Micro-wave Tubes MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Micro-wave Tubes”.

1. Microwave tubes are power sources themselves at higher frequencies and can be used independently without any other devices.
a) True
b) False

2. Microwave tubes are grouped into two categories depending on the type of:
a) Electron beam field interaction
b) Amplification method
c) Power gain achieved
d) Construction methods
d) None of the mentioned

3. The production of power at higher frequencies is much simpler than production of power at low frequencies.
a) True
b) False

4. The klystron tube used in a klystron amplifier is a _________ type beam amplifier.
a) Linear beam
b) Crossed field
c) Parallel field
d) None of the mentioned

5. ________ is a single cavity klystron tube that operates as on oscillator by using a reflector electrode after the cavity.
a) Backward wave oscillator
b) Reflex klystron
c) Travelling wave tube
d) Magnetrons

6. In a _________ oscillator, the RF wave travels along the helix from the collector towards the electron gun.
a) Interaction oscillator
b) Backward wave oscillator
c) Magnetrons
d) None o the mentioned

7. In crossed field tubes, the electron beam traverses the length of the tube and is parallel to the electric field.
a) True
b) False

8. A major disadvantage of klystron amplifier is:
a) Low power gain
b) Low bandwidth
c) High source power
d) Design complexity

9. Extended interaction oscillator is a ________ beam oscillator that is similar to klystron.
a) Linear beam
b) Crossed beam
c) Parallel beam
d) M beam

10. Klystron amplifiers have high noise output as compared to crossed field amplifiers.
a) True
b) False

11. Magnetrons are microwave devices that offer very high efficiencies of about 80%.
a) True
b) False

12. ____________ is a microwave device in which the frequency of operation is determined by the biasing field strength.
a) VTM
b) Gyratron
c) Helix BWO
d) None of the mentioned

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