NCTI - INSTALLER QUESTIONS AND ANSWERS
Which of the following will strengthen signals as they move farther away from the
headend through the trunk express system? - Answer -B) Distribution amplifiers.
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 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
Which TV digital format was originally designed for progressive scan DVDs? - Answer -
EDTV
Which type of television display has a deeper cabinet, which affects the size of the
screen? - Answer -rear projector
Which device enables customers to schedule recordings of television programs? -
Answer -B) Digital video recorder (DVR). dvr
The cable modem termination system (CMTS) is one of the two main components of
DOCSIS architecture. What is the other? - Answer -B) Cable modem.
Which of the following is the CableLabs-led project built to define the architecture for the
delivery of real-time Internet protocol (IP) applications? - Answer -C) PacketCable.
A cable gateway typically includes a cable modem, multiple quadrature amplitude
modulation (QAM) tuners, a telephone interface, and a multiport and wireless router.
What is the function of the multiple quadrature amplitude modulation (QAM) tuners? -
Answer -C) Convert legacy DTV services being transported on QAM carriers to an IP
format that can be received by IP devices.
What is the function of the central processing unit (CPU) in a computer, laptop, or
tablet? - Answer -A) It controls input, processing, storage, and output functions.
Which operating system is used exclusively on a Mac computer? - Answer -OS X
What is the best thing to do if you are wearing a hard hat in windy conditions? - Answer
-C) Put the chin strap on.
When is the best time to wear rubber insulated safety gloves? - Answer -D) When there
is a possibility of coming in contact with electrical voltages.
Which of the following is the proper placement for an extension ladder? - Answer -B) 3
feet above roofline surface if moving from the ladder onto the roof.
Which of the following will strengthen signals as they move farther away from the
headend through the trunk express system? - Answer -B) Distribution amplifiers.
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 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
Which TV digital format was originally designed for progressive scan DVDs? - Answer -
EDTV
Which type of television display has a deeper cabinet, which affects the size of the
screen? - Answer -rear projector
Which device enables customers to schedule recordings of television programs? -
Answer -B) Digital video recorder (DVR). dvr
The cable modem termination system (CMTS) is one of the two main components of
DOCSIS architecture. What is the other? - Answer -B) Cable modem.
Which of the following is the CableLabs-led project built to define the architecture for the
delivery of real-time Internet protocol (IP) applications? - Answer -C) PacketCable.
A cable gateway typically includes a cable modem, multiple quadrature amplitude
modulation (QAM) tuners, a telephone interface, and a multiport and wireless router.
What is the function of the multiple quadrature amplitude modulation (QAM) tuners? -
Answer -C) Convert legacy DTV services being transported on QAM carriers to an IP
format that can be received by IP devices.
What is the function of the central processing unit (CPU) in a computer, laptop, or
tablet? - Answer -A) It controls input, processing, storage, and output functions.
Which operating system is used exclusively on a Mac computer? - Answer -OS X
What is the best thing to do if you are wearing a hard hat in windy conditions? - Answer
-C) Put the chin strap on.
When is the best time to wear rubber insulated safety gloves? - Answer -D) When there
is a possibility of coming in contact with electrical voltages.
Which of the following is the proper placement for an extension ladder? - Answer -B) 3
feet above roofline surface if moving from the ladder onto the roof.
