12) Which loss of 3 phase induction motor is determined by blocked rotor test

Copper loss

Friction loss

Hysteresis loss

Eddy current loss

Answer is:

Copper loss

To dry the varnish quickly in winding

To easy flow of varnish in the winding

To increase the insulation resistance value

To drive out the moisture in between winding layers

Answer is:

Ground test

Polarity test

Continuity test

Short circuit test

Answer is:

Tong Tester

Internal Growler

External Growler

Digital multimeter

Answer is:

Protect from heavy load

Protect against high voltage

Allow for continuous over loading

Protect against dead short circuit

Answer is:

Explanation:

Thermal cutout in addition to fuse in A.C motor circuit is used to allow for continuous overloading.