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BICSI RCDD-001 Exam Questions
BICSI Registered Communications Distribution Designer (Page 7 )

Updated On: 24-Feb-2026
Page 7 of 73
PDF with 358 Questions

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. Require the architect/electrical engineer to place shielding in the space before your UTP is placed.
  2. You should provide a minimum separation of 610 mm (24 in).
  3. You should provide a minimum separation of 229 mm (9 in).
  4. You should provide a minimum of two 101 mm (4 in) RMC.

Answer(s): B



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. Provide a minimum separation of 1194 mm (47 in)
  2. Provide a minimum separation of 2060 mm (81 in)
  3. Require the architect to install metallic foil shielding on the mechanical room walls
  4. Provide RMC/IMC (rigid metallic conduit/intermediate metal conduit) through all areas within 4.6 m (15 ft) of the mechanical room

Answer(s): A



The ability of a device to withstand electromagnetic disturbances from another device is:

  1. Electromagnetic interference (EMI)
  2. Radio Frequency Interference (RFI)
  3. (EMC)
  4. Fast transients
  5. Electrostatic Discharge (ESD)

Answer(s): C



A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n):

  1. Unbalanced circuit
  2. Grounded circuit
  3. Poorly timed signal
  4. Improper dielectric material

Answer(s): A



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. Lack of cable protection
  2. Two separate and distinct ground references
  3. Improper secondary protection
  4. Improper physical protection of cable
  5. Improper placement and/or termination of cables

Answer(s): B






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