me2257 set2

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    ANNA UNIVERSITY : CHENNAI – 600 025

    B.E./B.Tech. DEGREE EXAMINATIONS. Apr./May.-2013

    Regulations – 2008

    Fourth SemesterB.E. Mechanical Engineering/

    ME2257 COMPUTER AIDED MACHINE DRAWING LABORATORY

    Time: 3 Hours Maximum Marks: 100

    Mark Allotment Pattern

    Aim/Procedure/System

    requirements

    Theory and

    Sketches

    Part – A

    2D CAD Modelor

    Manual Drawing

    (Any One)

    Part – B

    Viva Total

    15 25 50 10 100

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    ME2257 - COMPUTER AIDED MACHINE DRAWING LABORATORY

    Note: Select any one question from Part – A and one question from Part – B

    Part – A (Marks: 25)

    1. With a neat sketch mark the dimensions of the edge preparation for the butt

    welds.

    2. Draw the standard location of elements of a welding symbol.

    3. With a neat sketch explain caulking and fullering in riveted joint.

    4. (a) Name the commonly used materials for rivets.

    (b) How riveted joints made air tight?

    5. Through sketches, indicate the various types of welding joints.

    6. Sketch and explain the two conventional signs used for welding as per BIS.

    7. (a) Categorize the welding symbols.

    (b) How weld symbols shown in the drawing?

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    8. What is a cotter and where is it used? What is the purpose of using a gib alone

    with a cotter in a cotter joint?

    9. What is knuckle joint and where it is used? What is the difference between the

    eye end and fork end of a knuckle joint?

    10. Distinguish between the following

    (a) Left hand and right hand thread

    (b) Metric and BSW threads

    11. Distinguish between the following

    (a) Square and ACME thread

    (b) Pitch and lead of a thread

    12. How are the following threads designated as per BIS.

    (a) Metric thread with coarse pitch

    (b) Metric thread with fine pitch

    (c) Square thread

    (d) ACME thread

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    13. Sketch the following thread profiles for a nominal diameter of 25 mm and

    pitch 3 mm and give their applications

    (a) Square thread

    (b) ACME thread

    14. Sketch the conventional representation of the following

    (a) External thread

    (b) Internal thread

    (c) Thread in section(d) Assembled threads in section

    15. Define the terms :

    (a) Basic size

    (b) Limits

    (c) Allowance

    (d) Tolerance

    16. (a) What is unilateral tolerance?

    (b) What is bilateral tolerance?

    17. What is fundamental tolerance and how tolerance is denoted?

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    18. What is meant by the term fit and how are fits classified?

    19. Differentiate between clearance fit and transition fit.

    20. Differentiate hole basis system and shaft basis system?

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    Note: Select any one question from Part – A and one question from Part – B

    Part – B (Marks: 30)

    1. Manually sketch the butt-muff coupling as shown in Figure 1(b) and half-lap

    muff coupling as shown in Figure 2 (b).(Take D = 30 mm, W = 5 & T = 3 mm) (25 + 25)

    Figure 1

    Figure 2

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    2. Manually sketch the split muff coupling as shown in Figure 3 (b) and flanged

    coupling as shown in Figure 4 (b).

    (Take D = 30 mm, W = 5 & T = 3 mm) (25 + 25)

    Figure 3

    Figure 4

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    3. Manually sketch the protected type flange coupling as shown in Figure 5 and

    solid flanged coupling as shown in Figure 6.

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 5

    Figure 6

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    4. Manually sketch the universal coupling as shown in Figure 7 (b).

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 7

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    5. Manually sketch the Plummer block as shown in Figure 8.

    Figure 8

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    6. Manually sketch the screw jack as shown in Figure 9.

    Figure 9

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    7. Manually sketch the screw jack as shown in Figure 10. (Body, Barrel &

    Spindle)

    Figure 10

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    8. Manually sketch the Plummer block as shown in Figure 11.

    Figure 11

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    9. Manually sketch the screw jack as shown in Figure 12.

    Figure 12

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    10. Manually sketch the universal joint as shown in Figure 13.

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 13

    11. Manually sketch the machine vice as shown in Figure 14.

    Figure 14

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    12. Manually sketch the stuffing box as shown in Figure 15.

    Figure 15

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    13. Manually sketch the safety valve as shown in Figure 16.

    Figure 16

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    14. Manually sketch the non-return valve as shown in Figure 17.

    Figure 17

    15. Manually sketch the connecting rod as shown in Figure 18.

    Figure 18

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    16. Using CAD software sketch the butt-muff coupling as shown in Figure 19(b)

    and half-lap muff coupling as shown in Figure 20 (b).

    (Take D = 30 mm, W = 5 & T = 3 mm) (25 + 25)

    Figure 19

    Figure 20

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    17. Using CAD software sketch the split muff coupling as shown in Figure 21 (b)

    and flanged coupling as shown in Figure 22 (b).

    (Take D = 30 mm, W = 5 & T = 3 mm) (25 + 25)

    Figure 21

    Figure 22

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    18. Using CAD software sketch the protected type flange coupling as shown in

    Figure 23 and solid flanged coupling as shown in Figure 24.

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 23

    Figure 24

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    19. Using CAD software sketch the universal coupling as shown in Figure 25 (b).

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 25

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    20. Using CAD software sketch the Plummer block as shown in Figure 26.

    Figure 26

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    21. Using CAD software sketch the screw jack as shown in Figure 27.

    Figure 27

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    22. Using CAD software sketch the screw jack as shown in Figure 27. (Body,

    Barrel & Spindle)

    Figure 28

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    23. Using CAD software sketch the Plummer block as shown in Figure 29.

    Figure 29

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    24. Using CAD software sketch the screw jack as shown in Figure 30.

    Figure 30

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    25. Using CAD software sketch the universal joint as shown in Figure 31.

    (Take D = 30 mm, W = 5 & T = 3 mm)

    Figure 31

    26. Using CAD software sketch the machine vice as shown in Figure 32.

    Figure 32

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    27. Using CAD software sketch the stuffing box as shown in Figure 33.

    Figure 33

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    29. Using CAD software sketch the non-return valve as shown in Figure 35.

    Figure 35

    30. Using CAD software sketch the connecting rod as shown in Figure 36.

    Figure 36