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Karnataka SSLC JTS : KSEEB Elements of Engg JTS I April 2009

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J X R_ z W : 7 ] [ Total No. of Questions : 7 ] J X zW : 3 [ Total No. of Printed Pages : 3 x z W : J.T.S. I Code No. : J.T.S. I : | ] I Subject : ELEMENTS OF ENGINEERING I : 08 - 04 - 2008 Date : 08 - 04 - 2008 : B 10-30 W R 1-00 ] [ Time : 10-30 A.M. to 1-00 P.M. ] : 50 [ Max. Marks : 50 Note : Answer questions from Sections A & B as per the instructions given under them. SECTION A Instruction : Answer Question No. I and any two full questions of the remaining. I. Fill in the blanks with the appropriate word(s) choosing from the ones given in the brackets : a) 10 1 = 10 Copper is a good material. ( insulator, semiconductor, conductor ) b) The core of a transformer is made of . ( silicon steel, cast iron, cast steel ) c) Commutator segments are made of . ( silver, copper, aluminium ) [ Turn over J.T.S. I d) 2 Direction of rotation of a dc motor is given by . ( Fleming s left hand rule, Cork screw rule, Fleming s right hand rule ) e) lamp is used in the film projector. ( Arc, Incandescent, Mercury vapour ) f) Babcock and Wilcox boiler is a boiler. ( fire-tube, water-tube, water-tube and fire-tube ) g) Centrifugal pump works on the principle of force. ( centrifugal, reciprocating, kinetic ) h) is used to save the boiler against over heating of boiler. ( Fusible plug, Safety valve, Blow off valve ) i) Spark plug is used in engines. ( diesel, diesel and petrol, petrol ) j) pump can handle dirty water. ( Reciprocating, Centrifugal, Tube well ) II. a) Give any two examples for water-tube boiler and fire-tube boiler. 3 b) Draw a neat sketch of simple vertical boiler and label its important parts. c) List the important boiler accessories. 2 a) Define heat engine. 2 b) List the important parts of steam engine. 2 c) III. 5 Draw a neat sketch of four-stroke diesel engine and label its important parts. IV. 6 a) What is a pump ? How are they classified ? 3 b) Draw a neat sketch of Pelton wheel and explain briefly. 5 c) Mention any three differences between reciprocating pump and centrifugal pump. 2 3 J.T.S. I SECTION B Instruction : Answer any two full questions of the following. V. Explain with a neat sketch, core-type transformer. 4 b) Mention any three applications of transformer. 3 c) What do you mean by a conductor ? Give two examples. 3 a) State Fleming s right hand rule. 2 b) How are the dc generators classified ? 3 c) VI. a) Draw a neat diagram of incandescent lamp and explain briefly. 5 VII. a) Name the different systems of wiring used for domestic purposes. 4 b) Explain the construction and operation of a modern electric cooking range. c) 4 Mention the uses of the following measuring instruments : 2 i) Galvanometer ii) Voltmeter iii) Energymeter iv) Ammeter. [ Turn over

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Additional Info : Karnataka SSLC (Secondary School Leaving Certificate) Junior Technical School (JTS) - Karnataka Secondary Education Examination Board (KSEEB)
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