Lakshya Education MCQs

Question: Electromechanical voltage regulators are generally used in
Options:
A.Reactors
B.Generators
C.Transformers
D.All of the above
Answer: Option B

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More Questions on This Topic :

Question 1. The presence of ozone due to corona is harmful because it
  1.    Reduces power factor
  2.    Corrodes the material
  3.    Gives odour
  4.    Transfer energy to the ground
Answer: Option B
Question 2. The following system is not generally used
  1.    1-phase 3-wire
  2.    1-phase 4-wire
  3.    3-phase 3-wire
  4.    3-phase 4-wire
Answer: Option A
Question 3. A conductor, due to sag between two supports, takes the form of
  1.    Semicircle
  2.    Triangle
  3.    Ellipse
  4.    Catenary
Answer: Option D
Question 4. Which of the following is the demerit of a 'constant voltage transmission system'?
  1.    Increase of short-circuit current of the system
  2.    Availability of steady voltage at all loads at the line terminals
  3.    Possibility of better protection for the line due to possible use of higher terminal reactants
  4.    Improvement of power factor at times of moderate and heavy loads
Answer: Option A
Question 5. The skin effect of a conductor will reduce as the
  1.    Resistivity of conductor material increases
  2.    Permeability of conductor material increases
  3.    Diameter increases
  4.    Frequency increases
Answer: Option A
Question 6. The spacing between phase conductors of a 220 kV line is approximately equal to
  1.    2 m
  2.    3.5 m
  3.    6 m
  4.    8.5 m
Answer: Option C

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