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