1. A shunt generator delivers 450 A at 230 V and the resistance of the shunt field and armature are 50 Ω and 0.03 Ω respectively. Calculate the generated e.m.f? Solution: The Generator Circuit is as shown in the figure, 2. A four pole generator having wave-wound armature winding has 51 slots, each slot containing 20 conductors. What will be the voltage generated in … [Read more...] about 5 DC Generator Problems with Solution – Part 1
Objective Questions
Multiple Choice Questions (MCQs) on Synchronous Motors
1. A synchronous motor can operate at (A) Lagging power factor only (B) Leading power factor only (C) Unity power factor only (D) Lagging, leading and unity power factor only 2. An unexcited single-phase synchronous motor is (A) reluctance motor (B) repulsion motor (C) universal motor (D) AC series motor. 3. The maximum power developed in the synchronous motor … [Read more...] about Multiple Choice Questions (MCQs) on Synchronous Motors
Circuit Breakers – Objective Questions – Part 1
Part 1Part 2Part 3Part 4Part 5 1. A circuit breaker is (A) power factor correcting device (B) a device to neutralize the effect of transients (C) a waveform correcting device (D) a current interrupting device. Get Answer D 2. The function of protective relay in a circuit breaker is (A) to each any stray voltages (B) to close the contacts when the … [Read more...] about Circuit Breakers – Objective Questions – Part 1
Objective Questions on Single Phase Motors | Part 4
46. The short coming of repulsion motor is (A) variation of speed with load (B) low power factor (C) tendency to spark at brushes (D) all of the above. Check Answer D 47. The disadvantage of shaded pole motor is (A) low starting torque' (B) low efficiency (C) very little over load capacity (D) all of the above. Check Answer D 48. The … [Read more...] about Objective Questions on Single Phase Motors | Part 4
Objective Questions on Alternators | Part 2
16. A winding is having a number of slots is equal to the number of poles, then this winding is called (A) concentrated winding. (B) short pitch winding. (C) full pitch winding. (D) distributed winding. Check Answer A 17. Symmetrical waveform does not have (A) capacitance. (B) odd harmonics. (C) both even and odd harmonics. (D) even … [Read more...] about Objective Questions on Alternators | Part 2