NCTI - Installer Book Exam Questions And
Answers
Which of the following will strengthen signals as they move farther
away from the headend through the trunk express system? -
correct answer ✅B) Distribution amplifiers.
Which of the following describes a carrier wave? -
correct answer ✅B) A wave with a much higher frequency than
the input signal.
Which of the following describes modulation? -
correct 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? -
correct answer ✅W = watts
Which of the following describes the process of measuring an
analog signal at a specific interval? -
correct answer ✅Sampling
Which of the following is true about the base 10 system? -
correct answer ✅B) Digits 0 through 9 are used.
,NCTI - Installer Book Exam Questions And
Answers
Which of the following best describes post bit-error-rate (BER)? -
correct 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? -
correct answer ✅6:1
At what modulation error ratio (MER) should a 256-quadrature
amplitude modulation (QAM) signal operate? -
correct 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? -
correct answer ✅B) Time division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? -
correct answer ✅C) Prevents ingress and egress.
,NCTI - Installer Book Exam Questions And
Answers
Which of the following describes attenuation? -
correct answer ✅A reduction in signal strength through a cable
system.
Which of the following is a feature of multimode fiber? -
correct answer ✅B) It is easier to handle and terminate than
single-mode fiber.
Which of the following describes the structure of fiber-optic cable?
-
correct answer ✅B) Drop fiber cables may use buffer tubes
containing steel wire.
Which of the following is true about CAT-1 cabling? -
correct 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? -
correct answer ✅A) CAT-5.
, NCTI - Installer Book Exam Questions And
Answers
Which of the following is responsible for reducing crosstalk in
twisted-pair cable? -
correct answer ✅A) Number of twists.
Wireless networks use low-power RF signals; therefore, which of
the following is true about signal strength? -
correct 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? -
correct 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? -
correct answer ✅1%
Which of the following is a characteristic of high-definition
television (HDTV)? -
correct answer ✅D) Audio surround sound using Dolby Digital
technology.
Answers
Which of the following will strengthen signals as they move farther
away from the headend through the trunk express system? -
correct answer ✅B) Distribution amplifiers.
Which of the following describes a carrier wave? -
correct answer ✅B) A wave with a much higher frequency than
the input signal.
Which of the following describes modulation? -
correct 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? -
correct answer ✅W = watts
Which of the following describes the process of measuring an
analog signal at a specific interval? -
correct answer ✅Sampling
Which of the following is true about the base 10 system? -
correct answer ✅B) Digits 0 through 9 are used.
,NCTI - Installer Book Exam Questions And
Answers
Which of the following best describes post bit-error-rate (BER)? -
correct 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? -
correct answer ✅6:1
At what modulation error ratio (MER) should a 256-quadrature
amplitude modulation (QAM) signal operate? -
correct 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? -
correct answer ✅B) Time division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? -
correct answer ✅C) Prevents ingress and egress.
,NCTI - Installer Book Exam Questions And
Answers
Which of the following describes attenuation? -
correct answer ✅A reduction in signal strength through a cable
system.
Which of the following is a feature of multimode fiber? -
correct answer ✅B) It is easier to handle and terminate than
single-mode fiber.
Which of the following describes the structure of fiber-optic cable?
-
correct answer ✅B) Drop fiber cables may use buffer tubes
containing steel wire.
Which of the following is true about CAT-1 cabling? -
correct 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? -
correct answer ✅A) CAT-5.
, NCTI - Installer Book Exam Questions And
Answers
Which of the following is responsible for reducing crosstalk in
twisted-pair cable? -
correct answer ✅A) Number of twists.
Wireless networks use low-power RF signals; therefore, which of
the following is true about signal strength? -
correct 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? -
correct 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? -
correct answer ✅1%
Which of the following is a characteristic of high-definition
television (HDTV)? -
correct answer ✅D) Audio surround sound using Dolby Digital
technology.
