RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
The public telephone system is an example of a __________ system.
A. Simplex
B. Half-duplex
C. Full-duplex
D. Purely analog
E. Purely digital C. Full-duplex
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) D. Frequency
division multiplexing
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
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
E. Sch. 40 PVC conduit C. Solid metallic conduit
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?
A. Multimode
B. Singlemode
C. UTP
D. STP D. STP
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. Zero
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
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
D. Easy to produce
E. Easily embedded into other materials A. Have good digital transmission characteristics
Which is an advantage of stranded conductors over solid conductors?
A. Less costly
B. Simpler terminations
C. Better high frequency performance
D. More flexible D. More flexible
The conversion of an analog speech signal to a pulse code modulation (PCM) digital signal
involves all of the following steps EXCEPT:
A. Low pass filtering
B. Periodic sampling
C. Quantizing
D. Companding
E. Amplitude modulation E. Amplitude modulation
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?
A. 0 percent
B. 36 percent
C. 50 percent
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
D. 80 percent
E. 100 percent B. 36 percent
Which of the following correctly lists the lowest frequency band to the highest frequency band?
A. MF, HF, VHF, UHF
B. UHF, VHF, HF, MF
C. HF, MF, UHF, VHF
D. VHF, UHF, MF, HF
E. HF, MF, UHF, VHF A. MF, HF, VHF, UHF
Time division multiplexing (TDM) systems are designed to transport ________ between end
point systems.
A. Only analog signals
B. Only digital signals
C. A mix of both analog and digital signals
D. Both analog and digital signals, but only one type at a time B. Only digital signals
A reasonable approximation for the signal speed in 100 ohm balanced twisted pair cable
is__________, where c is the velocity of light in free space.
A. 0.2 c
B. 0.4 c
C. 0.6 c
Questions And Answers Verified by Experts
The public telephone system is an example of a __________ system.
A. Simplex
B. Half-duplex
C. Full-duplex
D. Purely analog
E. Purely digital C. Full-duplex
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) D. Frequency
division multiplexing
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
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
E. Sch. 40 PVC conduit C. Solid metallic conduit
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?
A. Multimode
B. Singlemode
C. UTP
D. STP D. STP
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. Zero
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
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
D. Easy to produce
E. Easily embedded into other materials A. Have good digital transmission characteristics
Which is an advantage of stranded conductors over solid conductors?
A. Less costly
B. Simpler terminations
C. Better high frequency performance
D. More flexible D. More flexible
The conversion of an analog speech signal to a pulse code modulation (PCM) digital signal
involves all of the following steps EXCEPT:
A. Low pass filtering
B. Periodic sampling
C. Quantizing
D. Companding
E. Amplitude modulation E. Amplitude modulation
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?
A. 0 percent
B. 36 percent
C. 50 percent
, RCDD TEST QUESTIONS (TOPIC 1 - TOPIC 7)
Questions And Answers Verified by Experts
D. 80 percent
E. 100 percent B. 36 percent
Which of the following correctly lists the lowest frequency band to the highest frequency band?
A. MF, HF, VHF, UHF
B. UHF, VHF, HF, MF
C. HF, MF, UHF, VHF
D. VHF, UHF, MF, HF
E. HF, MF, UHF, VHF A. MF, HF, VHF, UHF
Time division multiplexing (TDM) systems are designed to transport ________ between end
point systems.
A. Only analog signals
B. Only digital signals
C. A mix of both analog and digital signals
D. Both analog and digital signals, but only one type at a time B. Only digital signals
A reasonable approximation for the signal speed in 100 ohm balanced twisted pair cable
is__________, where c is the velocity of light in free space.
A. 0.2 c
B. 0.4 c
C. 0.6 c
