1) If one line conductor of a 3-phase line is cut, the load is then supplied by: A) Single phase B) Two phase C) Three phase D) Five phase Ans:- A 2) In order to measure power in a 3-phase, 4-wire unbalance load , the minimum number of wattmeters required would be: A) 1 B) 2 C) 3 D) 4 Ans:- C 3) In a star connected system , the relation between the line voltage VL and Phase voltage Vph is: A) VL = Vph B) VL = Square root of 3*Vph C) VL = Vph/Square root of 3 D) Zero Ans:-B 4) Three 50-ohm resistors are connected in star across 400 V, 3-Phase supply. If one of the resistors is disconnected, then line current will be: A) 4 A B) 8*Square root of (3) A C) 8 A D) 8/Square root of (13) A Ans:- A 5) DC supply is essential for the operation of : A) Arc lamp B) Mercury vapour lamp C) Sodium vapour lamp D) Fluorescent lamp Ans:- A 6) The motor generator set can be used for conversions of electrical power in various forms. Which of the following given below is applicable to a mot...