ENGINEERING CAREER AND STUDY MATERIALS

Electrical Engineering Questions with Answer published on 06/05/2019  $1. In a transformer the voltage regulation will be zero when it operates at (A) unity p.f. (B) leading p.f. (C) lagging p.f. (D) zero p.f. leading. Ans: B $2. An induction meter can handle current upto (a) 10 A (b) 30 A (c) 60 A (d) 100 A Ans: d $3. The maximum power in a synchronous machine is obtained when the load angle is (A) 0° (B) 85° (C) 120° (D) 135°. Answer: (B) 85° $4 In a 3-phase synchronous motor  (A) the speed of stator MMF is always more than that of rotor MMF.  (B) the speed of stator MMF is always less than that of rotor MMF.  (C) the speed of stator MMF is synchronous speed while that of rotor MMF is zero.  (D) rotor and stator MMF are stationary with respect to each other.  Ans: D $5. The switch board instruments (a) should be mounted in vertical position (6) should be mounted in horizontal position (c) either (a) or (b) (d) ne...