Es&t018
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GaAs stands for:
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Gallium arsenide
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Gallium assembly
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Gallium astenite
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None of the above
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This QUIZ is made or by product of my continuous research & study about Electronics Engineering to help the Electronics Engineer/Technician Aspirants in passing the Board Examinations.
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- 2.
RADAR stands for:
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Radio ranging
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Radio depth and ranging
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Radio detection and ranging
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Remote detection and ranging
Correct Answer
A. Radio detection and ranging -
- 3.
The characteristic impedance of a waveguide:
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Is fixed
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Depends on the frequency it carries
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Depends on the longer dimension of its cross section
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Both b and c
Correct Answer
A. Both b and c -
- 4.
Directional couplers for waveguides are characterized by:
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Their insertion loss
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Their coupling specification
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Their directivity
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All of the above
Correct Answer
A. All of the above -
- 5.
RADAR uses:
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Pulsed transmission
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Continuous transmission
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The Doppler effect
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All of the above
Correct Answer
A. All of the above -
- 6.
IMPATT stands for:
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Impact avalanche and transit time
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Induced mobility at transmission time
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Implied power at transmission terminal
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None of the above
Correct Answer
A. Impact avalanche and transit time -
- 7.
A resonant cavity is a type of:
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Tuned circuit
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Defect in a waveguide
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Antenna
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None of the above
Correct Answer
A. Tuned circuit -
- 8.
The device commonly used in microwave ovens is the:
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TWT
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Klystron
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Magnetron
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YIG
Correct Answer
A. Magnetron -
- 9.
Circular waveguides use TM 01 mode because:
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It is dominant
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Of its circular symmetry
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It is the only mode possible
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It is more efficient
Correct Answer
A. Of its circular symmetry -
- 10.
Striplines and microstrips are used to:
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Couple sections of waveguide
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Couple waveguides to antennas
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Couple components on a circuit board
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None of the above
Correct Answer
A. Couple components on a circuit board -
- 11.
Power can be coupled into or out of a waveguide:
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With a magnetic field probe
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With an electric field probe
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Through a hole in the waveguide
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All of the above
Correct Answer
A. All of the above -
- 12.
The dominant mode of a waveguide depends on:
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The shape of the waveguide
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The power level of the signal
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The point of signal injection
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None of the above
Correct Answer
A. The shape of the waveguide -
- 13.
The microwave frequency range is considered to start at:
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100 MHz
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1 GHz
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10 GHz
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100 GHz
Correct Answer
A. 1 GHz -
- 14.
A TEE connector used with waveguides is:
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An H-plane TEE
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An E-plane TEE
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A "magic" TEE
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All of the above
Correct Answer
A. All of the above -
- 15.
The dominant mode of a circular waveguide is:
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TE 01
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TM 01
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TE 11
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TM11
Correct Answer
A. TE 11 -
- 16.
The device commonly used in UHF transmitters is the:
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TWT
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Klystron
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Magnetron
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YIG
Correct Answer
A. Klystron -
- 17.
The device commonly used in satellite communications is the:
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TWT
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Klystron
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Magnetron
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YIG
Correct Answer
A. TWT -
- 18.
The UHF range is:
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Below the microwave range
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Inside the microwave range
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Above the microwave range
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Same as the microwave range
Correct Answer
A. Below the microwave range -
- 19.
A YIG can be tuned by applying:
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An electric field
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A magnetic field
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Mechanical pressure
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An "exciter" signal
Correct Answer
A. A magnetic field -
- 20.
The maximum effective range for pulsed radar:
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Increases with increasing repetition rate
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Decreases with increasing repetition rate
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Decreases with increasing pulse period
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None of the above
Correct Answer
A. Decreases with increasing repetition rate -
- 21.
YIG stands for:
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Yttrium-Iron-Gallium
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Yttrium-Iron-Germanium
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Yttrium-Iron-Garnet
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None of the above
Correct Answer
A. Yttrium-Iron-Garnet -
- 22.
The dominant mode of a rectangular waveguide is:
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TE01
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TM01
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TE10
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TM10
Correct Answer
A. TE10 -
- 23.
The minimum effective range for pulsed radar:
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Increases with increasing pulse duration
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Decreases with increasing pulse duration
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Is always a tenth of the maximum range
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None of the above
Correct Answer
A. Increases with increasing pulse duration -
- 24.
TWT stands for:
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Transverse Wave Transmission
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Transverse-Wave Tube
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Traveling-Wave Tube
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Traveling-Wave Transmission
Correct Answer
A. Traveling-Wave Tube -
- 25.
An "isolator" is a device that:
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Isolates frequencies in a waveguide
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Allows a signal to pass in one direction only
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Separates signals among various ports
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Prevents microwaves from leaking out of a waveguide
Correct Answer
A. Allows a signal to pass in one direction only -
- 26.
A microwave phased array is often made using:
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Slots
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Yagis
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Fresnel lenses
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All of the above
Correct Answer
A. Slots -
- 27.
A "circulator" is a device that:
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Rotates signal polarity in a waveguide
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Allows a signal to pass in one direction only
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Separates signals among various ports
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Prevents microwaves from being "trapped" in a waveguide
Correct Answer
A. Separates signals among various ports -
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May 17, 2017Quiz Edited by
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Jul 04, 2012Quiz Created by
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