Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 0.5 mg of KOH / gm. 0.3 mg of KOH / gm. 2 mg of KOH / gm. 1 mg of KOH / gm. 0.5 mg of KOH / gm. 0.3 mg of KOH / gm. 2 mg of KOH / gm. 1 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 16.55 Nm 15.6 Nm Zero 15.28 Nm 16.55 Nm 15.6 Nm Zero 15.28 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which transformer, the tertiary winding is used? Star - star Delta - delta Delta - star Star - delta Star - star Delta - delta Delta - star Star - delta ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum starting torque is obtained, rotor power is ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I/2 and P/4 V, I and P V, I/2 and P/2 V/2, I and P/2 V/2, I/2 and P/4 V, I and P V, I/2 and P/2 V/2, I and P/2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ? ωe = 2*ωm ωe = ωm ωe = 4*ωm ωe = 1/2*ωm ωe = 2*ωm ωe = ωm ωe = 4*ωm ωe = 1/2*ωm ANSWER DOWNLOAD EXAMIANS APP
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