NCTI Final Exam Study Guide 2025: Practice Questions & Prep for Cable & Telecommunications

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NCTI FINAL EXAM: PROGRESSION FIELD TECH 2- 3

TEST EXAM| LATEST UPDATE 2025| Verified Answers

What uses the 2.4-GHz band and runs at 54 Mbps?

.....ANSWER.....802.11g

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.

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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.

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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

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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