Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Basic Electrical Engineering MCQs Part 11 Two identical heater coils are connected in parallel across mains. If one of coil breaks the other Two identical heater coils are connected in parallel across mains. If one of coil breaks the other: Develops lower temperature Develops higher temperature Develops same temperature as before None of these Correct … Read more
Transformer MCQs Part 18 An iron-core transformer that is working at maximum flux density of 0.9 Wb/m^2 is replaced by silicon steel working at a maximum flux density of 1.2 Wb/m^2. If total flux is to remain unchanged, the reduction volume expressed as percentage of original volume (keeping the voltage and frequency per turn same) … Read more
Induction Motor MCQs Part 13 The starting torque of a 3-phase induction motor is related to supply voltage as follows The starting torque of a 3-phase induction motor is related to supply voltage as follows Starting torque is independent of supply voltage Startining torque is directly proportional supply voltage Starting torque is directly proportional to … Read more
Induction Motor MCQs Part 12 The value of full-load slip of a 3-phase induction motor ranges from The value of full-load slip of a 3-phase induction motor ranges from 2% to 5% 10% to 20% 20% to 30% 90% to 100% Correct answer: 1. 2% to 5% In 3 phase induction motor, for higher efficient, … Read more
Transformer MCQs Part 17 Assuming a maximum flux density of 1.3 Wb/m^2 and induced voltage per turn of 40 V, the core area required for 1600 kVA, 5500/220 V, 60 Hz single phase core type power transformer is: Assuming a maximum flux density of 1.3 Wb/m^2 and induced voltage per turn of 40 V, the … Read more
Transformer MCQs Part 16 At full-load certain transformer has 400 W iron loss. The iron loss at half-full load will have value At full-load certain transformer has 400 W iron loss. The iron loss at half-full load will have value: 50 W 100 W 200 W 400 W Correct answer: 4. 400 W Explanation: Iron … Read more
Transformer MCQs Part 15 If Zs and Zp are secondary and primary load impedances of a step-up transformer, then which of following is correct If Zs and Zp are secondary and primary load impedances of a step-up transformer, then which of following is correct: Zp < Zs Zp > Zs Zp = Zs Insufficient data … Read more
Switchgear and Protection MCQs Part 6 During short circuit test on circuit breaker following readings were obtained as single frequency transient During short circuit test on circuit breaker following readings were obtained as single frequency transient: Time to reach peak restriking voltage = 60 µsec Peak restriking voltage = 120 kV The average RRRV is … Read more
Switchgear and Protection MCQs Part 5 Which of the following device detects fault in power system Which of the following device detects fault in power system Relay Circuit breaker Isolator None of these Correct answer: 1. Relay A circuit breaker is rated as 1800 A, 1000 MVA, 33 kV, 3 second, 3 phase oil circuit … Read more
Switchgear and Protection MCQs Part 4 A fuse performs A fuse performs Detection function only Interruption function only Both of these None of these Correct answer: 3. Both of these When oil circuit breaker operates under fault conditions, 1 cm³ of oil forms about When oil circuit breaker operates under fault conditions, 1 cm³ of … Read more