,COMPREHENSIVE NCTI QUESTIONS AND ANSWERS
GRADED A+
◉ What is one reason why broadband cable operators install fiber-optic
cable in stages instead of changing the infrastructure all at once?
Answer: Changing the infrastructure all at once would cause too many
service disruptions.
◉ What is the difference between the fiber-to-the-node (FTTN) and
fiber-to-the-curb (FTTC) topologies? Answer: An FTTC is allowed a
smaller number of RF amplifiers between the optical fiber and the
customer premises.
◉ Which of these components is used in a passive optical network
(PON)? Answer: Optical splitters.
◉ Which type of star topology used in a passive optical network (PON)
places the PON splitters into fiber access terminal (FAT) located deep in
the network and closer to the customer premises than the centralized
split? Answer: Distributed star.
◉ Which element of a passive optical network (PON) uses a Bragg
grating filter? Answer: Optical line terminal (OLT).
◉ Which element of a passive optical network (PON) uses patch panels?
Answer: Optical distribution network (ODN).
,◉ What is it about radio frequency over glass (RFoG) that made
broadband cable operators envision using it to make a seamless
transition from the legacy hybrid fiber/coax (HFC) architecture over to a
gigabit-capable passive optical network (GPON) or Ethernet passive
optical network (EPON)? Answer: RFoG can operate in parallel with
GPON or EPON, which eliminates the need for any downtime during
the transition.
◉ How are optical splitters used in the forward path? Answer: In the
forward path, optical splitters are used as passive branching devices that
divide an optical signal across multiple output fibers.
◉ Which of the following describes a fiber pigtail? Answer: Fiber-optic
cable with pre-connectorized ends.
◉ Heat shrink tubing is installed over the fusion-splice to strengthen and
protect it. When should the heat shrink be installed on the fiber? Answer:
Before stripping the plastic coating from the fiber.
◉ Which of the following are statements of true axioms? Answer: When
A = C and B = C, then A = B because both are equal to C, which
supports the axiom: Quantities equal to the same quantity are equal to
each other.
◉ Simplify and solve the equation: If E = IR then I = ? Answer: E/R
◉ The square of 7 = Answer: 49
, ◉ The square root of 81 = Answer: 9
◉ 0.00004 = ______ x 10 to the power of ______. Answer: 4, -5
◉ (75 x 10 to the power of 3) + (25 x 10 to the power of 4) = Answer:
32.5 x 10 to the power of 4
◉ 10 to the power of -3 has a metric prefix of ______. Answer: Milli
◉ (480 x 10 to the power of -5) divided by (60 x 10 to the power of -3)
= Answer: 8 x 10 to the power of -2
◉ (250 x 10 to the power of -6) - (7 x 10 to the power of -5) = Answer:
180 x 10 to the power of -6
◉ (75 × 103) + (25 × 104) = Answer: (*Wrong) 100 × 10^3
◉ (-25) + (42) + (-62) + (20) = Answer: -25
◉ (17) x (-19) = Answer: -323
◉ (-17) - (-34) = Answer: 17
GRADED A+
◉ What is one reason why broadband cable operators install fiber-optic
cable in stages instead of changing the infrastructure all at once?
Answer: Changing the infrastructure all at once would cause too many
service disruptions.
◉ What is the difference between the fiber-to-the-node (FTTN) and
fiber-to-the-curb (FTTC) topologies? Answer: An FTTC is allowed a
smaller number of RF amplifiers between the optical fiber and the
customer premises.
◉ Which of these components is used in a passive optical network
(PON)? Answer: Optical splitters.
◉ Which type of star topology used in a passive optical network (PON)
places the PON splitters into fiber access terminal (FAT) located deep in
the network and closer to the customer premises than the centralized
split? Answer: Distributed star.
◉ Which element of a passive optical network (PON) uses a Bragg
grating filter? Answer: Optical line terminal (OLT).
◉ Which element of a passive optical network (PON) uses patch panels?
Answer: Optical distribution network (ODN).
,◉ What is it about radio frequency over glass (RFoG) that made
broadband cable operators envision using it to make a seamless
transition from the legacy hybrid fiber/coax (HFC) architecture over to a
gigabit-capable passive optical network (GPON) or Ethernet passive
optical network (EPON)? Answer: RFoG can operate in parallel with
GPON or EPON, which eliminates the need for any downtime during
the transition.
◉ How are optical splitters used in the forward path? Answer: In the
forward path, optical splitters are used as passive branching devices that
divide an optical signal across multiple output fibers.
◉ Which of the following describes a fiber pigtail? Answer: Fiber-optic
cable with pre-connectorized ends.
◉ Heat shrink tubing is installed over the fusion-splice to strengthen and
protect it. When should the heat shrink be installed on the fiber? Answer:
Before stripping the plastic coating from the fiber.
◉ Which of the following are statements of true axioms? Answer: When
A = C and B = C, then A = B because both are equal to C, which
supports the axiom: Quantities equal to the same quantity are equal to
each other.
◉ Simplify and solve the equation: If E = IR then I = ? Answer: E/R
◉ The square of 7 = Answer: 49
, ◉ The square root of 81 = Answer: 9
◉ 0.00004 = ______ x 10 to the power of ______. Answer: 4, -5
◉ (75 x 10 to the power of 3) + (25 x 10 to the power of 4) = Answer:
32.5 x 10 to the power of 4
◉ 10 to the power of -3 has a metric prefix of ______. Answer: Milli
◉ (480 x 10 to the power of -5) divided by (60 x 10 to the power of -3)
= Answer: 8 x 10 to the power of -2
◉ (250 x 10 to the power of -6) - (7 x 10 to the power of -5) = Answer:
180 x 10 to the power of -6
◉ (75 × 103) + (25 × 104) = Answer: (*Wrong) 100 × 10^3
◉ (-25) + (42) + (-62) + (20) = Answer: -25
◉ (17) x (-19) = Answer: -323
◉ (-17) - (-34) = Answer: 17
