a) (2.9×103 ɭ)/I1.4 b) (2.9×104 ɭ)/I1.4 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)
 Multiple Choice Question (MCQ) of Electronics page-17:241. Which of the following statement is true? a) The saturation voltage VCF of silicon transistor is more than germanium transistor. b) The saturation voltage VCE for germanium transistor is more than silicon transistor. c) The saturation voltage VCE for silicon transistor is same as that for germanium. d) The saturation voltage VCE for silicon transistor is lower than germanium transistor. |
Multiple Choice Question (MCQ) of Electronics page-16:226. Which of the following statement is correct? a) Inner electrons are always present in the semiconductor. b) Bound electrons are always present in the semiconductor. c) Free electrons are always present in the semiconductor. d) Inner and bound electrons are always present in the semiconductor. |
Multiple Choice Question (MCQ) of Electronics page-15:211. The materials whose electrical conductivity is usually less than 1 × 106 mho/m are a) Semiconductors b) Conductors c) Insulators d) Alloys |
Multiple Choice Question (MCQ) of Electronics page-14:196. In which of the following device the base resistors are not added in the package but added externally? a) UJT b) CUJT c) PUT d) None of the above |
Multiple Choice Question (MCQ) of Electronics page-13:181. The conduction in JEFT is always by the a) Majority carriers b) Minority carriers c) Holes d) Electrons e) Holes and electrons simultaneously |