NCTI - Installer Book Exam Questions
& Answers18
To show respect and concern for your customer's property during a security installation -
ANSWERS-D) Do not place tools on furniture where they might scratch the wood or soil the
upholstery.
If you know you are going to be late to a customer's home for a security installation, -
ANSWERS-D) Have your dispatcher notify the customer and reschedule if necessary.
If a customer indicates indecision about installing a home security system - ANSWERS-B) Review
the system the customer selected to ensure that it is capable of meeting all their needs.
In the case of major damage to the customer premises during a home security installation, -
ANSWERS-C) Call your supervisor immediately, and remain on the premises until a company
representative arrives.
Each time you install a component in a new or existing home security system, you should -
ANSWERS-C) Verify each element of the security system is reporting back to the control panel.
Motion detectors work best when - ANSWERS-A) An intruder walks past it as opposed to
walking toward it.
An active infrared motion detector works - ANSWERS-B) By sending out bursts of ultrasonic
sound waves, after which the sensor waits for the energy to be reflected back.
Smoke detectors should be used to sound the alarm before heat detectors activate because -
ANSWERS-A) Many fires begin with billowing smoke before intense heat builds up.
,The smoke detector that responds more rapidly in cases of high flames is - ANSWERS-C) The
ionization smoke detector.
Which of the following will strengthen signals as they move farther away from the headend
through the trunk express system? - ANSWERS-B) Distribution amplifiers.
Which of the following describes a carrier wave? - ANSWERS-B) A wave with a much higher
frequency than the input signal.
Which of the following describes modulation? - ANSWERS-B) The reshaping of a carrier wave to
include information contained by an input signal.
Which of the following is the symbol for power? - ANSWERS-W = watts
Which of the following describes the process of measuring an analog signal at a specific
interval? - ANSWERS-Sampling
Which of the following is true about the base 10 system? - ANSWERS-B) Digits 0 through 9 are
used.
Which of the following best describes post bit-error-rate (BER)? - ANSWERS-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? - ANSWERS-6:1
At what modulation error ratio (MER) should a 256-quadrature amplitude modulation (QAM)
signal operate? - ANSWERS-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? -
ANSWERS-B) Time division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? - ANSWERS-C) Prevents ingress and
egress.
Which of the following describes attenuation? - ANSWERS-A reduction in signal strength
through a cable system.
Which of the following is a feature of multimode fiber? - ANSWERS-B) It is easier to handle and
terminate than single-mode fiber.
Which of the following describes the structure of fiber-optic cable? - ANSWERS-B) Drop fiber
cables may use buffer tubes containing steel wire.
Which of the following is true about CAT-1 cabling? - ANSWERS-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? - ANSWERS-A) CAT-5.
Which of the following is responsible for reducing crosstalk in twisted-pair cable? - ANSWERS-A)
Number of twists.
Wireless networks use low-power RF signals; therefore, which of the following is true about
signal strength? - ANSWERS-A) The greater the distance between wireless devices, the lower the
signal strength and data rate.
& Answers18
To show respect and concern for your customer's property during a security installation -
ANSWERS-D) Do not place tools on furniture where they might scratch the wood or soil the
upholstery.
If you know you are going to be late to a customer's home for a security installation, -
ANSWERS-D) Have your dispatcher notify the customer and reschedule if necessary.
If a customer indicates indecision about installing a home security system - ANSWERS-B) Review
the system the customer selected to ensure that it is capable of meeting all their needs.
In the case of major damage to the customer premises during a home security installation, -
ANSWERS-C) Call your supervisor immediately, and remain on the premises until a company
representative arrives.
Each time you install a component in a new or existing home security system, you should -
ANSWERS-C) Verify each element of the security system is reporting back to the control panel.
Motion detectors work best when - ANSWERS-A) An intruder walks past it as opposed to
walking toward it.
An active infrared motion detector works - ANSWERS-B) By sending out bursts of ultrasonic
sound waves, after which the sensor waits for the energy to be reflected back.
Smoke detectors should be used to sound the alarm before heat detectors activate because -
ANSWERS-A) Many fires begin with billowing smoke before intense heat builds up.
,The smoke detector that responds more rapidly in cases of high flames is - ANSWERS-C) The
ionization smoke detector.
Which of the following will strengthen signals as they move farther away from the headend
through the trunk express system? - ANSWERS-B) Distribution amplifiers.
Which of the following describes a carrier wave? - ANSWERS-B) A wave with a much higher
frequency than the input signal.
Which of the following describes modulation? - ANSWERS-B) The reshaping of a carrier wave to
include information contained by an input signal.
Which of the following is the symbol for power? - ANSWERS-W = watts
Which of the following describes the process of measuring an analog signal at a specific
interval? - ANSWERS-Sampling
Which of the following is true about the base 10 system? - ANSWERS-B) Digits 0 through 9 are
used.
Which of the following best describes post bit-error-rate (BER)? - ANSWERS-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? - ANSWERS-6:1
At what modulation error ratio (MER) should a 256-quadrature amplitude modulation (QAM)
signal operate? - ANSWERS-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? -
ANSWERS-B) Time division multiple access (TDMA).
In a coaxial cable, what is the purpose of the shielding? - ANSWERS-C) Prevents ingress and
egress.
Which of the following describes attenuation? - ANSWERS-A reduction in signal strength
through a cable system.
Which of the following is a feature of multimode fiber? - ANSWERS-B) It is easier to handle and
terminate than single-mode fiber.
Which of the following describes the structure of fiber-optic cable? - ANSWERS-B) Drop fiber
cables may use buffer tubes containing steel wire.
Which of the following is true about CAT-1 cabling? - ANSWERS-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? - ANSWERS-A) CAT-5.
Which of the following is responsible for reducing crosstalk in twisted-pair cable? - ANSWERS-A)
Number of twists.
Wireless networks use low-power RF signals; therefore, which of the following is true about
signal strength? - ANSWERS-A) The greater the distance between wireless devices, the lower the
signal strength and data rate.
