Ground Radar Systems Journeyman CDC 4-6 #1
One shops CDC practise test. Not to sure of #91. Also, if any andswers are off. Please tell me. Thanks
- 1.What method does an A-scan indicator use to display video?
- A.
Z-axis modulation.
- B.
Intensity modulation
- C.
Deflection modulation
- D.
Amplitude modulation
- 2.What target information is provided by the plan-position indicator? (PPI)
- A.
Azimuth only
- B.
Elevation only
- C.
Range and azimuth
- D.
Elevation and range
- 3.What type of scan can “paint” a map of the area, to include areas if heavy rain or clouds?
- A.
A-scan.
- B.
B-scan.
- C.
Raster scans.
- D.
Plan-position indicator scan
- 4.In a Raster scan indicator, how many vertical scan periods does it take to produce one complete picture?
- A.
1
- B.
2
- C.
3
- D.
4
- 5.Which indicator component determines the overall operation of the indicator?
- A.
Data processing circuits.
- B.
Deflection circuits.
- C.
Video Circuits.
- D.
Cathode-ray tube
- 6.Which indicator component’s main purpose is to control the intensity of CRT electron beam?
- A.
Deflection circuits.
- B.
Video circuits
- C.
Power Supply.
- D.
Cathode-ray tube
- 7.Digital display data from the data processing circuits is converted into analog drive signal in the
- A.
Deflection circuits
- B.
Video circuits
- C.
Power supply
- D.
CRT
- 8.Electromagnetic deflection is accomplished by applying
- A.
Current through the two deflection plates.
- B.
Triggers to the two deflection plates
- C.
Current through the deflection coil
- D.
Triggers to the deflection coil
- 9.The vacuum in a cathode-ray tube (CRT)
- A.
Prevents implosion if the CRT is broken
- B.
Keeps the phosphor coating from burning
- C.
Eliminates static charges on the deflection plates
- D.
Prevents collision between electrons in the beam and air molecules
- 10.What is the leading edge-to-edge edge spacing between P1 and P3 of Mode 3?
- A.
0.45 µsec
- B.
3 µsec
- C.
5 µsec
- D.
8 µsec
- 11.The frequency used for identification friend or foe/selective identification feature (IFF/SIF) interrogations is
- A.
1030 MHz
- B.
1070 MHz
- C.
1090 MHz
- D.
1270 MHz
- 12.What information pulses are present in a code train that decodes as 5421?
- A.
A4, A1, B4, C2, D1.
- B.
C4, B3, B1, A4, D2
- C.
D4, B1, C2, D4, A1
- D.
B4, B1, C2, D4, A1.
- 13.An X pulse is present in an SIF code train when
- A.
A Mode 4 reply is being received
- B.
The aircraft is a pilotless drone or missile
- C.
The aircraft is declaring a military emergency
- D.
It is requested by the radar operator to identify the aircraft position
- 14.Which special response explains 7500 reply?
- A.
Communication failure.
- B.
Military emergency.
- C.
Engine failure
- D.
Hijacking
- 15.The AN/UPM-155 radar test set is capable of testing
- A.
Interrogators and associated components
- B.
Radar transmitter VZWR
- C.
Radar jamming strength
- D.
Radar receivers
- 16.What possible input voltage (s) may be supplied to the AN/UPM-155 radar test set for operation?
- A.
115 VAC
- B.
120 VAC
- C.
130 VAC
- D.
115 VAC or 230 VAC
- 17.What three components are included within electronic combat (EC).
- A.
Electronic attack (EA), suppression of enemy air defenses (SEAD), and electronic warfare (EW).
- B.
Electronic attack, suppression of enemy air defenses (SEAD), signal intelligence (SIGNT).
- C.
Command, control, and communication countermeasures (C³CM), suppression of enemy air defenses (SEAD), and electronic warfare (EW).
- D.
Command, control, and communication countermeasures (C³CM), suppression of enemy air defenses (SEAD), signal intelligence (SIGNT).
- 18.What are the three primary areas of electronic warfare?
- A.
Electronic warfare support (ES), electronic attack (EA), and electronic protection (EP).
- B.
Suppression of enemy air defenses (SEAD), Electronic warfare support (ES), electronic attack (EA).
- C.
Suppression of enemy air defenses (SEAD), Electronic warfare support (ES), and electronic protection (EP)
- D.
Electronic warfare support (ES), electronic attack (EA), Command, control, and communication countermeasures (C³CM).
- 19.What is the relatively new concept of employing electronic warfare support (ES)?
- A.
To exploit signal environment before an engagement
- B.
To provide a tactically oriented immediate response
- C.
To provide indirect support to theater commanders
- D.
To support long term intelligence
- 20.The primary role of the electronic warfare support (ES) is a wartime function that provides the military commander a capability that can
- A.
Prevent jamming from accruing
- B.
Identify all possible interferences
- C.
Isolate friendly from enemy forces
- D.
Integrate with other operational forces
- 21.Predictable external factors that affect electronic attack (EA) are
- A.
Troposheric scatter and burn through range.
- B.
Atmospheric attenuation and tropospheric scatter
- C.
Victim radar characteristic and burn through range
- D.
Atmospheric attenuation and victim radar characteristics.
- 22.The three major categories that noise jammers can be divided into are
- A.
Confusion jammers, spot jammers, and sweep jammers
- B.
Spot jammers, sweep jammers, and barrage jammers
- C.
Deception jammers, confusion jammers, and spot jammers
- D.
Deception jammers, confusion jammers, and barrage jammers
- 23.A decoy is
- A.
An expendable aircraft-like vehicle used to provide deception
- B.
An expendable aircraft-like vehicle used to gather information
- C.
A manned aircraft flown in a different sector to mislead operators
- D.
A manned aircraft flown at different altitudes to mislead operators
- 24.That transmitter fix is for synchronous pulsed jammers?
- A.
Staggered PRF
- B.
Coded Pulse Anti-Clutter System
- C.
Manual gain control
- D.
Frequency agility
- 25.What technique is used in a strong clutter or jamming environment to improve target detection?
- A.
Fast time constant (FTC)
- B.
Manual gain control (MGC).
- C.
Moving target indicator (MTI)
- D.
Instantaneous automatic gain control (IAGC)
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