NCTI - Installer Book EXAM Questions & Answers
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Terms in this set (151)
Which of the following will B) Distribution amplifiers.
strengthen signals as they
move farther away from
the headend through the
trunk express system?
Which of the following B) A wave with a much higher frequency than the input
describes a carrier wave? signal.
Which of the following B) The reshaping of a carrier wave to include
describes modulation? information contained by an input signal.
Which of the following is W = watts
the symbol for power?
Which of the following Sampling
describes the process of
measuring an analog
signal at a specific
interval?
Which of the following is B) Digits 0 through 9 are used.
true about the base 10
system?
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Which of the following A) A measurement of all bit error after forward error
best describes post bit- correction has been applied.
error-rate (BER)?
Which of the following 6:1
compression rates will
enable six digital
programs to be
transmitted rather than
one analog channel in a 6
MHz bandwidth?
At what modulation error 32db or greater
ratio (MER) should a 256-
quadrature amplitude
modulation (QAM) signal
operate?
On the return path, signals B) Time division multiple access (TDMA).
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?
In a coaxial cable, what is C) Prevents ingress and egress.
the purpose of the
shielding?
Which of the following A reduction in signal strength through a cable system.
describes attenuation?
Which of the following is a B) It is easier to handle and terminate than single-
feature of multimode mode fiber.
fiber?
Which of the following B) Drop fiber cables may use buffer tubes containing
describes the structure of steel wire.
fiber-optic cable?
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Which of the following is C) It is typically used in voice applications.
true about CAT-1 cabling?
Which of the following A) CAT-5.
twisted-pair cable types is
the only one that is
approved by certifying
bodies for data rates in
excess of 10 Mbps?
Which of the following is A) Number of twists.
responsible for reducing
crosstalk in twisted-pair
cable?
Wireless networks use A) The greater the distance between wireless devices,
low-power RF signals; the lower the signal strength and data rate.
therefore, which of the
following is true about
signal strength?
Which of the following is D) The connection between the router and modem is
true about Wi-Fi always wired.
technology?
What percentage does a 1%
cables attenuation
increase or decrease for
every 10° change in
temperature?
Which of the following is a D) Audio surround sound using Dolby Digital
characteristic of high- technology.
definition television
(HDTV)?
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