Electrical Machines For very sensitive and wide speed control, the preferable control method is Armature control. Field control. Ward-Leonard control. Multiple voltage control. Armature control. Field control. Ward-Leonard control. Multiple voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 8 Ω. 10 Ω. 4 Ω. 2 Ω. 8 Ω. 10 Ω. 4 Ω. 2 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 100 KVA transformer is operating at 60 Hz, 240 V supply. The same transformer is operating at 50 Hz, 200 V supply. The new rating is 100 KVA 123.3 KVA 83.33 KVA 50 KVA 100 KVA 123.3 KVA 83.33 KVA 50 KVA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be 238.2 V. 240 V. 256.4 V. 271.7 V. 238.2 V. 240 V. 256.4 V. 271.7 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is demagnetising. crossmagnetising. none of above. magnetising. demagnetising. crossmagnetising. none of above. magnetising. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is reversed. increased. modified. none of these. reversed. increased. modified. none of these. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS