- In …………….. transmission system are widely used in the backbone of the network.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
2. State the following statements are True or False for the applications of optical fiber cables.
i) Optical fiber is now used in telephone systems.
ii) The installation cost of optical fibers is higher than that for the Co-axial cables.
iii) They are used for analog telephone networks.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False
3. The sources of light for optical fiber communication …………….. provides an unfocused light which hits the core boundaries and gets discussed.
A) ILD
B) LED
C) LOD
D) ELD
4. In optical fiber communication, the ………………. can provide a very focused beam that can be used for long-distance communication.
A) ILD
B) LED
C) LOD
D) ELD
5. Which of the following statements are True for step-index and graded-index fibers.
i) The light rays travel in straight lines through the step-index fibers.
ii) The acceptance cone of graded-index fibers is smaller than that of the step-index fiber.
iii) In graded-index fiber, the light rays do not travel in a straight line due to continuous refraction.
A) i and ii only
B) i and iii only
C) ii and iii only
A) All i, ii and iii
6. State True or False for the following statements about single-mode and multi-mode fibers.
i) Multi-mode fiber can have either a step-index or a graded-index profile.
ii) Single-mode fiber is a high-quality fiber for wideband long haul transmission.
iii) The amount of dispersion introduced in single-mode fiber is greater than that introduced in the multi-mode fibers.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False
7. ………… cable has much lower attenuation and can carry the signal to longer distances without using amplifiers and repeaters in between.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
8. ………………. cable is not affected by EMI effects and can be used in areas where high voltage are passing by.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
9. State whether the following statements are True for the characteristics of optical fiber cables.
i) The cost of fiber optic cable is more compared to twisted pair and Co-axial.
ii) The installation of fiber optic cables is easier.
iii) The number of modes that a fiber optic can support does not depend on its length.
A) i and ii only
B) i and iii only
C) ii and iii only
A) All i, ii and iii
10. ……………….. cable is not affected by potential shifts in the electrical ground, nor does it produce sparks.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
11. Which of the following are the advantages of fiber optic communication over the conventional means of communication?
i) Small size and lightweight ii) Easy availability and low cost iii) No electrical or electromagnetic interference iv) Large bandwidth
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv
12. Which of the following are the drawbacks of optical fiber?
i) Ground loops are absent ii) The initial cost incurred in high iii) Joining the optical fiber is a difficult job
A) i and ii only
B) i and iii only
C) ii and iii only
A) All i, ii and iii
13. Fiber optic cables use three types of connectors which are
i) SC connector ii) BC connector iii) ST connector iv) LT-RJ connector v) MT-RJ connector
A) i, iii and v only
B) iii, iv an v only
C) i, iii and v only
D) ii, iii and iv only
14. The ……………. is used for cable TV, which uses a push/pull locking system.
A) SC connector
B) BC connector
C) ST connector
D) MT-RJ connector
15. The ……………. connector is used for connecting a cable to networking devices, which uses a bayonet locking system.
A) SC connector
B) BC connector
C) ST connector
D) MT-RJ connector
16. In …………… short circuit between the two conductors is not possible.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
17. In …………….. power loss occurs due to absorption, scattering, dispersion and bending.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
18. In …………….. EMI is reduced due to shielding.
A) Optical fiber cable
B) Co-axial cable
C) UTP cable
D) STP cable
19. In Co-axial cable, the node capacity per segment is ………..
A) 4o to 110
B) 30 to 90
C) 30 to 100
D) 40 to 100
20. …………… is less affected due to the external magnetic field.
A) Optical fiber cable
B) Co-axial cable
C) UTP cable
D) STP cable
Answers
1. A) Fiber optic
2. D) i-True, ii-True, iii-False
3. B) LED
4. A) ILD
5. B) i and iii only
6. D) i-True, ii-True, iii-False
7. A) Optical fiber
8. A) Fiber optic
9. B) i and iii only
10. A) Fiber optic
11. D) All i, ii, iii and iv
12. C) ii and iii only
13. C) i, iii and v only
14. A) SC connector
15. C) ST connector
16. A) Optical fiber
17. A) Optical fiber
18. B) Co-axial cable
19. C) 30 to 100
20. B) Co-axial cable
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