# Electrical Engineering Objective Questions { Induction Motors }

337.  If the load on a squirrel-cage induction motor, operating on a constant voltage, constant frequency ac supply is increased, then

338.  A 3-phase 4-pole slip-ring induction motor is supplied with appropriate voltage at 50 Hz to its stator and voltage at 10 Hz to its rotor through slip-rings. The phase sequence of both the voltages is same. The motor will produce steady torque at a sped of

339.  The rotor of a 4-pole 3-phase cage induction motor is replaced by a 3-phase, 4-pole wound rotor. When fed with normal supply, the machine will

340.  Consider the following steps 1CSE 19941 (I) Raversing connections to the terminals of the capacitor (2) Changing the position of the capacitor from auxiliary winding circuit to main winding circuit (3) Reversing supply connection to the main winding (4) Reversing supply connection to the auxiliary circuit While installing a new ceiling fan, if the fan motor is found to be rotating in the wrong direction, then the direction of rotation of the motor can be corrected by

341.  A 3-phase induction motor operates on a variable frequency, variable voltage supply such that V/f is constant. The breakdown torque of the drive will

342.  A 3-phase stator and rotor winding of a slip-ring induction motor is fed by 3-phase ac supply at a frequency f. If the rotor speed is Nr and synchronous speed is Ns, then the absolute speed of resultant flux in space is

343. A 3-phase induction motor draws 1000 kVA at a pf of 0.8 lag. A synchronous condenser is connected in parallel to draw an additional 750 kVA at 0.6 pf lead. The pf of the total load supplied by the mains is

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