AU R2004 EE1251 Electrical Machines-II May June 2014 Question Paper

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Question Paper Code : 53424 

B.E / B.Tech. DEGREE EXAMINATION, MAY/JUNE 2014. 

Fourth Semester 

Electrical and Electronics Engineering 

EE 1251/ EE 1254 ELECTRICAL MACHINES - II 

(Regulation 2004/2007) 

(Common to B.E. (Part-Time) Third Semester Electrical and Electronics Engineering Regulation 2005) 

Time : Three hours 
Maximum 100 marks 
Answer ALL questions. 
PART A —(10 x 2 20 marks) 
1.Why is an alternator with low value of Short Circuit Ratio has lower limit of stability? 
2.What is the necessity for short chording the armature-winding of synchronous machines? 
3.What will happen when the load on the synchronous. motor changed? 
4.Why does synchronous motor always run at synchronous speed? 
5.What is locked rotor torque? 
6.Why are slots on the rotor of induction motor skewed. 
7.Write down the methods for starting induction motor. 
8.Define slip power in induction motor. 
9.What are the conditions for parallel operation of an alternator? 
10.What is the relation between frequency of stator current and rotor current of an Induction. motor? 

Full Name :Arumugam.P
College Name :SNS College Of Technology
Department :EEE
Semester :04
Subject Code :EE1251
Subject Name :Electrical Machines-II
Study Material Description :QP

Attachment :

  EM-II MJ2014 QP.pdf (Size: 1.72 MB / Downloads: 166)

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