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. 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. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________. 15 %. 50 %. 25 %. 10 %. 15 %. 50 %. 25 %. 10 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 95% 92% 94% 96% 95% 92% 94% 96% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? (1-K) × input power K × input power both A and B None of these (1-K) × input power K × input power both A and B None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve quick acceleration. high efficiency. low starting torque. reduced size. quick acceleration. high efficiency. low starting torque. reduced size. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Diverters are used only in either of these None of these shunt motors series motors either of these None of these shunt motors series motors ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS