Q.1
A multiplexing technique which does not involve the application of several message signals onto a single fiber is called as
  • time division multiplexing
  • frequency division multiplexing
  • code division multiplexing
  • space division multiplexing
Q.2
In                  the optical channel bandwidth is divided into non-overlapping frequency bands.
  • time division multiplexing
  • frequency division multiplexing
  • code division multiplexing
  • de-multiplexing
Q.3
How many encoding schemes are used in optical fiber communication system design requirements?
  • three
  • one
  • two
  • four
Q.4
A regenerative repeater is called as
  • repetitive repeater
  • regenerator
  • attenuator
  • gyrator
Q.5
The                        incorporates a line receiver in order to convert the optical signal into the electrical regime.
  • attenuator
  • transmitter
  • repeater
  • designator
Q.6
limits the maximum distance between the optical fiber transmitter and receiver.
  • attenuation
  • transmission
  • equipment
  • fiber length
Q.7
is the unique property of the glass fiber.
  • transmission
  • opaque property
  • ductile
  • malleable
Q.8
Mean splice insertion losses of 0.dB are obtained using multimode graded index fibers with the Springroove splice.
  • true
  • false
Q.9
is caused by surface tension effects between the two fiber ends during fusing.
  • pre-fusion
  • diffusion
  • self-alignment
  • splicing
Q.10
The rounding of the fiber ends with a low energy discharge before pressing the fibers together and fusing with a stronger arc is called as
  • pre-fusion
  • diffusion
  • crystallization
  • alignment
Q.11
Which of the following is not used as a flame heating source in fusion splicing?
  • microprocessor torches
  • ox hydric burners
  • electric arc
  • gas burner
Q.12
The heating of the two prepared fiber ends to their fusing point with the application of required axial pressure between the two optical fibers is called as
  • mechanical splicing
  • fusion splicing
  • melting
  • diffusion
Q.13
In score and break process, which of the following is not used as a cutting tool?
  • diamond
  • sapphire
  • tungsten carbide
  • copper
Q.14
What is the main requirement with the fibers that are intended for splicing?
  • smooth and oval end faces
  • smooth and square end faces
  • rough edge faces
  • large core diameter
Q.15
The insertion losses of the fiber splices are much less than the Fresnel reflection loss at a butted fiber joint.
  • true
  • false
Q.16
A permanent joint formed between two different optical fibers in the field is known as a
  • fiber splice
  • fiber connector
  • fiber attenuator
  • fiber dispersion
Q.17
2 dB along with a splice loss of 0.1 dB at the interconnection of each stage. Determine the excess loss.
  • 1.9 db
  • 1.4 db
  • 0.9 db
  • 1.1 db
Q.18
A                            coupler comprises a number of cascaded stages, each incorporating three or four-port FBT couplers to obtain a multiport output.
  • star
  • ladder
  • wdm
  • three-port
Q.19
How many manufacturing methods are used for producing multimode fiber star couplers?
  • two
  • one
  • three
  • five
Q.20
Couplers insertion loss is same as that of excess loss.
  • true
  • false
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