FREE Registered Communications Distribution Designer (RCDD): Network Design Principles and Practice Questions and Answers

Question 1

If a communication system receives an input signal power of 1 watt and produces an output power of 1 milliwatt, what is the measure of system attenuation?

Accepted Answer

30 dB

Answer

1000 dB

Answer

20 dB

Answer

40 dB

Question 2

In a scenario where a video camera provides a video signal through a coaxial cable output and the intention is to transmit the signal to devices equipped with balanced twisted pair inputs, how can the conversion between these dissimilar transmission media be effectively achieved?

Accepted Answer

Balun

Answer

Modulator

Answer

Cross connect

Answer

Converter

Question 3

In a situation where CAT6 cable installation is required above a factory floor housing automated welding machines and hammer forges, which among the following choices for shielding would offer the highest degree of effectiveness?

Accepted Answer

Solid metallic conduit

Answer

Flex metallic conduit

Answer

Foil and braid

Answer

Sch. 40 PVC conduit

Question 4

When considering slip sleeves or gutters, which of the following statements accurately reflects their characteristics or attributes?

Accepted Answer

Provides more space for pulling

Answer

Must be equal in size to the main conduit

Answer

Can be used as a splice location

Answer

Cannot be used in place of a pull box

Question 5

An illustration of which kind of system is found in the public telephone system?

Accepted Answer

Full-duplex

Answer

Purely analog

Answer

Purely digital

Answer

Half-duplex

Question 6

Given that an existing ceiling raceway system possesses 115,000 square millimeters (177 square inches) of cross-sectional area intended for the distribution of cable runs, what is the maximum number of cable runs that can be accommodated by this pre-existing system?

Accepted Answer

177

Answer

189

Answer

195

Answer

160

Question 7

Given a balanced twisted pair cable with an input signal strength of 10 milliwatts, and considering that the cable extends for a length of 1000 feet with an attenuation rate of 1 decibel per 100 feet, what would be the signal-to-noise ratio (SNR) in decibels at the input of the receiver?

Accepted Answer

30 dB

Answer

40 dB

Answer

60 dB

Answer

100 dB