Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 8: 352. The luminous efficiency of a sodium vapour lamp is ............ lumens per watt. (a) 40-50 (b) 50-100 (c) 120-200 (d) 10-12 Answer :…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 7: 302. Sky appears blue due to (a) radiation. (b) reflection. (c) refraction. (d) scattering of light over dust particles. Answer : (d) scattering of…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 6: 252. The atomic hydrogen welding is based on the principle(s) of (a) obtaining atomic hydrogen by means of an electric arc be­tween two tungsten…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 5: 202. In resistance welding, the magnitude of current is controlled (a) by varying the primary voltage of the welding transformer using an auto-transformer between…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 4: 152. For arc heating, the electrodes used are made of (a) copper. (b) graphite. (c) tungsten. (d) aluminium. Answer : (b) graphite. 153. In…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 3: 102. The most suitable motor for a steel mill requiring a motor having high starting torque, wide speed range and precise speed control is…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 2:  52. The pair used for frequency converters is (a) squirrel cage induction motor and synchronous motor. (b) slip-ring induction motor and synchronous motor. (c)…

Electrical Power Engineering Multiple Choice Questions and Answers (MCQs) Part 1: 1. The basic elements of an electric drive are : (a) electric motor and the transmission system. (b) electric motor, the transmission and control…