FIBER OPTIC COMMUNICATIONS-1 Exam Questions Correct Answers Current Update (A Pass)
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Course
FIBER OPTIC
Institution
FIBER OPTIC
FIBER OPTIC COMMUNICATIONS-1 Exam Questions Correct Answers Current Update (A Pass)
Refraction is the
A. bending of light waves
B. reflection of light waves
C. distortion of light waves
D. diffusion of light waves - Answers -A
Losses in optical fibers can be caused by (indicate false st...
FIBER OPTIC COMMUNICATIONS-1 Exam
Questions Correct Answers Current Update
(A Pass)
Refraction is the
A. bending of light waves
B. reflection of light waves
C. distortion of light waves
D. diffusion of light waves - Answers -A
Losses in optical fibers can be caused by (indicate false statement)
A. impurities
B. microbending
C. attenuation in the glass
D. stepped index operation - Answers -D
Single mode step index has a core diameter in the range of
A. 100 to 1000 micrometer
B. 50 to 100 micrometer
C. 2 to 15 micrometer
D. 5 to 20 micrometer - Answers -C
The operation of a fiber optic cable is based on the principle of
A. refraction
B. reflection
C dispersion
D. absorption - Answers -B
Which of the following refers to the bandwidth of optical fiber?
A. 1 Hz to 30,000 Hz
B. 1KHz to 300 KHz
C. 1 MHz to 300 MHz
D. 1 MHz to 500 MHz - Answers -D
Too much overfeed whilst splicing will cause
A. waisting
B. a bubble being formed due to air being trapped inside the fiber
C. a bulge in the fiber
,D. runback - Answers -A
The speed of light in plastic compared to the speed of light in air is
A. less
B. more
C. the same
D. zero - Answers -A
In ________ propagation, the core is varying densities
A. multimode step index
B. multimode graded index
C. multimode single index
D. single mode - Answers -B
The loss in single mode fiber optic cable due to a connector is about
A. 0.02 dB
B. 0.2 dB
C. 1 dB
D. 3 dB - Answers -B
In _______ propagation, the beam of propagated light is almost horizontal, and the low
density core has a small diameter compared to the cores of the other propagation
modes
A. multimode step index
B. multiple graded index
C. multimode single index
D. single mode - Answers -D
Which cable length has the highest attenuation
A. 1 km
B. 2 km
C. 85 ft
D. 500 ft - Answers -B
This determines the maximum data rate capability of the detector
A. responsivity
B. dark current
C. response speed
D. spectral response - Answers -C
, Fibers are single mode at a particular wavelength only when V<2.405. Under what
condition, if any, will the fiber cease to be single mode?
A. when the wavelength of the light is greater than the cutoff wavelength
B. when the wavelength of the light is less than the cutoff wavelength
C. when the core diameter is extremely small
D. b and c - Answers -B
As light is couple in a multipoint reflective device, the power is reduced by
A. 1.5 dB
B. 0.1 dB
C. 0.5 dB
D. 0.001 dB - Answers -C
One of the following is referred to as a major component of an optical time domain
reflector
A. pulse generator and vertical plate
B. laser and horizontal plate
C. pulse generator laser
D. vertical and horizontal plate - Answers -C
A function of an optic isolator
A. cancels reflected waves
B. amplifies signal transmitted
C. filters unnecessary signals
D. all of these - Answers -A
The term power budgeting refers to
A. the cost of cables, connectors, equipment and installation
B. the loss of power due to defective components
C. the total power available minus the attenuation losses
D. the comparative costs of fiber and copper installations - Answers -C
Which of the following is the fastest light sensor
A. PIN diode
B. photovoltaic diode
C. phototransistor
D. avalanche photodiode - Answers -D
________ is the propagation method subject to the greatest distortion
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