NCTI - Installer Book Questions and
Answers Already Passed
Which of the following will strengthen signals as they move farther away from the headend
through the trunk express system? ✔✔B) Distribution amplifiers.
Whi
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NCTI - Installer Book Questions and
Answers Already Passed
Which of the following will strengthen signals as they move farther away from the headend
through the trunk express system? ✔✔B) Distribution amplifiers.
Which of the following describes a carrier wave? ✔✔B) A wave with a much higher frequency
than the input signal.
Which of the following describes modulation? ✔✔B) The reshaping of a carrier wave to include
information contained by an input signal.
Which of the following is the symbol for power? ✔✔W = watts
Which of the following describes the process of measuring an analog signal at a specific
interval? ✔✔Sampling
Which of the following is true about the base 10 system? ✔✔B) Digits 0 through 9 are used.
Which of the following best describes post bit-error-rate (BER)? ✔✔A) A measurement of all bit
error after forward error correction has been applied.
Which of the following compression rates will enable six digital programs to be transmitted
rather than one analog channel in a 6 MHz bandwidth? ✔✔6:1
At what modulation error ratio (MER) should a 256-quadrature amplitude modulation (QAM)
signal operate? ✔✔32db or greater
On the return path, signals from many sources must be sent on the same cable. What is the name
of the technique that allows the signals to be sent without losing data integrity? ✔✔B) Time
division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? ✔✔C) Prevents ingress and egress.
Which of the following describes attenuation? ✔✔A reduction in signal strength through a cable
system.
Which of the following is a feature of multimode fiber? ✔✔B) It is easier to handle and
terminate than single-mode fiber.
Which of the following describes the structure of fiber-optic cable? ✔✔B) Drop fiber cables may
use buffer tubes containing steel wire.
Which of the following is true about CAT-1 cabling? ✔✔C) It is typically used in voice
applications.
Which of the following twisted-pair cable types is the only one t
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