At3 Ch5B

Front 1

TACAN operates in bands, modes, and conditions in the A/A. Which of the
following is a list of TACAN
operating bands, modes, and
conditions for using the A/A
function?
i. VHF, X-pulse mode, and 67
channel separation
2. UHF, X or Y pulse modes, and 63 channel separation
3. UHF, Y-pulse mode, and channel 4
on both aircraft

Back 1

UHF, X or Y pulse modes, and 63 channel separation

Front 2

What navigation system uses sky waves and overcomes the loss in position accuracy?
1. TACAN
2. Loran
3. Omega
4. Doppler

Back 2

Omega

Front 3

What component of a navigational computer system uses loran, TACAN,
and Doppler as possible inputs?
1. Data-gathering units
2. Computer units
3. Navigational panels
4. Navigational indicators

Back 3

Data-gathering units

Front 4

What component of a navigational computer system lets the navigator
switch from one mode of operation to another?
1. Navigation panels
2. Computer units
3. Data gathering units
4. Repeater display units

Back 4

Navigation panels

Front 5

To which of the following NEETS modules should you refer for information on radio-frequency
communications principles?
1. 1
2. 9
3. 17
4. 22

Back 5

17

Front 6

What modulation system includes FSK and PM?
1. Amplitude modulation
2. Frequency modulation
3. Continuous-wave modulation
4. Angle modulation

Back 6

Angle modulation

Front 7

What type of system operates between 225.0 MHz and 399.9 MHz?
1. HF
2. UHF FM
3. UHF RM
4. VHF

Back 7

UHF

Front 8

Of the following antennas, which one produces high gain and has excellent
directivity?
1. Parabolic
2. Helical
3. Flat-spiral
4. Log periodic

Back 8

Parabolic

Front 9

1. Designed to jam communications, navigation, and radar receivers
2. Transmits high power noise over a given band of frequencies
3. An ECM jammer can protect a group of aircraft over a large area
4. All of the above

Back 9

All of the above

Front 10

Which of the following is the
definition of the term ballistics?
1. The science of the motion of a weapon system
2. The study of all the various forces that govern the movement of projectiles
3. The curve a projectile describes as it travels to the target
4. The science of trajectories

Back 10

The study of all the various forces that govern the movement of projectiles

Front 11

You can detect an object Under the water from the air. Which of the
following is the reason for your ability to do this?
1. Any magnetic property that
distorts the earth’s magnetic
field
2. Compensation of magnetic noise
3. Radar theory
4. Disturbance in the wave motion

Back 11

Any magnetic property that
distorts the earth’s magnetic
field

Front 12

Into which of the following groups can sonobuoys be categorized?
1. Passive
2. Active
3. Special purpose
4. All of the above

Back 12

All of the above

Front 13

The operation of which of the
following sonobuoys allows it to operate silently until it is commanded to radiate sound?
1. RO
2. CASS
3. BT
4. SAR

Back 13

CASS

Front 14

Which of the following modes of operation are associated with the DIFAR system?
1. Range
2. Omnisearch
3. ALI-LOFAR
4. All of the above

Back 14

Range

Front 15

What is the basic power source of an electrical system in an aircraft?
1. Generator
2. Ram-air turbine
3. Rectifier
4. Engine

Back 15

Engine

Front 16

What device is inserted between the engine and the ac generator to provide a constant speed to the
generator?
1. CSD unit
2. Governor
3. Rectifier
4. Dynamotor

Back 16

CSD unit

Front 17

In most modern aircraft, what type of power is produced by the main
electrical power generation system?
1. Three-phase ac power at 60 Hz
2. Three-phase ac power at 400 Hz
3. DC power only
4. DC and ac power

Back 17

Three-phase ac power at 400 Hz

Front 18

Which of the following publications contains a discussion of transformer rectifier units for each applicable aircraft?
1. MIM
2. NAMP
3. MTIP
4. TRAMAN

Back 18

MIM

Front 19

Which of the following devices is used to convert low-voltage dc to ac?
1. Frequency-change
2. Rectifier
3. Amplifier
4. Inverter

Back 19

Inverter

Front 20

Which of the following devices protects the aircraft’s electrical
system from damage and failure?
1. Fuse
2. Current limiter
3. Circuit breaker
4. Each of the above

Back 20

Each of the above

Front 21

What device(s) is/are used to
control and distribute power in an electrical system?
1. Fuse
2. Switches only
3. Relays only
4. Switches and relays

Back 21

Switches and relays

Front 22

Which of the following conditions will cause a fuse to open?
1. Excessive resistance
2. Excessive current
3. Excessive voltage
4. Excessive wattage

Back 22

Excessive current

Front 23

If the following fuses were rated the same, which one would have the smallest thermal inertia?
1. Slow-acting
2. Slow-blowing
3. Fast-acting
4. Time-delay

Back 23

Fast-acting

Front 24

When possible, a fuse should be operated at what percentage of its rated value?
1. 75%
2. 85%
3. 95%
4. 100%

Back 24

75%

Front 25

What type of fuse contains a
compound spring and link structure?
1. Fast-acting
2. Medium-acting
3. Vibration-resistant
4. Slow-acting

Back 25

Vibration-resistant

Front 26

What is the most common class of fuse holder used by the Navy?
1. Indicating
2. Nonindicating
3. Splashproof
4. Post-type

Back 26

Post-type

Front 27

Circuit breakers are rated in which of the following units of measurement?
1. Watts and amperes
2. Resistance and amperes
3. Watts and volts
4. Amperes and volts

Back 27

Amperes and volts

Front 28

What are the three basic types of circuit breakers?
1. Thermal, magnetic, thermomagnetic
2. Thermal, magnetic, trip-free
3. Trip-free, nontrip-free, toggle
4. Magnetic, toggle, disk

Back 28

Thermal, magnetic, thermomagnetic

Front 29

When there is a loss of generator power, what is the primary purpose of
an aircraft battery?
1. To start the engines
2. To operate specific instruments and radios
3. To maintain power for the
controls
4. To apply power to the emergency
warning systems

Back 29

To operate specific instruments and radios

Front 30

Running aircraft engines to provide electrical power is poor practice for which of the following reasons?
1. The danger to personnel from turning propellers
2. The danger to personnel from jet intakes and exhaust blast
3. The expense of operating highpowered engines
4. Each of the above

Back 30

Each of the above

Front 31

What prefix identifies a piece of SE that gives ac output power only?
1. NA
2. NB
3. NC
4. ND

Back 31

NB

Front 32

The mobile motor-generator set has which of the following characteristics?
1. Requires an external source of electrical power
2. Operates only on diesel fuel
3. Is used only on jet aircraft
4. Operates only with the NC-2A

Back 32

Requires an external source of electrical power

Front 33

The flight-line electrical
distribution system (FLEDS) receives electrical power from what source?
1. Deckedge power system, flight deck
2. Deckedge power system, hangar deck
3. Mobile electrical power plant
4. Underground power lines

Back 33

Mobile electrical power plant