NCTI 2-3: Questions / Verified Solutions
What is the difference between the FTTN and FTTC topologies? Correct
Ans - An FTTC is allowed a smaller number of RF amplifiers between the
optical fiber and the customer premises.
What are the three categories of the fiber-optic cable used to identify the
location of the fiber in the network? Correct Ans - Truck, branch, and
drop
Which type of fiber topology used in a PON places the PON splitters at the
headend while providing one designated fiber for every customer premise?
Correct Ans - Home-run
Which PON element uses patch panels? Correct Ans - ODN
What is the one main function of the FDH? Correct Ans - The FDH
provides effective fiber management by grouping splitters into local serving
areas.
What is the purpose of the MST? Correct Ans - It provides access to
connect fiber-optic cable drops from the customer premises to the network.
What is the purpose of a fiber demarcation box? Correct Ans - It
provides a safe place to splice, split, distribute, store, and cross-connect fiber
optics.
How are optical splitters used in the forward path? Correct Ans - As
passive branching devices that divide an optical signal across multiple output
fibers.
What is the main benefit of deploying WDM technology? Correct Ans -
It will increase the capacity of the existing fiber networks tenfold without
adding any more fiber.
What is unique about WDM-PON? Correct Ans - WDM-PON deployed
in a greenfield system allows each subscriber to get their own designated
wavelength.
,What is the purpose of the SDU? Correct Ans - It provides surge
protection, a test jack, circuit protection, wiring management, and fiber
termination.
What are the advantages of loose buffer tube fiber? Correct Ans - It
offers the best protection for the fibers under high pulling tension and
moisture with its fiber-coated gel.
What is an ONU/ONT? Correct Ans - It is a device that converts light
from fiber to Rf for coaxial distribution into home.
What are the characteristics of ITU-T G.657 BIF? Correct Ans - It is
flexible for installation in small spaces and has a small bend radius of 7.5 mm
or 10mm.
What is true about using a premed fiber-optic pigtail for splicing to patch
panels or terminal equipment? Correct Ans - It is faster and more
reliable than installing connectors in the field.
What is the proper way to handle fiber once it is spliced? Correct Ans -
At the heat-shrink protective sleeve that has a steel bar inside it.
What is the purpose of the ground block? Correct Ans - To protect
fragile electronics like Tvs and STBs from damaging lightning strikes and
power surges.
In a PON FTTx networks, which OSP device contains fiber test points that will
minimize service disruption to customers? Correct Ans - FDH.
What parameter is critical in an OTDR when testing a PON with significant
splitters losses? Correct Ans - High dynamic range.
What is the best approach to repairing an aerial fiber-optic drop cable for
FTTx applications? Correct Ans - Replace the entire section of fiber
drop cable.
(-25) + (42) + (-62) + (20)=? Correct Ans - -25
, (17) X (-19)=? Correct Ans - -323
(-17) - (-34)=? Correct Ans - 17
-49 ÷ -7 =? Correct Ans - 7
(20) ÷ (-4) + (-2) x (-10) - (-2) x (7)=? Correct Ans - 29
3 6/9 + 6 1/3 + 9 5/9=? Correct Ans - 19 5/9
7 3/8 ÷ 7 1/4=? Correct Ans - 1 1/58
8.13 x 0.123 =? Correct Ans - 0.99999
0.5349 ÷ 0.1420 Correct Ans - 3.7669014
67.84 + 81.786 + 4281.98 =? Correct Ans - 4431.606
Which of the statements is true of axioms? Correct Ans - 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=? Correct Ans - E/R
What is the square of 7? Correct Ans - 49
What is the square root of 81? Correct Ans - 9
0.00004=____________x10 to the power of _____________? Correct Ans - 4,-5
(83 X 10^6) + (27 x 10^7)=? Correct Ans - 353x10^6
(480 x 10^-5) ÷ (60 x 10^-3)=? Correct Ans - 8 x 10^-2
(250 x 10^6) -(7 X 10^-5)=? Correct Ans - 180 x 10^-6
(75 x 10^3) + (25 x 10^4)=? Correct Ans - 32.5 x10^4
(10 X 10^3) + (26 x 10^4)=? Correct Ans - 270 x 10^3
What is the difference between the FTTN and FTTC topologies? Correct
Ans - An FTTC is allowed a smaller number of RF amplifiers between the
optical fiber and the customer premises.
What are the three categories of the fiber-optic cable used to identify the
location of the fiber in the network? Correct Ans - Truck, branch, and
drop
Which type of fiber topology used in a PON places the PON splitters at the
headend while providing one designated fiber for every customer premise?
Correct Ans - Home-run
Which PON element uses patch panels? Correct Ans - ODN
What is the one main function of the FDH? Correct Ans - The FDH
provides effective fiber management by grouping splitters into local serving
areas.
What is the purpose of the MST? Correct Ans - It provides access to
connect fiber-optic cable drops from the customer premises to the network.
What is the purpose of a fiber demarcation box? Correct Ans - It
provides a safe place to splice, split, distribute, store, and cross-connect fiber
optics.
How are optical splitters used in the forward path? Correct Ans - As
passive branching devices that divide an optical signal across multiple output
fibers.
What is the main benefit of deploying WDM technology? Correct Ans -
It will increase the capacity of the existing fiber networks tenfold without
adding any more fiber.
What is unique about WDM-PON? Correct Ans - WDM-PON deployed
in a greenfield system allows each subscriber to get their own designated
wavelength.
,What is the purpose of the SDU? Correct Ans - It provides surge
protection, a test jack, circuit protection, wiring management, and fiber
termination.
What are the advantages of loose buffer tube fiber? Correct Ans - It
offers the best protection for the fibers under high pulling tension and
moisture with its fiber-coated gel.
What is an ONU/ONT? Correct Ans - It is a device that converts light
from fiber to Rf for coaxial distribution into home.
What are the characteristics of ITU-T G.657 BIF? Correct Ans - It is
flexible for installation in small spaces and has a small bend radius of 7.5 mm
or 10mm.
What is true about using a premed fiber-optic pigtail for splicing to patch
panels or terminal equipment? Correct Ans - It is faster and more
reliable than installing connectors in the field.
What is the proper way to handle fiber once it is spliced? Correct Ans -
At the heat-shrink protective sleeve that has a steel bar inside it.
What is the purpose of the ground block? Correct Ans - To protect
fragile electronics like Tvs and STBs from damaging lightning strikes and
power surges.
In a PON FTTx networks, which OSP device contains fiber test points that will
minimize service disruption to customers? Correct Ans - FDH.
What parameter is critical in an OTDR when testing a PON with significant
splitters losses? Correct Ans - High dynamic range.
What is the best approach to repairing an aerial fiber-optic drop cable for
FTTx applications? Correct Ans - Replace the entire section of fiber
drop cable.
(-25) + (42) + (-62) + (20)=? Correct Ans - -25
, (17) X (-19)=? Correct Ans - -323
(-17) - (-34)=? Correct Ans - 17
-49 ÷ -7 =? Correct Ans - 7
(20) ÷ (-4) + (-2) x (-10) - (-2) x (7)=? Correct Ans - 29
3 6/9 + 6 1/3 + 9 5/9=? Correct Ans - 19 5/9
7 3/8 ÷ 7 1/4=? Correct Ans - 1 1/58
8.13 x 0.123 =? Correct Ans - 0.99999
0.5349 ÷ 0.1420 Correct Ans - 3.7669014
67.84 + 81.786 + 4281.98 =? Correct Ans - 4431.606
Which of the statements is true of axioms? Correct Ans - 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=? Correct Ans - E/R
What is the square of 7? Correct Ans - 49
What is the square root of 81? Correct Ans - 9
0.00004=____________x10 to the power of _____________? Correct Ans - 4,-5
(83 X 10^6) + (27 x 10^7)=? Correct Ans - 353x10^6
(480 x 10^-5) ÷ (60 x 10^-3)=? Correct Ans - 8 x 10^-2
(250 x 10^6) -(7 X 10^-5)=? Correct Ans - 180 x 10^-6
(75 x 10^3) + (25 x 10^4)=? Correct Ans - 32.5 x10^4
(10 X 10^3) + (26 x 10^4)=? Correct Ans - 270 x 10^3
