice the width of the mica
45
When using the voltage drop method of checking circuit resistance,
the output voltage must remain constant
the input voltage must be varied with any load applied
the input voltage must remain constant
the output voltage must be varied to compensate for loads
46
Which type of generator is NOT used on aircraft, and why?
Really wound, because these generators easliy get over-excited.
Shunt wound because nobody remembers shunt=parallel
Compound wound simply due to expense.
Series wound, because voltage regulation sucks to the max!
47
A connector which may be exposed to moisture should be:
coated with zinc chromate
coated with a water repellent grease
sprayed with varnish
A special moisture proof type
48
What is the purpose of a Transponder?
Continually transmit flight data to ATC
Receive an interrogation signal from the ground and report to ATC
Monitor all flight parameters for ATC
Monitor all flight parameters for the autopilot system
49
Iron cores of induction coils are laminated to increase core permeability.
False
True
50
Which are the major parts of a DC Motor?
Armature ass'y, Field ass'y, Brush ass'y, End Frame
Rheostat, End Frame, Armature ass'y, Pole piece
End Frame, Field ass'y, Pole piece, Brush ass'y
Commutator, Armature ass'y Field ass'y, End Frame
51
Static Dischargers help how?
They dissapate static electricity at high current levels
They help prevent radio interference by dissapating static via high voltage
They dissapate static electricity at low voltage levels
They prevent radio interference by disssapating static at low current level
52
A series DC generator field coil should:
Be connected to battery voltage before being checked with an ohmeter
Be removed from the generator housing before being checked with an ohmeter
Show high resistance when checked with an ohmeter
Show low resistance when checked with an ohmeter
53
Part of the ADF System uses what?
A DME antenna
A Marker Beacon antenna
A VOR antenna
A Sense and Loop antenna
54
A DME antenna should be installed so it...
is aligned with the transponder antenna
is aligned with the aircraft chord line but to one side of it
is aligned with the glideslope antenna
is aligned with the centerline of the aircraft
55
One of the advantages of using AC power in aircraft is:
AC motors can be reversed but DC motors cannot
There really is no particular advantage; AC generators are just cheaper
Effective voltage is 1.41 times max instantaneous, so less power is used
The greater ease in stepping the voltage up or down
56
What might this antenna be if it was not a DME antenna?
A Transponder antenna
A Transceiver antenna
A Transvestite antenna
A Transformer antenna
57
Tuning a Comm Receiver to the emergency frequency and activating the ELT within 5 minutes past the hour is a valid test.
False
True
58
What does a Rectifier do?
Uses oscillators to create Alternating Current
Changes DC to AC
Changes AC to DC
Fixes difficulties between two arguing parties
59
What component is the sensing device of an electromechanical autopilot?
Servo
Controller
Computer
Gyro
60
The positive field lead breaks between a generator and its GCU and shorts out while the engine runs. The output will be:
Normal voltage
Residual voltage
Zero volts
Very high voltage
61
What type of antenna is this?
A DME antenna for high speed aircraft
A VOR antenna for high speed aircraft
A Communications antenna for high speed aircraft
An ADF antenna for high speed aircraft
62
The "throw" of a switch (as in: single pole double throw) indicates what?
The number of times a switch must be moved to open a circuit
The terminals by which current can enter or leave the switch
The circuits each pole can complete through the switch
Places at which the the switch will come to rest and open/close a circuit
63
If an IDG scavange oil filter is contaminated with metal bits, you should:
do an oil analysis to diagnose the problem
replace the oil and filter and monitor the filter every 25 flight hours
spread the bits on a paper towel and see if any have legible part numbers
remove and replace the IDG
64
In modern large aircraft, what device usually monitors flight parameters and performs autopilot functions?
The Transponder
The Display Controller
The Performance Computer
Flight Management Computer
65
Connectors used in aircraft should meet what specifications?
Technical Service Order (TSO)
Military Specification (MS)
Parts Manufacturer Approval (PMA)
Society of Electrical Specifications (SES)
66
What is the minimum bend raduis for a wire bundle?
10 times the diameter of the bundle
15 times the diameter of the bundle
5 times the diameter of the bundle
20 times the diameter of the bundle
67
What is the preferred location for the VOR antenna on light aircraft?
On top of the cabin with the apex of the "V" pointing forward
On the bottom of the cabin with the apex of the "V" pointing forward
On the bottom of the fuselage as far aft as possible
On the top of the fuselage as far aft as possible
68
The maximum time a circuit can operate and still be considered an intermittent duty circuit is what?
3 minutes
1 minute
2 minutes
4 minutes
69
One antenna can be used in light aircraft for the radio range and broadcast bands because the
pilots are clever and can manipulate the frequencies
antenna is omni-directional
antenna length can be electronically adjusted
two ranges are close enough together
70
Flashing the Field is the method used to restore generator field residual magnetism.
True
False

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