Important Electrical Machine Design Multiple Choice Questions and Answers

6.  The main areas of design are

   A. Magnetic circuit

   B. Electrical circuit

   C. Installation

   D. All of the above

7.  The basic needs of a good conducting material used for windings of electrical machines are

   A. Highest possible conductivity and least possible temperature coefficient of resistance

   B. High tensile strength and absence of the brittleness

   C. Reliability, durability, good weldability and solderability

   D. All of the above

8. ......... is universally used for windings of electrical machines

   A. Silver

   B. Aluminium

   C. Hard drawn copper

   D. Annealed copper

9.  Hot rolled sheets have ...........permeability

   A. Zero

   B. Low

   C. Unity

   D. High

10.  For a soft magnetic material there will be

   A. Steeply rising magnetization curve

   B. Relatively narrow and small hysteresis loop

   C. Less energy loss per cycle of magnetisation

   D. All of the above

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