A) slip will reduce B) power factor will be low C) efficiency of motor will improve D) speed will drop. Ans : (B)
A) 1440 rpm B) 1410 rpm C) 1400 rpm. Ans : (A)
A) Faraday’s law B) Fleming’s left hand rule C) Lenz’s law D) Newton’s law of motion. Ans : (C)
A) reduction in slip B) reduction in starting torque C) improvement in efficiency D) improvement in power factor. Ans : (D)
A) to avoid magnetic locking up to the two B) to provide for slip C) to facilitate cooling D) none of the above. Ans : (A)
A) 10% of rated load B) 25% of rated load C) 50% of rated load D) 90% of rated load. Ans : (C)
A) motor is overloaded B) airgap has increased C) bearings need greasing D) there is short circuit in the rotor winding. Ans : (D)
A) rotor is revolving B) motor has airgap C) three phase supply increases reluctance D) high flux densities exist in induction motor. Ans : (B)
A) 320 Nm B) 160 Nm C) 80 Nm D) 40 Nm. Ans : (A)
A) 2.0 V B) 24.75 V C) 14.25 V D) 8.25 V. Ans : (C)