Why DC series is suited for traction applications? U CO5 May 2015 Define Torque. R CO1 May 2010 What is the precaution to be taken during starting of a DC series motor? U CO1 Nov 2010 Why? What is back emf in DC motor? What is its significance? R CO1 Nov 2011 Explain why Swinburne’s test cannot be performed on DC series motor. U CO1 Nov 2011 List various method of starting DC motor. R CO1 Nov 2016 What is meant by dynamic breaking in DC motor? R CO1 Nov 2016 State the advantages of Swinburne's test. R CO1 In every DC motor, a generator action occurs. Justify Ev CO3 How to reverse the direction of rotation of a DC motor? U CO1 the applications of various DC motors R CO5 At what load does the efficiency is maximum in DC shunt machines? U CO3 How does 4-point starter differ from 3-point starter? U CO1 List the different methods of speed control employed for DC series motors. R CO1 Part B Sl. Month / Question M BT CO No. Year Give the reasons for using to start D.C. motors. 3 R CO1 Nov 2010 “starters” May 2015 Draw the circuit of anyone type of starter and explain its operation. 5 R CO1 A series of resistance 1Ω between terminals runs at 800 rpm at 8 Ap CO3 200 V with a current of 15 A. Find the speed at which it will run when connected in series with a 5Ω resistance and taking the same current at the same supply voltage. Explain the different methods of excitation and characteristics of DC 16 U CO1 Nov 2011 motors with suitable diagrams. CO4 Explain the Ward Leonard system of controlling the speed of a DC 16 U CO1 Nov 2011 – shunt motor with the help of a neat diagram. With a neat sketch, explain the working of 4 point starter. 16 U CO1 Nov 2012 Nov 2015 Draw a neat sketch of 3 point starter and explain its working. 8 U CO1 Nov 2013 May 2011 Derive from the fundamental, emf and torque equations and 12 Ap CO1 Nov 2013 explain the characteristics of DC motor. What are the merits and demerits of Hopkinson’s test? 4 R CO1
Why DC series is suited for traction applications? U CO5 May 2015 Define Torque. R CO1 May 2010 What is the precaution to be taken during starting of a DC series motor? Why? U CO1 Nov 2010 What is back emf in DC motor? What is its significance? R CO1 Nov 2011 Explain why Swinburne’s test cannot be performed on DC series motor. U CO1 Nov 2011 List various method of starting DC motor. R CO1 Nov 2016 What is meant by dynamic breaking in DC motor? R CO1 Nov 2016 State the advantages of Swinburne's test. R CO1 In every DC motor, a generator action occurs. Justify Ev CO3 How to reverse the direction of rotation of a DC motor? U CO1 the applications of various DC motors R CO5 At what load does the efficiency is maximum in DC shunt machines? U CO3 How does 4-point starter differ from 3-point starter? U CO1 List the different methods of speed control employed for DC series motors. R CO1 Part B Sl. No. Question M BT CO Month / Year Give the reasons for using “starters” to start D.C. motors. Draw the circuit of anyone type of starter and explain its operation. A series of resistance 1Ω between terminals runs at 800 rpm at 200 V with a current of 15 A. Find the speed at which it will run when connected in series with a 5Ω resistance and taking the same current at the same supply voltage. 3 5 8 R R Ap CO1 CO1 CO3 Nov 2010 May 2015 Explain the different methods of excitation and characteristics of DC motors with suitable diagrams. 16 U CO1 CO4 Nov 2011 Explain the Ward – Leonard system of controlling the speed of a DC shunt motor with the help of a neat diagram. 16 U CO1 Nov 2011 With a neat sketch, explain the working of 4 point starter. 16 U CO1 Nov 2012 Nov 2015 Draw a neat sketch of 3 point starter and explain its working. 8 U CO1 Nov 2013 May 2011 Derive from the fundamental, emf and torque equations and explain the characteristics of DC motor. What are the merits and demerits of Hopkinson’s test? 12 4 Ap R CO1 CO1 Nov 2013
EM_I_Question-Bank.docx