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Pune University - FY BSc ELECTRONIC EQUIP MAINTENANCE -II, April 2010 (Old Course)

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Total No. of Questions : 5] P255 [Total No. of Pages :2 [3717] - 90 F.Y. B.Sc. (Vocational) ELECTRONIC EQUIPMENT AND MAINTENANCE Maintenance Concepts and Repairs (Paper - II) (Old Course) Time : 3 Hours] Instructions to the candidates: 1) 2) 3) [Max. Marks : 80 All questions are compulsory. Figures to the right indicate full marks. Draw neat diagrams wherever necessory. Q1) Attempt the following : a) Explain efficiency of transformer. b) What is Q of a coil? c) What is reactance of capacitor? d) Inductor is wattless component . Comment. e) Explain the term absolute maximum rating. f) Explain the difference between AF and RF transformer. g) Explain common faults that occur in capacitors. h) [16] Explain the term DIN RAIL Mounting . Q2) Answer any four of the following : [16] a) Name different tools required for desoldering & explain them. b) Explain the role of flux in a good solder joint. c) Explain the importance of data sheets. d) Explain the function of choke in tube light. e) Explain JEDEC scheme of numbering of semiconductor components. P.T.O. Q3) Attempt any four of the following : [16] a) Draw the neat diagram of typical stair case wiving and explain. b) Write a short note on ultrasonic soldering. c) For Instrument standardisation is necessary . Comment. List different standards which are commonly used. d) Write a short note on different soldering techniques. e) Name various types of capacitors used on the basis of the material used. Q4) Attempt any two of the following : [16] a) Explain Electric Shock . What precautions should be taken to avoid Electric Shock? b) What do you understand by 60 : 40 and 40 : 60 compositions of the solder wire? What are their advantages and disadvantages? c) With the help of neat diagram explain IFT . What is mean by tuning of IFTs? d) Explain the causes and remedies of dry solder and cold solder joint. Q5) Attempt any two of the following : [16] a) Explain good and bad solder joints. b) Write a short note on desoldering techniques. c) What are applications of registers in Electronic circuits? d) What are common faults in capacitors? kbkb [3717]-90 2

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Additional Info : F.Y. B.Sc. ELECTRONIC EQUIPMENT MAINTENANCE : Maintenance Concepts and Repairs (Paper - II) (Old Course) (Vocational Course), Pune University
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