Electrical Machines Ward-Leonard control is basically a ___________ control method. Field control. Armature voltage control. Field diverter control. Armature resistance control. Field control. Armature voltage control. Field diverter control. Armature resistance control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of higher flux density in the transformer design has no relation with the weight of transformer None of these increases the weigh per KVA reduces the weigh per KVA has no relation with the weight of transformer None of these increases the weigh per KVA reduces the weigh per KVA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 2 .1 Ω 3.1 Ω 1.8 9 Ω 1.79 Ω 2 .1 Ω 3.1 Ω 1.8 9 Ω 1.79 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 1 mg of KOH / gm. 2 mg of KOH / gm. 0.5 mg of KOH / gm. 0.3 mg of KOH / gm. 1 mg of KOH / gm. 2 mg of KOH / gm. 0.5 mg of KOH / gm. 0.3 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a dc machine shunt resistance and armature resistance values are high and low low and low low and high high and high high and low low and low low and high high and high ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer core is made up of a silicon steel laminations which has maximum flux density 1 Tesla. If it was cold rolled grain oriented its flux density increases to 1.6 Tesla. What is the saving in core size or area due to cold rolled grain oriented process? 40% 68% 60% 38% 40% 68% 60% 38% ANSWER DOWNLOAD EXAMIANS APP
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