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BICSI RCDD-001 Exam Practice Questions (P. 3)

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Question #21
Which of the following is NOT a form of signal coupling between two (2) circuits?
  1. A
    Conductive
  2. B
    Inductive
  3. C
    Reactive
  4. D
    Capacitive
  5. E
    Electromagnetic

Correct Answer:
C

Question #22
The electromagnetic spectrum of visible light lies in the ___________ frequency range of the spectrum.
  1. A
    1 GHz
  2. B
    100 GHz
  3. C
    10 THz
  4. D
    1 PHz
  5. E
    100 PHz

Correct Answer:
D

Question #23
During a site survey you notice that several CRT displays in the vicinity of the engineering copy center have sporadic visual distortion. What is the MOST likely cause?
  1. A
    Electromagnetic interference (EMI)
  2. B
    Radio frequency interference (RFI)
  3. C
    (EMC)
  4. D
    Fast transients
  5. E
    Electromagnetic discharge (ESD)

Correct Answer:
A

Question #24
The potential for ______ occurs when devices or systems share a common electromagnetic environment and their operational frequencies overlap.
  1. A
    Electromagnetic interference (EMI)
  2. B
    (EMC)
  3. C
    Radio frequency interference (RFI)
  4. D
    Fast transients
  5. E
    Electrostatic discharge (ESD)

Correct Answer:
A

Question #25
Which of the following is an undesirable electromagnetic effect on a device(s)?
  1. A
    (EMC)
  2. B
    Electromagnetic interference (EMI)
  3. C
    Radio frequency interference (RFI)
  4. D
    Fast transients
  5. E
    Electrostatic discharge (ESD)

Correct Answer:
B

Question #26
You are required by architectural design to place UTP cables in the same space as unshielded power lines. How should you proceed with the placement of your cables?
  1. A
    Require the architect/electrical engineer to place shielding in the space before your UTP is placed.
  2. B
    You should provide a minimum separation of 610 mm (24 in).
  3. C
    You should provide a minimum separation of 229 mm (9 in).
  4. D
    You should provide a minimum of two 101 mm (4 in) RMC.

Correct Answer:
B

Question #27
You are placing Category 6 unshielded twisted-pair (UTP) in cable tray down a hallway past the elevator mechanical room. What action should you take to avoid effects of electromagnetic interference (EMI)?
  1. A
    Provide a minimum separation of 1194 mm (47 in)
  2. B
    Provide a minimum separation of 2060 mm (81 in)
  3. C
    Require the architect to install metallic foil shielding on the mechanical room walls
  4. D
    Provide RMC/IMC (rigid metallic conduit/intermediate metal conduit) through all areas within 4.6 m (15 ft) of the mechanical room

Correct Answer:
A

Question #28
The ability of a device to withstand electromagnetic disturbances from another device is:
  1. A
    Electromagnetic interference (EMI)
  2. B
    Radio Frequency Interference (RFI)
  3. C
    (EMC)
  4. D
    Fast transients
  5. E
    Electrostatic Discharge (ESD)

Correct Answer:
C

Question #29
A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n):
  1. A
    Unbalanced circuit
  2. B
    Grounded circuit
  3. C
    Poorly timed signal
  4. D
    Improper dielectric material

Correct Answer:
A

Question #30
You have discovered a common mode current on the metallic cable sheaths of your building riser cables. What is the MOST likely cause for you to investigate?
  1. A
    Lack of cable protection
  2. B
    Two separate and distinct ground references
  3. C
    Improper secondary protection
  4. D
    Improper physical protection of cable
  5. E
    Improper placement and/or termination of cables

Correct Answer:
B

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