CDC 2e151 Satellite, Wideband, And Telemetry Systems Journeyman Volume 1
CDC 2E151 Satellite, Wideband, and Telemetry Systems Journeyman Volume 1. This test consists of UREs and Self-Test Questions from volume 1, set 2.
- 1.What are the two types of nuclear environments?
- A.
Primary and derived.
- B.
Source and derived.
- C.
Primary and radiated.
- D.
Source and radiated.
- 2.What are the four primary nuclear environment elements?
- A.
Thermal radiation, electromagnetic pulse, transient radiation effects on electronics, and air blast and shock.
- B.
Thermal radiation, electromagnetic pulse, transient radiation effects on electronics, and weapon debris.
- C.
Thermally generated x-rays, neutrons, gamma rays, and weapon debris.
- D.
Thermally generated x-rays, neutrons, gamma rays, and airblast and shock.
- 3.High-altitude electronmagnetic pulse is what type of frequency phenomenon, and involves which frequency range?
- A.
Secondary; 1 Hz to 1GHz
- B.
Wideband; 1 Hz to 1 GHz
- C.
Secondary; 10 Hz to 10 GHz
- D.
Wideband; 10 Hz to 10 GHz
- 4.High-altitude electromagnetic pulse environment protection is important for critical, time-urgent mission systems because it
- A.
Has a vertical amplitude that decreases inversely with distance, but remains significant for many kilometers.
- B.
Has very intense radial electrical fields, azimuthal magnetic fields, and time-varying air conductivity.
- C.
Is the only nuclear environment that may be imposed on many systems simultaneously with the expenditure of very few weapons.
- D.
Is a problem for electronic components in satellites and reentry vehicles.
- 5.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 azimuth magnetic fields and time-varying air conductivity.
- D.
Influenced by the signal fading or waveform distortion caused by the structured plasma field.
- 6.What source region electromagnetic pulse region is produced by the interactions between the weapon products and the earth's atmosphere?
- A.
Secondary
- B.
Source
- C.
Radiated
- D.
Plasma
- 7.What source region electromagnetic pulse region has a primarily vertical electromagnetic pulse electric field and what structures are affected?
- A.
Radiated: antennas and boresite feedhorns
- B.
Plasma: antennas and boresite feedhorns
- C.
Secondary: cables and ground wires
- D.
Source: cables and ground wires
- 8.What derived nuclear environment causes communications blackout and seintillation effects?
- A.
Thermal radiation
- B.
Air blast and shock
- C.
Atmospheric disturbances
- D.
Trasient-radiation effects on electronics
- 9.A communications blackout can be produced by large attenuation of the
- A.
Transmitted signal causing the signal-to-noise ratio to fall below unity.
- B.
Transmitted signal causing the signal-to-noise ratio to rise above unity.
- C.
Recieved signal causing the signal-to-noise ratio to be equal to unity.
- D.
Recieved signal causing the signal-to-noise ratio to rise above unity.
- 10.Two high-altitude elctromagnetic pulse protection concerns involving today's electronic and communications systemss are protecting against massive system
- A.
Software corruption and permanent component damage.
- B.
Software corruption and permanent system damage.
- C.
Signal distortion and permanent component damage.
- D.
Operation disruption and permanent system damage.
- 11.What type of exterior system electromagnetic pulse coupling includes imperfectly sealed personnel access doors and equipment hatches, and improper installation of penetrating conductor protection?
- A.
Shield
- B.
Ground system
- C.
Intrastic conductor
- D.
Electronic enclosure
- 12.What is the reason we cannot draq reliable conclusions about the nature and degree of specific system susceptibility without a detailed test and evaluation?
- A.
All high-altitude electromagnetic pulse vulnerabilities may not be identified
- B.
All system malfunctions may not be corrected
- C.
Overall system system shielding maynot be identified
- D.
Overall environment may not be accessed
- 13.Broadband transmitter noise can often be eliminated by
- A.
Using a band pass filter.
- B.
Using a band reject filter.
- C.
Increasing output power.
- D.
Decreasing output power.
- 14.What type of electromagnetic interference occurs when a receiver responds to off-frequency signals?
- A.
Rusty Bolt
- B.
Co-channel
- C.
Brute force
- D.
Spurious responses
- 15.How can you normally eliminate electromagnetic interference 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
- 16.At what level does the Air Force want electromagnetic interference problems resolved?
- A.
Affected unit
- B.
Affected major command
- C.
Electromagnetic environmental effects office
- D.
Spectrum interference resolution office
- 17.What do you do when you are reasonably sure electromagnetic interference exists?
- A.
Request engineering assistance.
- B.
Contact the base frequency manager.
- C.
Systematically gather data for analysis.
- D.
Contact the Spectrum Interference Resolution office.
- 18.What type transmission line has concentric conductors and minimal radiation losses?
- A.
Coaxial
- B.
Twin lead.
- C.
Two wire open.
- D.
Parallel two wire.
- 19.The ratio of voltage to current at the input end of a transmission device is known as the
- A.
Load impedance.
- B.
Input impedance.
- C.
Output impedance.
- D.
Characteristic impedance.
- 20.What factor is important in determining how well energy transfers from the source to the load through a transmission line?
- A.
Input impedance.
- B.
Load impedance.
- C.
Output impedance.
- D.
Characteristic impedance.
- 21.What are three ways transmission lines dissipate power?
- A.
Radiation, heating, and reflection.
- B.
Heating, absorption, and refraction.
- C.
Radiation, reflection, and absorption.
- D.
Absorption, refraction, and radiation.
- 22.Waveguides are capable of handling more power than coaxial lines because the waveguide
- A.
Has less resistance than the coaxial line.
- B.
Has an are-over path twice as long.
- C.
Does not use dielectric support.
- D.
Has an inner silver coating.
- 23.What determines the size of a waveguide?
- A.
Cutoff frequency.
- B.
Operating frequency.
- C.
Amount of power transmitted.
- D.
Minimum frequency propagated.
- 24.In fiber optics, which component of the fiber is the optical transmission path?
- A.
Cladding.
- B.
Coating.
- C.
Buffer.
- D.
Core.
- 25.Which fiber-optic connector uses quick-release, keyed bayonet couplings that are preferred in situations where severe vibrations are not expected?
- A.
Biconic.
- B.
Field (FC).
- C.
Straight tip (ST).
- D.
Sub-miniature, type A (SMA).
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