RCDD TEST QUESTIONSBANK WITH GUARANTEED ACCURATE ANSWERS
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Course
RCDD
Institution
RCDD
RCDD TEST QUESTIONSBANK
RCDD TEST QUESTIONSBANK WITH GUARANTEED ACCURATE ANSWERS
C - Accurate AnswerIf the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:
A. 3 dB
B. 20 dB
C. 30 dB
D. 40 dB
E. 1000 dB
B - Accurate AnswerT...
RCDD TEST QUESTIONSBANK
2024\2025
RCDD TEST QUESTIONSBANK 2024\2025 WITH GUARANTEED ACCURATE
ANSWERS
C - Accurate Answer✅✅If the input signal power to a communication system is 1
W and the output power is 1 mW, the system attenuation is:
A. 3 dB
B. 20 dB
C. 30 dB
D. 40 dB
E. 1000 dB
B - Accurate Answer✅✅The signal at the input to a balanced twisted pair cable is
10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet.
This cable is connected to the input of a receiver. The noise level at the input to the
receiver is 1 microwatt. What is the signal-to- noise ratio (SNR) (dB) at the
receiver input?
,A. 10 dB
B. 30 dB
C. 40 dB
D. 60 dB
E. 100 dB
C - Accurate Answer✅✅A SONET OC-1 channel can carry 672 voice signals and
has a data rate of 51.84 Mbps. ASONET OC-48 channel can carry 32,256 voice
channels. What MINIMUM data rate is required for the OC-48 channel?
A. 155 Mbps
B. 622 Mbps
C. 2.5 Gbps
D. 5 Gbps
E. 10 Gbps
A - Accurate Answer✅✅All of the following are nominal wavelengths for laser
light sources EXCEPT:
A. 700 nm
B. 850 nm
C. 1300 nm
D. 1310 nm
E. 1550 nm
A - Accurate Answer✅✅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:
,A. Balun
B. Converter
C. Modulator
D. Cross connect
E. Transceiver
C - Accurate Answer✅✅The public telephone system is an example of a
__________ system.
A. Simplex
B. Half-duplex
C. Full-duplex
D. Purely analog
E. Purely digital
D - Accurate Answer✅✅Wave division multiplexing (WDM) is most similar to:
A. Amplitude modulation
B. Frequency modulation
C. Time division multiplexing
D. Frequency division multiplexing
E. Carrier sense multiple access with collision detection (CSMA/CD)
C - Accurate Answer✅✅You must place CAT6 cable above a factory floor with
automated welding machines and hammer forges. Of the following, what type of
shielding would be most effective?
A. Multi-layer braid
B. Foil and braid
, C. Solid metallic conduit
D. Flex metallic conduit
E. Sch. 40 PVC conduit
D - Accurate Answer✅✅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 shouldNOT be used?
A. Multimode
B. Singlemode
C. UTP
D. STP
A - Accurate Answer✅✅Two sinusoidal signals have the same amplitude (A) and
the same frequency (f). They differ in phase by 180 degrees. If these two signals
are added together, the result is a sinusoidal signal having an amplitude of:
A. Zero
B. 0.707A and a frequency of f
C. A and a frequency of 2f
D. 2A and a frequency of f
E. 2A and a frequency of 2f
A - Accurate Answer✅✅Composite conductors, although not generally
recommended, may be used in special circumstances because they provide all of
the following advantages EXCEPT:
A. Have good digital transmission characteristics
B. Lightweight
C. Inexpensive
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