Specifications
192
Part – III
Answer Any ten Questions in one or two sentences 10x4=40 Marks
31. Give two examples of insulating materials in each of the above classes.
32. What is meant by flexible wire?
33. What are called as half coil windings?
34. Calculate the angle between the adjacent slots for a 3 phase, single layer concentric type
of winding for a 2 pole ac machine having 12 slots.
35. Calculate the back, front and winding pitches for a 2 pole, 6 slot double layer simplex
wave connected dc machine with commutator having 12 segments.
36. Why is the armature banded? Explain.
37. What is importance of insulation testing? State the causes of insulating material
deterioration.
38. Distinguish between Non – automatic and automatic type electric toaster?
39. Distinguish between Non – automatic and automatic Iron box
40. List the precautions to be followed while using immersion water heater.
41. How do you clean body of electric mixie, its jar and blades?
42. State the uses of different types of vacuum cleaner.
Part – IV
Answer Any Five Questions Briefly (5x10=50Marks)
43. What are the differences between Thermoplastic and thermosetting plastics? Discuss the
properties of any two materials from each category.
44. State any ten properties of Enamel coating of the wires.
45. Explain the procedure of lacing the steel bands.
46. Briefly explain the construction and operation of percolator type coffee maker
47. Explain briefly the function of following in electric mixie i) different jars ii) Auto – overload
protector.
48. Brief the various problems normally arise in washing machine and discuss their remedies
49. Discuss briefly the various safety features commonly employed in hair dryers.