141. The starting current of a 3 ( ) induction motor is 5 times the rated current, while the rated slip is 4%. This ratio of starting torque to ull-load torque is
- 0.06
- 0.8
- 1.0
- 1.2
142. A squirrel cage induction motor having a rated slip of 2% on full load has a starting torque of 50% of full-load torque. This starting current is
- Two times the full-load current
- Four times the full-load current
- Five times the full-load current
- Equal to the full-load current
143. With DOL start of an induction motor the heating during acceleration of inertia load is proportional to
- Slip at maximum torque
- Maximum torque
- Stored kinetic energy
- Electromagnetic power developed on the rotor
144. Which of the following starting methods cannot be used for starting star-connected as well as delta-connected 3-phase induction motor?
- Direct-on- line
- Star-delta
- Auto-transformer
- Line resistance