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ELECTRICAL MACHINES

Electrical Machines
If the handle of a three point starter goes to back to OFF position, it may be due to

 all of these.
 high filed circuit resistance.
 zero or very low voltage supply.
 over load.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will

 get damaged.
 start automatically without trouble.
 develop very low starting torque.
 not start automatically.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC Motor 3 point starter is used to

 limit the starting current to a safer value.
 provide overload protection.
 all of above.
 provide protection against Low-Voltage.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If starter is not used with large DC motor for starting, it will

 damage the armature and commutator.
 provide execessive voltage drop in line.
 draw a starting current many times its rated full load current.
 all of above.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Direct-on-line (DOL) starters are not suitable for starting large DC motors, because

 the starting torque becomes low.
 the motor may not start.
 the starting current will be enormously high.
 the motor may run away.

ANSWER DOWNLOAD EXAMIANS APP
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