NCTI - Installer
Book 100%
SOLUTIONS REVISED
2023//2024
Which of the following will strengthen signals as they move farther away from the
headend through the trunk express system? - ANSWER Fiber Nodes
Which of the following describes a carrier wave? - ANSWER B) A wave with a much
higher...
NCTI - Installer
Book 100%
SOLUTIONS REVISED
2023//2024
Which of the following will strengthen signals as they move farther away from the
headend through the trunk express system? - ANSWER Fiber Nodes
Which of the following describes a carrier wave? - ANSWER B) A wave with a much
higher frequency than the input signal.
Which of the following describes modulation? - ANSWER B) The reshaping of a carrier
wave to include information contained by an input signal.
Which of the following is the symbol for power? - ANSWER W = watts
Which of the following describes the process of measuring an analog signal at a specific
interval? - ANSWER Sampling
Which of the following is true about the base 10 system? - ANSWER B) Digits 0
through 9 are used.
Which of the following best describes post bit-error-rate (BER)? - ANSWER 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? - ANSWER 6:1
, At what modulation error ratio (MER) should a 256-quadrature amplitude modulation
(QAM) signal operate? - ANSWER 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? - ANSWER B) Time division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? - ANSWER C) Prevents
ingress and egress.
Which of the following describes attenuation? - ANSWER A reduction in signal strength
through a cable system.
Which of the following is a feature of multimode fiber? - ANSWER B) It is easier to
handle and terminate than single-mode fiber.
Which of the following describes the structure of fiber-optic cable? - ANSWER B) Drop
fiber cables may use buffer tubes containing steel wire.
Which of the following is true about CAT-1 cabling? - ANSWER C) It is typically used in
voice applications.
Which of the following twisted-pair cable types is the only one that is approved by
certifying bodies for data rates in excess of 10 Mbps? - ANSWER A) CAT-5.
Which of the following is responsible for reducing crosstalk in twisted-pair cable? -
ANSWER A) Number of twists.
Wireless networks use low-power RF signals; therefore, which of the following is true
about signal strength? - ANSWER A) The greater the distance between wireless
devices, the lower the signal strength and data rate.
Which of the following is true about Wi-Fi technology? - ANSWER D) The connection
between the router and modem is always wired.
What percentage does a cables attenuation increase or decrease for every 10° change
in temperature? - ANSWER 1%
Which of the following is a characteristic of high-definition television (HDTV)? -
ANSWER D) Audio surround sound using Dolby Digital technology.
Which type of screen display has been known to use a great deal of energy, can have a
short lifespan, but has high-contrast, vibrantly accurate color images? - ANSWER
plasma
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