• 1. 
    In an E plane tee the signal leaving the second and the third port will be equal in magnitude and similar in phase with respect to the input signal

  • True
  • False
  • 2. 
    Open ended waveguide in which one end is flared

  • Directional coupler
  • Waveguide Tee
  • Waveguide Horn Antenna
  • All of above
  • 3. 
    Porcelain is produced by firing at high temperature of which all mixtures?

  • Kaolin
  • Feldspar
  • Quartz
  • All of these.
  • 4. 
    Water tubes in vertical boiler are __________

  • horizontal
  • vertical
  • inclined
  • none
  • 5. 
    The waveguide tee in which the axis of the side arm is shunting the E field of the main waveguide

  • E plane Tee
  • H plane Tee
  • 6. 
    Attenuation in fixed attenuators are achieved by:

  • capacitive films within the waveguide
  • using crystal diode
  • using resistive films within the waveguide
  • None of these
  • 7. 
    The hollow metallic tube that conducts EM Waves

  • Klystron Mount
  • Waveguide
  • 8. 
    PIN modulator is used along with Gunn oscillator to improve:

  • Voltage
  • Modulation
  • 9. 
    Choose the microwave components that have a provision to detect the propagating EM signal

  • Slotted Line Section
  • Tunable Probe
  • Waveguide Detector Mount
  • All of above
  • 10. 
    Intial cost of thermal power plant is __________ than nuclear power plant

  • Higher
  • lower
  • more
  • none
  • 11. 
    Which of the following statements hold good for directional coupler

  • A portion of the power travelling from Port 2 to Port 1 is coupled to Port 3 but not to Port 4
  • A portion of the power travelling from Port 2 to Port 1 is coupled to Port 4 but not to Port 3
  • A portion of the power incident on Port 3 is coupled to Port 1 but not to Port 2
  • All of above
  • 12. 
    A economizer in a boiler

  • Increases steam pressure
  • Increases steam flow
  • Decreases steam pressure
  • Decreases fuel consumption
  • 13. 
    There is no restriction in the number of ports for circulators

  • True
  • False
  • 14. 
    Where is the suspension type of insulators mainly used?

  • RCC poles
  • Wooden poles.
  • Steel poles.
  • Steel towers
  • 15. 
    Tunable probe is used for

  • Tuning the frequency of the EM Wave within the waveguide
  • Impedance matching
  • Exploring the EM wave within the waveguide
  • None of these
  • 16. 
    Solid fuel used in ______________ power plants

  • Thermal
  • Hydro
  • Diesel
  • gas turbine power plant
  • 17. 
    Waveguide Tee that is employed in balanced mixers

  • E plane Tee
  • H plane Tee
  • Magic Tee
  • None of these
  • 18. 
    What is the maximum voltage level upto which the pin type insulators can be used?

  • 22 kV
  • 33 kV
  • 66 kV
  • 132 kV
  • 19. 
    The voltage across the various discs of a string of suspension insulator having identical discs is different due to

  • Surface leakage currents.
  • Series capacitance
  • Shunt capacitance to ground
  • Series and shunt capacitance.
  • 20. 
    The microwave device used to rotate the plane of polarization of the waveguide transmission line

  • Phase Shifter
  • Tee
  • Twist
  • None of these
  • 21. 
    The number of discs in a string of insulators for 400 kV ac over head transmission line lies in the range of

  • 32 – 33
  • 22 – 23
  • 15 – 16
  • 9 – 10
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