38. (012) What initial nuclear radiation elements generate electromagnetic pulses?

a. Gamma rays and neutrons.

b. Thermally generated x-rays.

c. Transient radiation effects on electronics.

d. Neutrons and thermally generated X-rays.

39. (012) High-altitude electromagnetic pulse is what type of frequency phenomenon, and involves which frequency range?

a. Secondary; 1 hertz to 1 gigahertz.

b. Wideband; 1 hertz to 1 gigahertz.

c. Secondary; 10 hertz to 10 gigahertz.

d. Wideband; 10 hertz to 10 gigahertz.

40. (012) A system-generated electromagnetic pulse is a problem for satellites and reentry vehicles that are

a. susceptible to the wideband frequency phenomenon.

b. directly exposed to nuclear radiations from a high-altitude burst.

c. affected by the azimuthal magnetic fields and time-varying air conductivity.

d. influenced by the signal fading or waveform distortion caused by the structured plasma field.

41. (012) Which distinct region of the source region electromagnetic pulse is produced by the interactions between the weapon products and the earth’s atmosphere?

a. Secondary.

b. Radiated.

c. Plasma.

d. Source.

42. (012) What electromagnetic pulse region is the principal threat to electronic systems by cable?

a. Local.

b. Source.

c. Radiated.

d. Long-line.

43. (012) How does scintillation effects communications? a. Large attenuation of the transmitted signal causing the received signal-to-noise ratio (SNR) to fall below unity.

b. Transmitted signal fading caused by multiple path propagation through the structured plasma field.

c. Layers of charged electrons that are trapped and prevent transmissions through the layer.

d. Absorption of the transmitted signal through the contaminated area.

44. (012) Atmospheric disturbances from initial nuclear radiation on higher frequencies affect communications by which types of effects?

a. Blackout.

b. Absorption.

c. Scintillation.

d. Attenuation.

45. (013) Which one of the following statements are true concerning shielding?

a. Cables should be of unshielded construction.

b. Only ventilation ports are shielded along the walls.

c. Sensitive equipment will be located within the shielded barrier.

d. All power lines supplying shielded areas does not require filters.

46. (013) What is the purpose of bonding?

a. To isolate facility from any external electrical electromagnetic propagation.

b. To reduce interference coupling around circuits and around interconnecting lines.

c. To ensure a mechanically strong, low impedance interconnection between metal objects.

d. To eliminate harmful differences of potential between the various telephone cables entering facility.

47. (013) Which types of filters are always used in combination with surge arresters?

a. Linear.

b. Alternating current (AC) line.

c. Direct current (DC) DC line.

d. Power line.

48. (014) If the interference can be eliminated by disconnecting the receiving antenna, the source of the disturbance is most likely

a. line noise.

b. internal to the radio.

c. external to the radio.

d. radio receiver trouble.

49. (014) What is an example of intentionally induced electromagnetic interference (EMI)?

a. Jamming.

b. Spurious responses.

c. Intermodulation.

d. Power line noise.

50. (014) What type of electromagnetic interference (EMI) occurs when a receiver responds to off-frequency signals? a. Rusty Bolt.

b. Co-channel.

c. Brute force.

d. Spurious responses.

51. (014) What type of equipment often generates many spurious emissions?

a. Slow tuning receiver.

b. Rapid tuning receiver.

c. Slow tuning transmitter.

d. Rapid tuning transmitter.

52. (014) What man-made noise results from voltage surges, arcing, or corona discharges?

a. Relays.

b. Lighting.

c. Power line.

d. Switching equipment.

53. (014) How can you normally eliminate electromagnetic interference (EMI) noise bursts caused by sodium and mercury vapor lights that have stopped working while the power is still applied?

a. Change the bulb.

b. Ground out the light fixture.

c. Install a noise reject filter on the light.

d. Install a noise reject filter on the receiver.

54. (015) What Air Force program is used to resolve an electromagnetic interference (EMI) incident?

a. Mishap prevention.

b. Frequency management (FM).

c. Electrostatic discharge (ESD) control.

d. Spectrum interference resolution (SIR).

55. (015) At what level does the Air Force want electromagnetic interference (EMI) problems resolved?

a. Affected unit.

b. Affected major command.

c. Electromagnetic environmental effects office.

d. Spectrum interference resolution office.

56. (015) What is the first step in the Air Force spectrum interference resolution (SIR) program?

a. Identify the source.

b. Verifying the source.

c. Resolving the interference.

d. Reporting the interference.

57. (015) What do you do when you are reasonably sure electromagnetic interference (EMI) exists?

a. Request engineering assistance.

b. Contact the base frequency manager.

c. Systematically gather data for analysis.

d. Contact the spectrum interference resolution (SIR) office.

58. (015) Who is initially responsible for reporting an electromagnetic interference (EMI)?

a. The operator.

b. Major command (MAJCOM).

c. The frequency manager (FM).

d. Federal Communications Commission (FCC).

59. (015) Which Air Force service provides on-site direction finding and interference problem analysis?

a. USAF Gold Flag Program.

b. Unit Self-Sufficiency Support.

c. Reliability and Maintainability Deficiency.

d. Quick Fix Interference Reduction Capability.

60. (015) What program addresses persistent and recurring interferences problems in joint operations?

a. The reliability and maintainability.

b. Joint Spectrum Interference Resolution (SIR).

c. Air Force Spectrum Interference Resolution (AFSIR).

d. The Quick Fix Interference Reduction Capability (QFIRC).

61. (015) Who is tasked to provide interference resolution support to the unified commanders?

a. The operator.

b. Joint Spectrum Center (JSC).

c. Installation spectrum manager (ISM).

d. Federal Communications Commission (FCC).