Karnataka SSLC Question Paper 2020 Elements of Mechanical and Electrical Enginereing

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Question Paper Serial No.
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Total No. of Printed Pages : 4 ]
Jlflo Æ⁄√ÀÊ-V⁄◊⁄ —⁄MSÊ¿ : 10 ] CCE RF
Total No. of Questions : 10 ] CCE RR
—⁄MOÊfi}⁄ —⁄MSÊ¿ : 71 REVISED
Code No. : 71

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TEAR HERE TO OPEN THE QUESTION PAPER
Subject : ELEMENTS OF MECHANICAL AND
ELECTRICAL ENGINEERING-2

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¶´¤MO⁄ : 04. 04. 2020 ] [ Date : 04. 04. 2020
—⁄»⁄flæ⁄fl : ∑ÊÿVÊX 9-30 ¬M•⁄ »⁄fl®¤¿‘⁄-12-45 ¡⁄»⁄¡ÊVÊ ] [ Time : 9-30 A.M. to 12-45 P.M.
Æ⁄¡⁄»⁄·¤»⁄© @MO⁄V⁄◊⁄fl : 100 ] [ Max. Marks : 100
General Instructions to the Candidate :

1. This Question Paper consists of 10 subjective types of questions.

2. This question paper has been sealed by reverse jacket. You have to
cut on the right side to open the paper at the time of commencement
of the examination. Check whether all the pages of the question
paper are intact.

3. Follow the instructions given against both the objective and
subjective types of questions.

4. Figures in the right hand margin indicate maximum marks.

5. The maximum time to answer the paper is given at the top of the
question paper. It includes 15 minutes for reading the question
Tear here

paper.

21 RF & RR (A)-319 [ Turn over

71 2 CCE RF & RR
Note : Answer questions from Sections A & B as per the instructions
given under them.
SECTION – A
Note : Answer all the questions.
1. a) Classify the internal combustion engine on the basis of fuel used. 2
b) Explain the use of piston rings in an internal combustion engine. 3
c) Differentiate between two-stroke engine and four-stroke engine. 5
2. a) What is an air compressor ? 2
b) Mention the uses of air compressor. 3
c) Draw a neat sketch of reciprocating air compressor and label the
parts. 5
3. a) What is a refrigerant ? 2
b) Explain central air conditioning. 3
c) Draw a neat diagram of room air conditioner and label the parts. 5
4. a) What is the main function of lathe ? 2
b) Explain knurling operation. 3
c) Draw a line diagram of lathe and mark the specifications of lathe. 5
OR
a) Name the types of column and knee type of milling machine. 2
b) Explain plain milling processes. 3
c) Draw a neat sketch of vertical milling machine and label the parts. 5
5. a) What is fusion welding ? 2
b) Explain electric arc welding. 3
c) Draw a neat sketch of oxy-acetylene welding equipment and label the
parts. 5
SECTION – B
Note : Answer all the questions.
6. a) List any two types of induced emfs. 2
b) State the use of Fleming's Right hand rule and Left hand rule. 3
c) Draw a neat sketch of self induced emf and explain. 5
7. a) What is an alternating current ? 2
b) Define electrical power & power factor. 3
c) Represent graphically AC and DC waveforms and compare them. 5

CCE RF & RR 3 71
8. a) Define Transformer. 2
b) Mention the role of Excitor in an alternator. 3
c) Draw a neat diagram of DC shunt motor and explain its working in
brief. 5
OR
a) Define alternator. 2
b) Explain working of an alternator. 3
c) Draw a neat diagram of step-up and step-down transformer and
explain its working. 5
9. a) What is an electric fan ? 2
b) Explain working of electric stove. 3
c) Draw a neat sketch of electric bell and label the parts. 5
10. a) List two types of transistors. 2
b) Explain Forward bias and Reverse bias. 3
c) What are the advantages and applications of IC ? 5

RF & RR (A)-319 [ Turn over

71 4 CCE RF & RR