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Electrical Engineering Mcqs

SCRs are used in series to meet_______________?

  • (A)  high current demand
  • (B)  low voltage demand
  • (C)  low current demand
  • (D)  high voltage demand
Submitted By :Ali Uppal


Which following is a two terminal three layer device?

  • (A)  BJT
  • (B)  Power dioed
  • (C)  MOSFET
  • (D)  None of above
Submitted By :Ali Uppal


ON state voltage drop across SCR lie between the range_____________?

  • (A)  0 – 0.5 V.
  • (B)  0.5 – 1 V.
  • (C)  1 – 1.5 V.
  • (D)  1.5 – 2 V.
Submitted By :Ali Uppal


In ac – dc conversion, when the switch is closed then the sum of voltages around the loop is____________?

  • (A)  Zero
  • (B)  Non zero
  • (C)  Equal to the sum of voltage when switch is open
  • (D)  Twice of the voltage when switch is open
Submitted By :Ali Uppal


If a shunt motor is started with its field winding open then?

  • (A)  It will rotate at the same speed as that with its field winding closed
  • (B)  It will rotate at less speed as that with its field winding closed
  • (C)  It will rotate at dangerously high speed
  • (D)  None of these
Submitted By :Ali Uppal


A rectifier with an external low pass filter is an example of______________?

  • (A)  Indirect switch matrix circuits
  • (B)  Direct switch matrix circuits
  • (C)  Embedded converters
  • (D)  All of these
Submitted By :Ali Uppal


What is the advantage of HRC fuses over Rewirable fuses?

  • (A)  High speed operation
  • (B)  High rupturing capacity
  • (C)  No ageing effect
  • (D)  All of the above
Submitted By :Ali Uppal


The power demand can be estimated approximately by___________?

  • (A)  Load survey method
  • (B)  Mathematical method
  • (C)  Statistical method
  • (D)  Economic parameters
Submitted By :Ali Uppal


Submitted By :Ali Uppal


Unipolar modulation is generally used in____________?

  • (A)  AC – AC converters
  • (B)  AC – DC converters
  • (C)  DC – AC converters
  • (D)  DC – DC converters
Submitted By :Ali Uppal