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RCDD PRACTICE TEST EXAM LATEST WITH
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100%
GUARANTEED PASS!
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 - .....ANSWER ...✔✔ C
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
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D. 60 dB
E. 100 dB - .....ANSWER ...✔✔ B
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 - .....ANSWER ...✔✔ C
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 - .....ANSWER ...✔✔ A
A video camera has a coaxial cable output. The video
signal is to be distributed to devices that have balanced
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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 - .....ANSWER ...✔✔ A
The public telephone system is an example of a
__________ system.
A. Simplex
B. Half-duplex
C. Full-duplex
D. Purely analog
E. Purely digital - .....ANSWER ...✔✔ C
Wave division multiplexing (WDM) is most similar to:
A. Amplitude modulation
B. Frequency modulation
C. Time division multiplexing
D. Frequency division multiplexing
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E. Carrier sense multiple access with collision detection
(CSMA/CD) - .....ANSWER ...✔✔ D
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 - .....ANSWER ...✔✔ C
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 - .....ANSWER ...✔✔ D
RCDD PRACTICE TEST EXAM LATEST WITH
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100%
GUARANTEED PASS!
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 - .....ANSWER ...✔✔ C
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
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D. 60 dB
E. 100 dB - .....ANSWER ...✔✔ B
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 - .....ANSWER ...✔✔ C
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 - .....ANSWER ...✔✔ A
A video camera has a coaxial cable output. The video
signal is to be distributed to devices that have balanced
,3|Page
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 - .....ANSWER ...✔✔ A
The public telephone system is an example of a
__________ system.
A. Simplex
B. Half-duplex
C. Full-duplex
D. Purely analog
E. Purely digital - .....ANSWER ...✔✔ C
Wave division multiplexing (WDM) is most similar to:
A. Amplitude modulation
B. Frequency modulation
C. Time division multiplexing
D. Frequency division multiplexing
, 4|Page
E. Carrier sense multiple access with collision detection
(CSMA/CD) - .....ANSWER ...✔✔ D
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 - .....ANSWER ...✔✔ C
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 - .....ANSWER ...✔✔ D
