# Microwave Measurements MCQ

## Microwave Measurements MCQ

Microwave Measurements MCQ, Multiple Choice Questions on Microwave Measurements, Objective Questions on Microwave Measurements, Engineering MCQ, Microwave Engineering Engineering MCQ,

### Multiple Choice Questions

Q.1. The microwave bench in the lab is designed to work in the band ________

• X band
• L band
• S band
• C band

Q.2. The mode used in the laboratory bench is ________

• dominant mode
• degenerate mode
• any one of the above two
• none

Q.3. The cutoff wavelength of the bench is ________

• 2a
• 2b
• cf
• none

Q.4. The method used to measure high VSWR is ________

• slotted-line method
• Double minimum method
• both
• none

Q.5. Low VSWR method can be used to measure VSWR up to ________

• ten
• five
• three
• none

Q.6. The range of VSWR in dB indicated in the VSWR meter is ________

• 0–2 dB
• 0–10 dB
• 0–5 dB
• 0–100 dB

Q.7. The temperature coefficient of the Thermistor is ________

• positive
• negative
• zero
• none

Q.8. Barretters have ________

• positive temp efficient of resistance
• negative temp coefficient of resistance
• both
• none

Answer: positive temp efficient of resistance

Q.9. The impedance of the line to the left of voltage minimum is ________

• inductive
• capacitive
• high resistance
• low resistance

Q.10. The impedance of the line to the right of voltage minimum is ________

• inductive
• capacitive
• high resistance
• low resistance

Q.11. The bolometer that has a negative temperature coefficient of resistivity is called

• barretter
• varistor
• thermistors
• calorimeter

Q.12. For impedance measurement, the following oscillator is used:

• Reflex klystron tube oscillator
• Gunn oscillator
• both
• either reflex klystron or Gunn oscillator

Answer: either reflex klystron or Gunn oscillator

Q.13. The “Double Minimum” method is relevant to the measurement of

• low attenuation coefficient
• high attenuation coefficient
• high VSWR
• low VSWR

Q.14. A 75-ohm transmission line is first terminated and the minima locations are noted. When the short is replaced by a resistive load RL, the minima locations are not altered and the VSWR is measured to be 3. What is the value of RL?

• 25 ohms
• 50 ohms
• 225 ohms
• 250 ohms