1.D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this

2.Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control

3.D.C. generators are normally designed for maximum efficiency around

4.The purpose of retardation test on D.C. shunt machines is to find out

5.D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the