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Free download in PDF Microwave Engineering Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
HEMT used in the microwave circuit is a
[A]
Low Noise Amplifier
[B]
Detector
[C]
Source
[D]
High Power Amplifier
Answer: Low Noise Amplifier
(2)
Klystron operates on the principle of
[A]
Velocity Modulation
[B]
Pulse Modulation
[C]
Amplitude Modulation
[D]
Frequency Modulation
Answer: Velocity Modulation
(3)
A cavity resonator can be represented by
[A]
an LC circuit
[B]
a lossy capacitor
[C]
a lossy inductor
[D]
an LCR circuit
(4)
Ionospheric preparation is not possible for microwaves because
[A]
Microwave will penetrate through the ionospheric layers
[B]
There will be dispersion of microwave energy
[C]
There will be an abrupt scattering in all directions
[D]
Microwaves will be fully absorbed by the ionospheric layers
Answer: Microwave will penetrate through the ionospheric layers
(5)
fabrication of microstrip line is_____.
[A]
cladding
[B]
printed circuit technique
[C]
oxidation
[D]
None of these
Answer: printed circuit technique
(6)
______ principle does Klystron operates
[A]
Amplitude Modulation
[B]
Pulse Modulation
[C]
Frequency Modulation
[D]
Velocity Modulation
Answer: Velocity Modulation
(7)
____is the most common antenna to the predetermined radiation pattern.
[A]
array antenna
[B]
helical antenna
[C]
sectrol horn
[D]
None of these
(8)
_____ devices use a helix?
[A]
Klystron amplifier
[B]
Klystron oscillator
[C]
TWT
[D]
None of these
(9)
______ is the main advantage of a microwave.
[A]
Highly directive
[B]
High penetration power
[C]
Moves at the speed of light
[D]
None of these
(10)
Reflex klystron is used in_____.
[A]
Oscillator
[B]
mixer
[C]
frequency multiplier
[D]
None of these
(11)
One of the following is used for amplification of microwave energy.
[A]
magnetron
[B]
travelling wave tube
[C]
gunn diode
[D]
None of these
Answer: travelling wave tube
(12)
______is depend on the velocity factor of a transmission line.
[A]
relative permittivity of dielectric
[B]
impedance
[C]
temperature
[D]
None of these
Answer: relative permittivity of dielectric
(13)
one of the bands that come under Microwave Band.
[A]
E
[B]
D
[C]
C
[D]
All the above
(14)
______is not a microwave tube.
[A]
cathode_ray tube
[B]
magnetron
[C]
travelling_wave tube
[D]
None of these
(15)
A Gunn diode is a negative resistance device, which is used as source of microwaves. What is the number of p-n junctions ?
(16)
Which is the dominant mode in rectangular waveguides ?
[A]
TE10
[B]
TM11
[C]
TM01
[D]
TE11
(17)
The main disadvantage of using coaxial cable for microwave signals is its
[A]
High attenuation
[B]
High sensitivity
[C]
Low distortion
[D]
Low selectivity
(18)
Which of the following is a circularly polarized antenna ?
[A]
Helical
[B]
Pyramidal
[C]
Horn
[D]
Dipole
(19)
Which one of the following is a transferred electron device ?
[A]
Gunn DIODE
[B]
TRAPATT diode
[C]
IMPATT diode
[D]
BARITT diode
(20)
A amplifier has a power gain of 200. What is its gain in dB? (log10 2 = 0.30)
[A]
23 dB
[B]
20 dB
[C]
14 dB
[D]
17 dB
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