Review 01

Question 1

Fiber used in endoscope
1) Multimode step index
2) Multimode graded index
3) single mode step index

Answer 1

Multimode step index
(good for short distances)
has large core (up to 100 microns)

Question 1

___ has large core (up to 100 microns)
1) Multimode step index
2) Multimode graded index
3) single mode step index

Answer 1

Multimode step index
(good for short distances)

Question 2

This allows the use of CWDM without chromatic dispersion compensation.

Answer 2

ITU-T G.656 Compliant Low Slope Dispersion Non-zero Dispersion shifted fiber
Chromatic dispersion changes slower with the wavelength so that dispersion compensation is simpler or not needed.

Question 3

_____category fibers are compliant with G.652 category fibers
G.657A
G.657B

Answer 3

G.657A
(.657B fibers are free from all backward compatibility)

Question 4

Best for FTTH
1) G.653
2) G.655
3) G.656
4) G.657

Answer 4

G.657 Bend insensitive

Question 5

________ cable is used by electrical utility companies for communication
1) OPGW: optical ground wire
2) ADSS: All-dielectric self-supporting
3) OPAC: optical attached cable

Answer 5

ADSS: All-dielectric self-supporting
(does not need a messenger to support it)

Question 6

ADSS cable contains metallic elements (T/F)

Answer 6

F
The cable high tensile by aramid yarns and FRP(fibre-reinforced polymer) strength member rod inside

Question 7

In ADSS, optical fibers are
1) supported in loose buffer tubes
2) arranged in a ribbon configuration
3) either 1 or 2
4) none

Answer 7

either 1 or 2
either supported in loose buffer tubes, or arranged in a ribbon configuration

Question 8

ADSS cable can be installed using live-line methods on an energized transmission line.

Answer 8

True
Installation technique is similar to installing overhead conductors

Question 9

Fusion splicing machine with lower SM loss
1) V-grove
2) Core-align

Answer 9

Core-align
(V-grove: 0.05; Core-align:0.02)