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Pune University - FY BSc ELECTRONIC EQUIPMENT MAINTENANCE - I, April 2010

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Total No. of Questions : 5] [Total No. of Pages : 2 P209 [3717] - 32 F.Y. B.Sc. ELECTRONIC EQUIPMENT MAINTENANCE Test and Measuring Instruments and consumer products (Paper - I) (New Course) (Vocational Course) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates: 1) All questions are compulsory. 2) Figures to the right indicates full marks. 3) Draw neat diagram if necessary. Q1) Attempt the following : a) What is service manual? Explain an importance of it in brief. b) What is PMMC mechanism? Draw DC Ammeter diagram. c) Explain importance of AC Bridges and applications. d) Compare Maxwell bridge with Hay bridge by Q factor. e) What is Q meter? Write relation of Q with inductive reactance. f) What is mean by full scale deflection accuracy? Give example. g) Differentiate precision and resolution term. h) [16] What is autoranging? Give example. Q2) Answer any four : [16] a) Explain advantages of digital meters over analog meters. b) Explain multirange voltmeter with neat diagram. c) Draw block diagram of semi-automatic washing machine diagram. d) Explain in details electronic ignition system. e) Give advantages of Electronic volt meter (EVM) over conventional meter. P.T.O. Q3) Answer any four : [16] a) What is spike guard? Explain with the help of circuit diagram. b) Compare MCB with fuse. c) What is magnetron? Elaborate it s importance in microwave oven. d) Draw block diagram of CRO and explain role of delay line in CRO. e) Explain precautions to eliminate HF noise pick-up. Q4) Attempt any two of the following : [16] a) Explain Digital Storage Oscilloscope (DSO) in details. Compare analog CRO with Digital Storage Oscilloscope. b) What is Digital Clock? Draw neat circuit diagram of digital clock shows seconds, min, hours; and explain each block in brief. c) Explain working of ON-line UPS and compare ON-line UPS with OFF-line UPS technically. Q5) Answer any two of the following : [16] a) What is stabilizer? Explain general type of stabilizer and compare it with servo stabilizer. b) What is loading effect? How it is avoided? The two voltmeters are available with sensitivity of 1000 /v, 20,000 /v both meter uses 50v range. Which meter gives less error for following circuit for voltage measurement. c) Explain home protector system in details and compare it with stabilizer. vvvv [3717]-32 2

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Additional Info : F.Y. B.Sc. ELECTRONIC EQUIPMENT MAINTENANCE Test and Measuring Instruments and consumer products (Paper - I) (New Course) (Vocational Course), Pune University
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