Electrician 3rd sem AC 3 phase Motor

What is the formula to calculate the slip speed (Nslip) of 3 phase squirrel cage induction motor?

Which operation the control circuit is used?

• Remote control

• Inching

• Sequential control

• Forward and reverse

What is the type of control circuit?

• Inching control

• ON remote control

• OFF remote control

• Forward & reverse control

Which formula is used to calculate the total electrical degree in stator of an A.C motor?

• Total electrical degree = 180° / No. of slots

• Total electrical degree = 180° x No. of slots

• Total electrical degree = 180° / No. of poles

• Total electrical degree = 180° x No. of poles

What is the name of the A.C motor starter?

• DOL starter

• Auto transformer starter

• Semi automatic star delta starter

• Fully automatic star delta starter

What is the formula to find synchronous speed of a A.C 3 phase induction motor?

What is the fuse rate to run a 10 HP three phase induction motor at full load?

• 10 A

• 15 A

• 25A

• 30A

What is the name of the contact marked as X?

• Star contact

• Delta contact

• Auxiliary contact

• Over load relay contact

What is the type of A.C motor stator winding?

• Single layer basket winding

• Double layer basket winding

• Involute coil winding

• Diamond coil winding

Which formula is used to calculate percentage slip of an AC 3 phase induction motor?