Machine Drawing

40 Machine Drawing

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d:\N-Design\Des2-1.pm5 Seventh Print

2.11 How are sizes of letters and numerals specified?

2.12 How do you represent a sectioned surface on a drawing?

2.13 Name the features which should not be shown hatched, when they are sectioned longitudinally.

2.14 What is the angle at which hatching lines are drawn to the axis or to the main outline of the

section.

2.15 What do you understand by revolved and removed sections?

2.16 Explain the terms, (a) half section, (b) local section and (c) successive sections.

2.17 List out the elements of a dimension line.

2.18 Give the shape identification symbols for the following: (a) diameter, (b) radius, (c) square and

(d) spherical radius.

2.19 List out the various principles to be followed while dimensioning a drawing.

2.20 What are the rules to be adopted during execution of dimensioning?

2.21 Discuss the two methods, normally followed while dimensioing a drawing.

2.22 Discuss the various ways of arranging dimensions.

2.23 Explain the following notes:

(a) 4 HOLES, EQUI-SP 12 C BORE 15 DEEP 8

(b) U/C WIDE 6 DEEP 3

(c) 6 REAM FOR TAPER PIN 6 × 50

DRAWING EXERCISES

2.1 Sketch the following types of lines:

(a) centre line, (b) cutting plane line and (c) long break

2.2 Sektch the conventional representation of the following materials: (a) bronze, (b) cast iron,

(c) concrete, (d) wood and (e) white metal.

2.3 Sketch the conventional representation of the following:

(a) External threads, (b) internal threads, (c) splined shaft, (d) bearing, (e) square on shaft, (f)

compression spring, (g) tension spring, (h) spur gear and (i) helical gear.

2.4 Sketch the various dimension line terminations and origin indication.

2.5 Sketch the method of dimensioning chamfers and countersunks.

2.6 How are, (a) screw threads and (b) tapered features, dimensioned?

2.7 Identify (i) Functional, (ii) Non-functional and (iii) Auxiliary dimensions in Fig. 2.57.

Fig. 2.57