RCDD-001

RCDD-001 practice questions, page 3 of 15, with answer review and explanations.

Question 11

Assume that the optical power transmitted by a 62.5/125 multimode fiber is distributed uniformly across its core. If this fiber is perfectly coupled (i.e., the two fibers are aligned and abutted) to a 50/125 fiber, what is the percent of power that is lost?

  1. 0 percent
  2. 36 percent
  3. 50 percent
  4. 80 percent
  5. 100 percent

Question 12

You must place a cable between 2 equipment locations with separate grounds having a potential difference between them of 2.1 V rms. Which one of the following cables should NOT be used?

  1. Multimode
  2. Singlemode
  3. UTP
  4. STP

Question 13

A video camera has a coaxial cable output. The video signal is to be distributed to devices that have balanced twisted pair inputs. The transition between these two different transmission media can be accomplished by using a:

  1. Balun
  2. Converter
  3. Modulator
  4. Cross connect
  5. Transceiver

Question 14

Optical transmitters are typically one of the following types EXCEPT:

  1. Light-emitting diode (LED)
  2. Short wavelength laser compact disc (CD)
  3. Vertical cavity surface emitting laser (VCEL)
  4. Laser diode (LD)
  5. Overfilled launch (OFL)

Question 15

All of the following are nominal wavelengths for laser light sources EXCEPT:

  1. 700 nm
  2. 850 nm
  3. 1300 nm
  4. 1310 nm
  5. 1550 nm