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RCDD PRACTICE TEST EXAM WITH CORRECT 120+ WITH ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST 2024 – 2025 ALREADY GRADED A+ $14.99
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RCDD PRACTICE TEST EXAM WITH
CORRECT 120+ WITH ACTUAL QUESTIONS
AND CORRECTLY WELL DEFINED ANSWERS
LATEST 2024 – 2025 ALREADY GRADED A+
A - ANSWERS-Which of the following protocols is referred to under ISO 16484-5?
A. BACnet
B. ARCnet
C. European installation bus
D. EMSLan
E. LonMark
D - ANSWERS-What type of facility requires a building automation system (BAS)
device to be located every 5 sq m (50 sq ft)?
A. Hotel guest room
B. Education classroom
C. Hospital
D. Mechanical room
E. Factory
,B - ANSWERS-What is the expected lumenance value, in watts, of a 200 watt
fluorescent lamp after three years?
A. 120 watts
B. 140 watts
C. 160 watts
D. 180 watts
E. 200 watts
C - ANSWERS-What is the expected life cycle, in years, of building automation
system within a building structure with a life cycle of 40+ years?
A. 1 to 2
B. 2 to 4
C. 5 to 7
D. 8 to 12
E. 12 to 15
A - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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?
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