Specifications

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Part - B
Answer the following questions in one or two words (1 Mark)
1. Which type of maintenance is called as a daily maintenance procedure?
2. What maintenance procedure is based on inspection or diagnosis?
3. How the air gap is measured in electric motors?
4. Which type of puller is more safe for bearing removal?
5. What type of fit does the cylindrical roller bearings have?
6. What is the inspection interval for Circulating lubrication system under normal operating
conditions?
7. To get smooth running and long useful life, the rotating parts are subjected to this. What is it?
8. What is the name of the balancing operation done when the rotor is rotating?
9. What will happen to motor insulation due to presence of moisture?
10. What is the device used to measure Insulation?
11. Absence of which part makes the ac motor almost maintenance free?
12. What is the main trouble maker in single phase motors?
13. Which type of grinding paper should not be used for grinding carbon brushes?
14. What is name given for removal of dirty grease and oily matter by means of a chemical
solvent ?
15. Which type of varnish impregnation method gives best results?
Part - C
Answer the following questions briefly (4 Marks)
1. What are the different types of maintenance practices?
2. What are the drawbacks of Breakdown maintenance?
3. In what intervals preventive maintenance operations are normally carried out?
4. What is a puller? How it is used?
5. What are the precautions to be taken while fitting the bearing?
6. Name the steps to be taken ensure long service life of the bearings.
7. What is Balancing? State its importance.
8. Differentiate between static balancing and dynamic balancing?
9. What are the basic preventive maintenance steps to be taken for uninterrupted operation of
motor?
10. What are the routine maintenance steps to be taken for proper operation of squirrel cage
induction motor?