Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part3 : 16 to 20
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.The shape of the torque/slip curve of induction motor is |
| parabola |
| hyperbola |
| rectangular parabola |
| straigth line |
17.If a 3-phase supply is given to the stator and rotor is short circuited rotor will move |
| in the opposite direction as the direction of the rotating field |
| in the same direction as the direction of the field |
| in any direction depending upon phase squence of supply |
| in the same direction as the direction of the field |
18.A pump induction motor is switched on to a supply 30% lower than its rated voltage. The pump runs. What will eventually happen ? It will |
| stall after sometime |
| stall immediately |
| continue to run at lower speed without damage |
| get heated and subsequently get damaged |
19.The complete circle diagram of induetion motor can be drawn with the help of data found from |
| noload test |
| blocked rotor test |
| stator resistance test |
| all of the above |
20.The speed characteristics of an induction motor closely resemble the speedload characteristics of which of the following machines |
| D.C. series motor |
| D.C. shunt motor |
| universal motor |
| none of the above |
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