a) (2.9×10³ ɭ)/I^1.4
b) (2.9×10⁴ ɭ)/I^1.4
c) (2.9×10⁴ ɭ)/I²
d) (2.9×10⁴ ɭ)/I

Ans: (a)

a) Interception alone
b) Interception, conduction and dissipation
c) Interception and conduction
d) Conduction and dissipation

Ans: (b)

a) Differential protection
b) Cross-differential protection
c) Negative sequence protection
d) All of these

Ans: (a)

a) 1 to 2 cycles
b) 3 to 5 cycles
c) 2 to 3 cycles
d) 5 to 7 cycles

Ans: (a)

a) Its operation does not depend upon the direction of power flow
b) Correct relay action can be obtained by using series capacitors on the line
c) It can operate even for low value of fault current
d) None of these

Ans: (c)

a) 10%
b) 25%
c) 41.6%
d) None of above

Ans: (c)

a) Earth fault current can be used to operate relays
b) “Arcing ground” phenomenon is avoided
c) It provides symmetry to the line impedances
d) Both (a) and (b)above

Ans: (c)

a) Low operating cost
b) Free from pollution problems
c) No fuel transportation problems
d) All of the above.

Ans: (d)

a) Transmission lines
b) Alternators
c) Switch gears
d) Transformers

Ans: (d)

a) Sodium as moderator and graphite as coolant
b) Sodium as coolant and graphite as moderator
c) A mixture of sodium and graphite as coolant
d) A mixture of sodium and graphite as moderator.

Ans: (b)

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