Volume 3 2A851
- 1.
1. (401) The primary reason the high-frequency radio uses single sideband modulation is
- A.
A. that fidelity is greatly increased
- B.
B. the transmitter output power is 10 watts
- C.
C. the system can use a very wide-band pass
- D.
D. that it provides many channels to operate on
Correct Answer
D. D. that it provides many channels to operate on -
- 2.
2. (401) The typical high-frequency radio has
- A.
A. 7,000 channels spaced 100 hertz apart
- B.
B. 7,000 channels spaced 25 kilohertz apart
- C.
C. 280,000 channels spaced 100 hertz apart
- D.
D. 280,000 channels spaced 25 kilohertz apart
Correct Answer
C. C. 280,000 channels spaced 100 hertz apart -
- 3.
3. (401) What is the transmitted frequency when a high-frequency radio control is set to 27.5 megahertz (MHz), the signal is modulated by a 1000-hertz tone, and lower sideband mode is selected?
- A.
A. 26.500
- B.
B. 27.499 MHz
- C.
C. 27.501 MHz
- D.
D. 27.600 MHz
Correct Answer
B. B. 27.499 MHz -
- 4.
4. (401) Which is true concerning high-frequency radio reception?
- A.
A. Antenna coupler is required to match antenna impedance
- B.
B. Audio fidelity is higher than in ultra-high frequency radios
- C.
C. The receiver sensitivity is more critical than receiver selectivity
- D.
D. The receiver must be capable of receiving unmodulated upper and lower sideband signals
Correct Answer
B. B. Audio fidelity is higher than in ultra-high frequency radios -
- 5.
5. (402) Which is not a mode of operation for the ARC–190 high-frequency radio system?
- A.
A. FM
- B.
B. AME
- C.
C. USB data
- D.
D. LSB voice
Correct Answer
A. A. FM -
- 6.
6. (402) You are using a learned preset for the ARC–190 high-frequency radio system. For this application, the transmit tune time is less than
- A.
A. 5 milliseconds
- B.
B. 25 milliseconds
- C.
C. 35 milliseconds
- D.
D. 50 microseconds
Correct Answer
C. C. 35 milliseconds -
- 7.
7. (402) Which version of the ARC–190 high-frequency radio system receiver-transmitter must be installed to operate properly if the system has a CU–2275(V)1 high-frequency coupler installed?
- A.
A. RT–1341(V)1.
- B.
B. RT–1341(V)2
- C.
C. RT–1341(V)3
- D.
D. Any of the above
Correct Answer
D. D. Any of the above -
- 8.
8. (402) In the ARC–190 high-frequency radio system, the high-frequency coupler matches the impedance of the antenna to the receiver-transmitter in order to
- A.
A. increase the voltage standing wave ratio
- B.
B. give maximum power transfer
- C.
C. increase receiver selectivity
- D.
D. increase receiver sensitivity
Correct Answer
B. B. give maximum power transfer -
- 9.
9. (403) A very-high frequency FM radio is mainly used on aircraft that
- A.
A. contact ground forces
- B.
B. use Air Force controlled airfields
- C.
C. contact airborne tankers for fuel
- D.
D. are under the control of civilian air traffic controllers
Correct Answer
A. A. contact ground forces -
- 10.
10. (403) Which very-high frequency radio system would have the best chance of receiving a signal from a station located beyond the horizon?
- A.
A. Localizer/glideslope
- B.
B. Very-high frequency AM
- C.
C. Very-high frequency FM
- D.
D. Very-high frequency omnirange
Correct Answer
C. C. Very-high frequency FM -
- 11.
11. (403) Which very-high frequency radio system uses two antennas?
- A.
A. FM homing
- B.
B. AM communications
- C.
C. FM communications
- D.
D. AM direction-finder
Correct Answer
A. A. FM homing -
- 12.
12. (404) On which frequencies can the ARC–186 very-high frequency radio not transmit in the AM mode?
- A.
A. 30 to 87.975 megahertz
- B.
B. 38 to 87.975 megahertz
- C.
C. 108 to 115.975 megahertz
- D.
D. 116 to 151.975 megahertz
Correct Answer
C. C. 108 to 115.975 megahertz -
- 13.
13. (404) The frequency range of the ARC–186 very-high frequency radio receiver in the FM mode is from
- A.
A. 30 to 87.975 megahertz
- B.
B. 38 to 87.975 megahertz
- C.
C. 108 to 151.975 megahertz
- D.
D. 116 to 151.975 megahertz
Correct Answer
A. A. 30 to 87.975 megahertz -
- 14.
14. (404) We call the C–11029/ARC–186 a true comm/nav control box because
- A.
A. rivet work force changed its design
- B.
B. it controls both the very-high frequency AM and FM systems
- C.
C. it controls both the very-high frequency radio and the VOR/ILS receiver
- D.
D. automatic direction finding and homing share as many characteristics with the navigation systems as they do with communication systems
Correct Answer
C. C. it controls both the very-high frequency radio and the VOR/ILS receiver -
- 15.
15. (405) How many frequencies are available for use by the main receiver in the ARC–164 ultra-high frequency radio?
- A.
A. 10000
- B.
B. 7000
- C.
C. 3500
- D.
D. 7
Correct Answer
B. B. 7000 -
- 16.
16. (406) The Have Quick II frequency-hopping pattern and rate is programmed by the
- A.
A. time-of-day
- B.
B. word-of-day
- C.
C. net number used
- D.
D. universal time coordinated
Correct Answer
B. B. word-of-day -
- 17.
17. (406) The Have Quick II radio’s entry point in the frequency-hopping pattern is established by the word-of-day; however, it is actually programmed by
- A.
A. time-of-day
- B.
B. the net number
- C.
C. multiple word-of-day
- D.
D. universal time coordinated
Correct Answer
B. B. the net number -
- 18.
18. (406) When not operating in the secure voice mode, two signals are received simultaneously on the same operating net, the Have Quick II radio automatically goes into conferencing. It does this by
- A.
A. resetting the net number for communication
- B.
B. setting the receiver to narrowband reception
- C.
C. injecting a beat frequency to prevent loss of intelligence
- D.
D. offsetting the second transmitter frequency by 25 kilohertz
Correct Answer
D. D. offsetting the second transmitter frequency by 25 kilohertz -
- 19.
19. (406) An advantage of the remote Have Quick II configuration over the panel mount configuration in an aircraft is that it
- A.
A. is more convenient for maintenance
- B.
B. can be used with a remote channel indicator
- C.
C. reduces cost by using existing aircraft wiring
- D.
D. can be used with a ultra-high frequency direction finding system
Correct Answer
C. C. reduces cost by using existing aircraft wiring -
- 20.
20. (406) The HAVE QUICK II multiple word-of-day modification provided loading capacity that allows entry of up to
- A.
A. two words-of-day for 2 day use
- B.
B. four words-of-day for 4 day use
- C.
C. six words-of-day for 6 day use
- D.
D. eight words-of-day for 8 day use
Correct Answer
C. C. six words-of-day for 6 day use -
- 21.
21. (407) What LRU provides primary control of the ARC–210 radio system?
- A.
A. Radio set control
- B.
B. Remote tuning panel
- C.
C. Receiver/transmitter
- D.
D. Remote volume control
Correct Answer
B. B. Remote tuning panel -
- 22.
22. (407) Which LRU will automatically take over in the event of a failure in the ARC–210 radio system primary control method?
- A.
A. Radio set control
- B.
B. Control display unit
- C.
C. Remote tuning panel
- D.
D. Remote volume control
Correct Answer
B. B. Control display unit -
- 23.
23. (407) The remote tuning panel cannot control the ARC–210 radio system if the
- A.
A. radio set control is turned on
- B.
B. radio set control is turned off
- C.
C. remote volume control is turned on
- D.
D. remote volume control is turned off
Correct Answer
A. A. radio set control is turned on -
- 24.
24. (407) If the ARC–210 radio system high pass filter is inoperable, what symptom(s) may be present to the radio operator?
- A.
A. Receiving FM commercial stations below 108 MHZ
- B.
B. Receiving FM commercial stations above 108 MHZ
- C.
C. Bleedover of aircraft’s FM transmissions below 108 MHZ
- D.
D. Bleedover of aircraft’s FM transmissions above 108 MHZ
Correct Answer
A. A. Receiving FM commercial stations below 108 MHZ -
- 25.
25. (408) What LRU is used to control the ARC–210 radio system in the event of a dual integrating processing failure?
- A.
A. Radio set control
- B.
B. Control display unit
- C.
C. Remote tuning panel
- D.
D. Remote volume control
Correct Answer
A. A. Radio set control -
- 26.
26. (408) How do you swap the active and standby frequencies of the ARC–210 radio system using the remote tuning panel?
- A.
A. Pressing the outer knob
- B.
B. Pressing the inner knob
- C.
C. Rotating the outer knob
- D.
D. Rotating the inner knob
Correct Answer
B. B. Pressing the inner knob -
- 27.
27. (408) The ARC–210 radio system must be tuned within which frequency range to receive tactical/close air support information? a. 30 to 87.975 MHz. b. 108 to 117.975 MHz. c. 156 to 173.975 MHz. d. 225 to 399.975 MHz.
- A.
A. 30 to 87.975 MHz
- B.
B. 108 to 117.975 MHz
- C.
C. 156 to 173.975 MHz
- D.
D. 225 to 399.975 MHz
Correct Answer
A. A. 30 to 87.975 MHz -
- 28.
28. (409) Which one of the following frequencies is not reserved for emergency use?
- A.
A. 8.0 MHz
- B.
B. 40.5 MHz
- C.
C. 121.5 MHz
- D.
D. 243.0 MHz
Correct Answer
A. A. 8.0 MHz -
- 29.
29. (409) Parachute emergency radios transmit on the
- A.
A. VHF-AM emergency frequency
- B.
B. VHF-FM emergency frequency
- C.
C. UHF emergency frequency
- D.
D. HF emergency frequency
Correct Answer
C. C. UHF emergency frequency -
- 30.
30. (409) The PRC–90 hand-held emergency radio transmits on what two fixed channels?
- A.
A. 8.0 and 121.5 MHz
- B.
B. 243.0 and 282.8 MHz
- C.
C. 254.5 and 282.8 MHz
- D.
D. 121.5 and 243.0 MHz
Correct Answer
B. B. 243.0 and 282.8 MHz -
- 31.
31. (409) Which one of the following is not an operating mode of the PRC–90 emergency radio?
- A.
A. Morse code
- B.
B. Two-way voice communication
- C.
C. Three-way voice communications
- D.
D. Variable audio modulation between 1000 and 300 Hz
Correct Answer
C. C. Three-way voice communications -
- 32.
33. (409) The emergency communications system that emits pulses of high-frequency sound is the
- A.
A. parachute radio (PR).
- B.
B. crash position indicator (CPI).
- C.
C. underwater acoustical beacon (UAB).
- D.
D. emergency locator transmitter (ELT).
Correct Answer
C. C. underwater acoustical beacon (UAB). -
- 33.
32. (409) The emergency communications system that deploys from the aircraft before or at impact to give it a better chance of surviving a crash is the
- A.
A. parachute radio (PR)
- B.
B. crash position indicator (CPI)
- C.
C. underwater acoustical beacon (UAB)
- D.
D. emergency locator transmitter (ELT)
Correct Answer
B. B. crash position indicator (CPI) -
- 34.
34. (410) The underwater acoustical beacon can operate in fresh or salt water to a depth of
- A.
A. 15,000 feet
- B.
B. 20,000 feet
- C.
C. 25,000 feet
- D.
D. 30,000 feet
Correct Answer
B. B. 20,000 feet -
- 35.
35. (410) Inadvertent activation of the underwater acoustical beacon from moisture is prevented by
- A.
A. a switch design
- B.
B. an aluminum alloy case
- C.
C. the aircraft mounting method
- D.
D. a predetermined resistance threshold
Correct Answer
A. A. a switch design -
- 36.
36. (411) When activated, the emergency locator transmitter continuously transmits on frequencies
- A.
A. 8.0 and 121.5 MHz
- B.
B. 243.0 and 282.8 MHz
- C.
C. 254.5 and 282.8 MHz
- D.
D. 121.5 and 243.0 MHz
Correct Answer
D. D. 121.5 and 243.0 MHz -
- 37.
37. (411) What switch on the emergency locator transmitter (ELT) resets the impact sensor circuits to a predetermined level after installation of the ELT?
- A.
A. AUTO-OFF-RESET switch
- B.
B. ELT operation switch
- C.
C. g-force reset switch
- D.
D. Master switch
Correct Answer
C. C. g-force reset switch -
- 38.
39. (412) The term used to describe the lines used to determine whether a transceiver connected to the interphone system will be in the transmit or receive condition is
- A.
A. control lines
- B.
B. receiver audio lines
- C.
C. system ground lines
- D.
D. microphone audio lines
Correct Answer
A. A. control lines -
- 39.
38. (412) One purpose of the interphone system is to
- A.
A. prevent the radio transmitters from being over modulated
- B.
B. remove amplitude variations from the aircraft warning tones
- C.
C. provide a means of keying and modulating the radio transmitters
- D.
D. filter out 60-Hz hum in the audio signals going to the radio systems
Correct Answer
C. C. provide a means of keying and modulating the radio transmitters -
- 40.
40. (413) The C–6567/AIC–25 interphone set control
- A.
A. is a bulkhead-mounted unit
- B.
B. has a five-position rotary select switch used to key the radios
- C.
C. has eight monitor/volume controls that are switches and potentiometers
- D.
D. has a main volume control used to compensate for the weak audio of a radio system
Correct Answer
C. C. has eight monitor/volume controls that are switches and potentiometers -
- 41.
41. (413) The purpose of the +17 to +29 VDC on the CALL control line of the C–6567 is to
- A.
A. reduce the level of CALL audio output.
- B.
B. disable the mic amplifier during CALL operation.
- C.
C. activate the AGC circuits in the headset amplifiers.
- D.
D. energize the CALL switch on the front panel of the C–6624.
Correct Answer
C. C. activate the AGC circuits in the headset amplifiers. -
- 42.
42. (413) The CALL switch applies a DC voltage to the CALL control line and activates the AGC circuits in all aircraft control panel’s headset amplifiers causing the CALL audio to be heard at least how many dB louder than any other signals present?
- A.
A. 2.
- B.
B. 4.
- C.
C. 6.
- D.
D. 8.
Correct Answer
C. C. 6. -
- 43.
43. (413) Which crewmembers will receive messages during hot-mic operation?
- A.
A. Only those with the INT switch activated.
- B.
B. All those connected to the interphone system.
- C.
C. Only those with the hot-mic talk switch activated.
- D.
D. Only those with the hot-mic listen switch activated.
Correct Answer
D. D. Only those with the hot-mic listen switch activated. -
- 44.
44. (413) Which transmission operation of the interphone system is most advantageous to pilots/copilots?
- A.
A. One-button operation because it is less time consuming.
- B.
B. One-button operation because it allows pilot/copilot to talk on radios and maintain comm with crew.
- C.
C. Two-button operation because it is less time consuming.
- D.
D. Two-button operation because it allows pilot/copilot to talk on radios and maintain comm with crew.
Correct Answer
D. D. Two-button operation because it allows pilot/copilot to talk on radios and maintain comm with crew. -
- 45.
45. (413) The C–6624/AIC–25 allows a crewmember to talk on the
- A.
A. hot-mic and CALL functions.
- B.
B. two-button and CALL functions.
- C.
C. CALL and interphone functions.
- D.
D. hot-mic and interphone functions.
Correct Answer
C. C. CALL and interphone functions. -
- 46.
46. (413) The major difference between the U–92A/U and the U–94A/U jack is the
- A.
A. U–92A/U jack has a PTT button.
- B.
B. U–94A/U jack has a PTT button.
- C.
C. U–94A/U is located on the pilot’s throttle grip.
- D.
D. U–92A/U requires an additional wire for the talk switch.
Correct Answer
B. B. U–94A/U jack has a PTT button. -
- 47.
47. (413) When connecting the WM–85/U interphone cable to the U–94A/U, what wire color is connected to the PTT button on the U–94A/U?
- A.
A. White.
- B.
B. Green.
- C.
C. Black.
- D.
D. Yellow.
Correct Answer
D. D. Yellow. -
- 48.
48. (414) Which is not a level of built-in-test (BIT) on the airborne digital interphone system?
- A.
A. Power-up BIT.
- B.
B. Degraded BIT.
- C.
C. Continuous BIT.
- D.
D. Maintenance BIT.
Correct Answer
B. B. Degraded BIT. -
- 49.
49. (414) The airborne digital interphone system (ADIS) interphone audio control panel provides monitoring facilities for listening to audio signals on how many possible channels?
- A.
A. 8.
- B.
B. 10.
- C.
C. 12.
- D.
D. 14.
Correct Answer
B. B. 10. -
- 50.
50. (414) The VOL adjustment on the ADIS interphone audio control panel allows the operator to
- A.
A. only adjust received signals individually.
- B.
B. only adjust combined received signals simultaneously.
- C.
C. adjust combined received signals simultaneously or individually.
- D.
D. adjust combined transmit and receive signals simultaneously or individually.
Correct Answer
C. C. adjust combined received signals simultaneously or individually. -
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