Electrical Machines Direct-on-line (DOL) starters are not suitable for starting large DC motors, because the motor may not start. the motor may run away. the starting current will be enormously high. the starting torque becomes low. the motor may not start. the motor may run away. the starting current will be enormously high. the starting torque becomes low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 2/√5 1/√5 1/3 1/√2 2/√5 1/√5 1/3 1/√2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is zero All of these minimum maximum zero All of these minimum maximum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Any of the above. Open slot type machines. Closed slot type machines. Semi closed slot type machine. Any of the above. Open slot type machines. Closed slot type machines. Semi closed slot type machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Equalizer rings are used in which of the followings? lap winding both 1 and 2 wave winding None of these lap winding both 1 and 2 wave winding None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is to suppress harmonic and unbalance in voltage. to interconnect three voltage systems. None of these to carry extra load. to suppress harmonic and unbalance in voltage. to interconnect three voltage systems. None of these to carry extra load. ANSWER DOWNLOAD EXAMIANS APP
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