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 the machine … [Read more...] about 5 DC Generator Problems with Solution – Part 1
Objective Questions
Multiple Choice Questions (MCQs) on Alternator
1. In an alternator, voltage drops occurs in (A) Armature resistance only (B) Armature resistance and leakage reactance (C) Armature resistance, leakage reactance and armature reaction (D) Armature resistance, leakage reactance, armature reaction and earth connections2. The magnitude of various voltage drops that occur in an alternator, … [Read more...] about Multiple Choice Questions (MCQs) on Alternator
Multiple Choice Questions (MCQs) on Synchronous Motors
1. 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 … [Read more...] about Multiple Choice Questions (MCQs) on Synchronous Motors
Circuit Breakers – Objective Questions – Part 1
Part 1Part 2Part 3Part 4Part 51. 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 actuating quantity reaches a … [Read more...] about Circuit Breakers – Objective Questions – Part 1
Objective Questions on Single Phase Motors | Part 4
Part 1Part 2Part 3Part 4Part 546. 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 D47. 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 D48. The efficiency of shaded … [Read more...] about Objective Questions on Single Phase Motors | Part 4