Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Surge impedance of a lossless transmission line is given by: √LC √(L/C) 1/√LC 1/√(L/C) Correct answer: 2. √(L/C) Explanation: Also Read: 5 Types of Conductors used in transmission lines 3 Different Types of Transmission Lines on the Basis of Length Electrical power transmission MCQs More Electrical Engineering MCQs
Causes of Low power factor are: Arc lamp loads Induction motors Presence of harmonic currents All of above Correct answer: 4. All of above Explanation: More Electrical Engineering MCQs You might be interested in: Power Distribution MCQs Power Generation MCQs Power System Protection MCQs Synchronous Generator MCQs Synchronous motor MCQs Transformer MCQs
The voltage regulation of a transformer is negative when load power factor is Unity Lagging Leading Zero Correct answer: 3. Leading Explanation:
Demand factor is mathematically defined as: Average load/Maximum load Connected load/Maximum demand Average load x Maximum load Maximum demand/Connected load Correct answer: 4. Maximum demand/Connected load See complete formula for Demand Factor with solved example here. Also see 13 Most Important Formulas on Variable Loads Every Power Engineer Should Know Electrical Power Generation MCQs
Synchronous Generator MCQs Part 13 More Electrical Engineering MCQs An under-excited alternator supplies which type of power An under-excited alternator supplies which type of power: Lagging VAR Leading VAR No reactive power None of the above Correct answer: 2. Leading VAR More MCQs on Synchronous Generator The angular velocity of two-pole alternator running at 2000 … Read more
Synchronous Generators MCQs Part 12 For the same power rating, as compared to DC Generator an alternator is For the same power rating, as compared to DC Generator an alternator is: Smaller in size Larger in size Of the same size None of the above Correct answer: 1. Smaller in size The non-salient pole field … Read more
Synchronous Generator MCQs Part 11 The AC armature winding of an alternator is connected in which configuration The AC armature winding of an alternator is connected in which configuration: It is always star-connected It is usually delta-connected Star-delta connected None of these Correct answer: 1. It is always star-connected WRT alternator which of following is … Read more
Synchronous Generator MCQs Part 10 An alternator is sometimes also called as An alternator is sometimes also called as: Asynchronous generator Synchronous generator Rosenberg generator None of the above Correct answer: 2. Synchronous generator In order to generate 50 cycles per second the speed at which a 6-pole alternator should be driven is In order … Read more
Synchronous Generator MCQs Part 9 When the speed of alternator is reduced by half, the generated EMF will become When the speed of alternator is reduced by half, the generated EMF will become One-fourth Half Twice Four times Correct answer: 2. Half The primary reason for placing field winding on the rotor in an alternator … Read more
Synchronous Generator MCQs Part 8 The AC armature winding of an alternator operates at _____________ the field winding The AC armature winding of an alternator operates at _____________ the field winding Much lesser voltage than Much higher voltage than Same voltage as None of the above Correct answer: 2. Much higher voltage than Turbo-alternators have … Read more