JNTU

JNTU B.Tech II MACHINE DRAWING Previous Question Paper (December - 2017 - R15)

B.Tech | II | II | R15 | December - 2017

Answer PaperPaper Code: 124DAMaximum Marks: 75Time: 3 Hours

Answer any THREE questions from Part-A. Part-B is Compulsory.

Part A

Sketch the following conventional materials.

10 marks

Lead

2 marks

Answer

Lead is represented by a series of closely spaced, thin, parallel diagonal lines drawn at an angle of 45 degrees, similar to the general convention for metals but with a slightly denser spacing.

Wood

2 marks

Answer

Wood is represented by a series of irregular, wavy, and broken lines that imitate the grain pattern of timber, typically shown in longitudinal sections.

Glass

2 marks

Answer

Steel

2 marks

Answer

Asbestos

2 marks

Answer

Draw sectional front view and side view of the cotter and Gib joint for connecting two square rods of side 50 mm. Take proportionate dimensions.

10 marks

Answer

Draw the sectional front view and side view of a footstep bearing, for supporting a shaft of diameter 60 mm. Give all important proportionate dimensions.

10 marks

Answer

Draw the following thread profiles for a nominal diameter of 30 mm and pitch 3 mm and give their applications:

10 marks

ACME thread

2.5 marks

Answer

Worm thread

2.5 marks

Answer

Square thread

2.5 marks

Answer

Buttress thread

2.5 marks

Answer

Part B

Assemble all the parts of lathe tailstock shown in figure and draw sectional front view and right hand side view.

45 marks

Part A

Answer

Answer

Answer

Answer

Answer

Answer

Answer

Answer

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Answer

Part B

Answer

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