Q.1
Gigabit Ethernet is defined by the IEEE _____ standard.
  • 802.11
  • 802.3z
  • 802.3g
  • 802.3a
Q.2
The fiber optic receiver performs which of the following functions?
  • Amplifies the optical signal
  • Amplifies the electrical signal
  • Converts the electrical signal back into an optical signal
  • Converts the optical signal back into an electrical signal
Q.3
Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
  • equal
  • double
  • half
Q.4
A fiber optic adapter also called _________________ is designed to connect two fiber optic cables together.
  • Couplers
  • Copper Adapters
  • Cable Joins
  • Cable Ties
Q.5
Step index multi mode fiber has
  • core diameter has 50 to 200 µm
  • core diameter has 100 to 200 µm
  • core diameter has 50 to 100 µm
  • core diameter has 50 to 150 µm
Q.6
What are the types of optical fiber?
  • Material
  • Number of modes
  • Refractive index profile
  • All the above
Q.7
Example for passive sensor
  • Displacement sensor
  • Temperature sensor
  • Pressure sensor
  • None
Q.8
Single mode fiber is
  • one mode
  • two mode
  • more than one mode
  • none
Q.9
A light wave acting as a carrier wave is capable of carrying
  • less information
  • more information
  • medium information
  • No information
Q.10
Physical parameters are sensed directly is
  • Active sensor
  • Intrinsic sensor
  • Passive sensor
  • Both 1 and 2
Q.11
The basic structure of an optical fiber consists of which three parts?
  • Core
  • Buffer
  • Cladding
  • All of above
Q.12
In an optical system light OFF is a “and light ON is a “0”.
  • True
  • False
Q.13
LED transmitters operate at wavelengths of 850nm and 1300nm.
  • True
  • False
Q.14
A Laser differs from ordinary light in three distinct ways. Its coherent, directional and monochromatic.
  • True
  • False
Q.15
Of the following advantages, which one does NOT apply to fiber optics?
  • Lower signal attenuation
  • Increased bandwidth
  • Common ground required
  • Reduced size and weight
Q.16
Who demonstrated the concept of “Total Internal Reflection?”
  • Kapany
  • Tyndall
  • Chappe
  • Wheeler
Q.17
Who developed the first optical telegraph?
  • Kapany
  • Tyndall
  • Chappe
  • Wheeler
Q.18
What are the two types of optical detectors?
  • LEDs and APDs
  • PIN photodiodes and APDs
  • APDs and laser diodes
  • Laser diodes and PIN photodiodes
Q.19
Fiber optic systems use what three types of optical sources?
  • PIN diodes, LASERs and LEDs
  • LEDs, LASERs and VCSELs
  • LEDs and LASERs and diodes
  • LASERs, diodes and APDs
Q.20
What transmitter uses stimulated emission?
  • LED
  • LASER
  • VCSEL
  • APD
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