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92 Cards in this Set
- Front
- Back
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Sending a message on several frequencies at once is an example of which of the following transmission types?
1. Time Diversity 2. Frequency Diversity 3. Amplitude Diversity 4. Inter-Modulation |
Frequency Diversity
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what type of diversity uses physically separated transmit and receive antennas to improve communications?
1. Time 2. Amplitude 3. Space 4. Frequency |
Space
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One terminal in a link has its equipment setup in simplex. The other terminal is using two channels or frequencies in a configuration that allows sending and receiving of different messages at the same time. These two terminals working together make up what mode of operation?
1. Semi-Duplex 2. Full-Duplex 3. Quasi-Duplex 4. Half-Duplex |
Semi-Duplex
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A transmitted electromagnetic wave enters an antenna, induces a voltage into it, and passes that voltage to a receiver. What is this chain of events called?
1. Selection 2. Reception 3. Detection 4. Detention |
Reception
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When a receiver picks one frequency out from all other frequencies, it's performing which of the following basic functions?
1. Selection 2. Detection 3. Reception 4. Conception |
Selection
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When a receiver separates the audio frequencies from the radio-frequency carrier it is performing which of the following basic functions?
1. Reproduction 2. Detection 3. Selection 4. Reception |
Detection
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The receiver action of converting electrical energy to a usable format, such as sound, is an example of which of the following basic functions?
1. Reproduction 2. Detection 3. Selection 4. Reception |
Reproduction
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Which of the following measurements provides an indication of the ability of a receiver to reproduce weak signals?
1. Selectivity 2. Fidelity 3. Sensitivity 4. Noise |
Sensitivity
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Overall sensitivity of a receiver is limited by which of the following factors?
1. Selectivity 2. Fidelity 3. Sensitivity 4. Noise |
Noise
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How is a receiver's ability to reject unwanted signals and receive desired signals determined?
1. Selectivity 2. Fidelity 3. Sensitivity 4. Noise |
Selectivity
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The IF in a receiver is produced by which of the following methods?
1. Compression 2. Mixing 3. Splicing 4. Heterodyning |
Heterodyning
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The process of heterodyning takes place in which of the following receiver circuits?
1. Amplifier 2. Modulator 3. Mixer 4. Silencer |
Mixer
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The process of simultaneous transmission of several intelligible signals on the same frequency during the same period of time is called?
1. Multiplexing 2. Jamming 3. Detecting 4. Selecting |
Multiplexing
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Which of the following categories of electromagnetic interference includes interference generated by electrically charged raindrops?
1. Man-made 2. Natural 3. Inherent 4. Passing |
Natural
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Which of the following methods of reducing RF burn hazards is the most useful and widespread technique used?
1. Bond and Ground all metallic objects 2. Use plastic bags 3. Weld rubbermatting to objects 4. Don't use RF |
Bond and Ground all metallic objects
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The greatest hazard from thermal effects appears to come from equipment operated in which of the following frequency ranges?
1. 3-30Mhz 2. 30-300Khz 3. 3-30Khz 4. 1-3Ghz |
1-3Ghz
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You have been working on a piece of equipment and your eyes have been exposed to high-intensity microwaves. Which of the following types of eye problems may occur?
1. Lazy eye 2. Cross eyed 3. Cataracts 4. Red eye |
Cataracts
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In a line of sight communications system, propagation is affected by which of the following layers of the atmosphere?
1. Ionosphere 2. Mesosphere 3. Troposphere 4. Exosphere |
Troposphere
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Who was awarded both the Medal of Honor and Gold Life Saving Medal?
1. Douglas Munro 2. Roymaond J. Evans 3. Marcus Hanna 4. Joshua James |
Marcus Hanna
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What is the reference for Current Ship's Maintenance Project (CSMP)'s?
1. CIM 10550.25 2. NAVENG 9000.6D 3. CIM 100.3D 4. MIL-STD-188 |
NAVENG 9000.6D
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What is not a factor on control/multi-conductor cable?
1. Impedance 2. Color 3. Thickness 4. Current |
Impedance
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How often is portable test equipment checked?
1. Daily 2. Weekly 3. Monthly 4. Quarterly |
Quarterly
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Tie wraps on a cable bundle should be how far apart?
1. 18 Inch Apart 2. 2.5X diameter not more than 10 Inch 3. 10 Inch or wider 4. 2.5 Inch or 10 X diameter |
2.5X diameter not more than 10 Inch
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Category B Navy FBR's should be mailed to?
1. NEC 2. SFLC 3. SILC 4. FTSC |
FTSC
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What reference is used for inspecting a workbench?
1. OSHA 2. NEC 3. DHS 4. LLC |
NEC
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What should the max resistance be between the metal case and ground on a power tool?
1. .1 ohms 2. 10 ohms 3. 1 ohm 4. 100 ohms |
1 ohm
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A workbench breaker should be rated at how many amps, according to the Electronics Manual?
1. 15 A 2. 25 A 3. 10 A 4. 20 A |
20 A
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How many volts are shorting probes rated for?
1. 50 KV 2. 5 KV 3. 25 KV 4. 10 KV |
25 KV
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How are cables run on a cutter for battle damage reasons?
1. Across hatches 2. On Decks 3. Inside Frames and Along Cable trays 4. Wrapped around piping |
Inside Frames and Along Cable trays
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How often are direction finders calibrated?
1. Monthly 2. Every 4 Months 3. Every 12 Months 4. Bi-Monthly |
Every 12 Months
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What determines the weekly PMS schedule?
1. Yearly Schedule 2. Monthly Schedule 3. Quarterly Schedule 4. Bi-Annual Schedule |
Quarterly Schedule
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What are the different cable classifications?
1. Active, Reactive, Passive 2. Active, Passive, susceptible 3. Passive, Susceptible, Reactive 4. Active, Passive, Reactive |
Active, Passive, susceptible
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A direction finder must be re-calibrated if it is off by how many degrees?
1. 4 2. 2 3. 5 4. 3 |
3
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How long can someone work inside the PEL while a mini-loop antenna is energized before harm to your
1. 3min 2. 6 min 3. 9 min 4. 121 min |
6 min
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Multi-conductor cable is bad when measured less than how many ohms between conductors?
1. 20 Khom 2. 30 Kohm 3. 50 Kohm 4. 75 Kohm |
50 Kohm
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Guy wire turnbuckle should have a what through it?
1. An Eyebeam 2. A Cover 3. A high glossy finish 4. A Safety Wire |
A Safety Wire
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When megging an antenna what is a good reading?
1. 200 Mohm 2. 200Kohm 3. 200 Ohm 4. 1 Ohm |
200 Mohm
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How can you achieve a better ground?
1. More grounding rods 2. Drive rods deeper 3. Use a star pattern 4. Bend rods at 90 Deg. ang |
Drive rods deeper
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High voltage signs need to be posted when voltages are over?
1. 100 V 2. 200 V 3. 300 V 4. 500 V |
500 V
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How close can you be to electronics with jewelry on?
1. 3FT 2. 4FT 3. 5FT 4. 6FT |
4FT
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How often is the lightning protection subsystem to be inspected?
1. Bi-Annually 2. Annually 3. Monthly 4. Quarterly |
Annually
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Navy preventative maintenance card that tells you specifically how to do something?
1. MPC 2. MRC 3. MBA 4. MLC |
MRC
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What type of field change furnishes documentation only?
1. Type 1 2. Type 2 3. Type 3 4. Type 4 |
Type 2
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What is the advice code for an 0C turn in items?
1. 5G 2. 5A 3. 5S 4. 5B |
5G
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How long does it take a radar pulse to travel one mile (back and forth)?
1. 12.36 mSec 2. 24.67 nSec 3. 2.34 pSec 4. .2 Sec |
12.36 mSec
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What is the form number for an allowance change request?
1. CG 4428 2. CG 5451 3. CG 5323 4. DD1149 |
CG 5323
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What type of antenna is operated with one end grounded?
1. Marconi 2. Dipole 3. Full Wave 4. Half-Wave |
Marconi
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Who maintains the CSMP's on cutters?
1. CO 2. XO 3. EO 4. AO |
EO
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To make changes to a CASREP, which of these actions do you need to do?
1. Email 2. New CASREP 3. CASREP Response 4. CASREP Update |
CASREP Update
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What type of field change furnishes documentation, parts, and special tools required to complete a change?
1. Type 1 2. Type 2 3. Type 3 4. Type 4 |
Type 1
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What type of field change implements changes to technical documentation only and requires no alteration to the equipment?
1. Type 1 2. Type 2 3. Type 3 4. Type 4 |
Type 4
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Fire control tracking radar usually produces what type of beam?
1. Long and Wide 2. Short and Wide 3. Long and short 4. Narrow and Circular |
Narrow and Circular
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What type of servo has a feedback loop?
1. Open loop 2. Whole loop 3. Half loop 4. Closed loop |
Closed loop
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What form is used to order publications?
1. CG 3307 2. CG 4428 3. CG 5451 4. CG 5323 |
CG 4428
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How many directorates are there?
1. 8 2. 9 3. 7 4. 11 |
11
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How many units work directly for headquarters?
1. 23 2. 32 3. 27 4. 35 |
35
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How many units work directly for headquarters?
1. 23 2. 32 3. 27 4. 35 |
35
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Where are ship's configuration change form OPNAV 4790/CK sent?
1. ALPA 2. SFLC 3. SILC 4. MLC |
SFLC
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What type of field change furnishes documentation and some of the required parts or special tools?
1. Type 1 2. Type 2 3. Type 3 4. Type 4 |
Type 3
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What four basic functions must a receiver perform?
1. Recepting, Dectction, Selection, Reproduction 2. Detection, Suspension, Reproduction, Selecting 3. Reception, Detection, Modulation, Selection 4. detection, selection, Reception, Reproduction |
Recepting, Dectction, Selection, Reproduction
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What are the four basic receiver characteristics?
1. Fideltiy, Sensitivitiy, Selectivity, Amplitude 2. Noise, Sensitivitiy, Fidelity, Amplitude 3. Selectivity, Noise, Fidelity, Clairity 4. sensitivity, Noise, Selectivity, fidelity |
sensitivity, Noise, Selectivity, fidelity
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What are the three basic parts of an Optical Fiber Cable?
1. Core, cladding, and Washer 2. core, cladding, and Wire 3. Core, cladding, and Coating 4. Core, Cladding, and Sheath |
Core, cladding, and Coating
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Which type of EMI is classified as natural interference?
1. Precipitaion Static 2. Arching 3. Electric Motor 4. Corona |
Precipitaion Static
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Distorted Audio on a receiver is caused by?
1. Over-Modulation 2. Old Batteries 3. Power Spikes 4. Malfunctioning Microphone |
Over-Modulation
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On ship's drawings, what is identified by sequential uppercase letters?
1. Year 2. Class 3. Compartment 4. Revision |
Revision
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What is the preferred ground for Coast Guard Communications-Electronics (C.E.) facilities?
1. Single-point 2. Floating 3. Plane 4. Multi-point |
Multi-point
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What governs tag-out procedures at shore units?
1. NEC 2. SFLC 3. Command Instruction 4. OSHA |
OSHA
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What is the max resistance to ground for an earth electrode subsystem in a non-communications electronics facility?
1. 5 Ohms 2. 10 Ohms 3. 20 Ohms 4. 25 Ohms |
25 Ohms
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What is the size of driven electrodes in the Coast Guard?
1. Eight feet by one half inch 2. ten feet by one half inch 3. eight feet by three quarter inch 4. ten feet by three quarter |
ten feet by three quarter
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What does MIP stand for in regards to Preventive Maintenance System (PMS)?
1. Maintenance In Progress 2. Mandatory Inspection Point 3. Maintenance Index Page 4. Mangement Implementation Plan |
Maintenance Index Page
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How often are checks and audits of all tag-outs performed?
1. Monthly 2. Daily 3. Weekly 4. Bi-Weekly |
Bi-Weekly
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What is a class A bonding?
1. Bolting 2. Welding 3. Clamping 4. Strapping |
Welding
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What is a class B bonding?
1. Bolting 2. Welding 3. Clamping 4. Strapping |
Bolting
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What is a class C bonding?
1. Bolting 2. Welding 3. Clamping 4. Strapping |
Strapping
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The 3 types of EMI are?
1. Man-made, Inherent, Natural 2. Inherent, Natural, Coherent 3. Man-made, Corherent, Inherent 4. Natural, Inherent, Coherent |
Man-made, Inherent, Natural
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Impedance between the ground buss and the fault protection subsystem shall be less than _____ Ohms?
1. .1 2. .5 3. 1 4. 5 |
.1
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Impedance between the ground buss and the fault protection subsystem shall be less than _____ A?
1. .1 2. .5 3. 1 4. 5 |
.1
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When discharging a lithium battery how long after discharge is the battery still dangerous _____ Min?
1. 10 2. 20 3. 30 4. 40 |
30
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When going into a yard period what type of PMS is required?
1. PU 2. LU 3. DD 4. WE |
LU
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What fund code is used for small arms ordinance AFC-____?
1. 77 2. 56 3. 30 4. 42 |
30
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Unit training shall be scheduled how far in advance?
1. 1 YEAR 2. 1 MONTH 3. 1 WEEK 4. 6 MONTHS |
1 Month
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What type of inventory is required for OM&S with a unit price of less than $1000 and allowance, SIM and non-SIM materials?
1. On the Spot 2. Un-Scheduled 3. Wall to Wall 4. Scheduled |
Scheduled
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What type of inventory requires a Bulkhead to Bulkhead / Wall to Wall?
1. Planned 2. Un-Scheluded 3. Regular 4. Scheduled |
Un-Scheluded
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Navy field changes are numbered consecutively beginning with what number?
1. 91 2. 1 3. 001 4. 11 |
1
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Coast Guard field changes for Navy equipment are numbered consecutively beginning with what number?
1. 91 2. 1 3. 001 4. 11 |
91
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The bend radius of a down conductor shall not be less than how many inches?
1. 6 2. 7 3. 8 4. 9 |
8
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The angle of any bend of a down conductor shall not be less than how many degrees?
1. 45 2. 90 3. 120 4. 180 |
90
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DC resistance across bonding and grounding junctions shall not exceed how many ohms?
1. .1 2. .5 3. 1 4. 5 |
.1
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What do you do to a whip antenna if it is being used for cold weather operations?
1. Gel-Coat antenna 2. Electrical Tape Wrap 3. Drill a one eighth hole in the base of each antenna at the lowest point 4. No preparations necessary |
Drill a one eighth hole in the base of each antenna at the lowest point
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What form do you use to record resistance checks on?
1. CG 5323 2. CG 5451 3. NAVSHIP 531 4. DD1149 |
NAVSHIP 531
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Which circuit in a receiver radiates interference?
1. Local Filter 2. Magnetron 3. Local Oscillator 4. Distance Filter |
Local Oscillator
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In order for galvanic corrosion to take place what must happen?
1. Water must flow 2. Reactance Must Flow 3. Current must flow 4. Metals must be the same |
Current must flow
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