Download DBATU B.Tech 2019 March 4th Semester Electrical Machines And Instruments Question Paper

DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE RAIGAD-402 103

Mid Semester Examination - March - 2019

Branch: B.Tech (Electronics & Telecommunication)

Subject: Electrical machines and instruments

Sem.: IV

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Date:- 11/03/2019

Time:- 1 Hr.

Subject Code:- BTESC401

Marks: 20

Instructions:- Assume data if required

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1. Q.No.1 State True or false (Marks) (06)
   1. Induction motor needs supply to rotate
   2. Dc shunt motor is constant speed motor
   3. Synchronous motors are not self starting motors
   4. Step angle calculations based on Ns & NR
   5. Squirrel cage motors are rugged motors

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   6. Four point starter supports speed control methods
2. Q.No. 2 Solve any two of the following: (3x2)
   1. What are the types of DC motors
   2. What do understand the slip of induction motors
   3. What are applications of stepper motors

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3. Q.No.3 Solve any one of the following (8)
   1. Derive an expression for EMF generated by DC generator.
   2. How does the induction motor works by means of its components.

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