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Topic wise Paper Solution

Examination: 2017 SUMMER
Que.No Question/Problem marks
Q 1b)(i)

What are the factors to be considered for selection of materials for design of machine elements?

6

Q 1 l )

What is factor of safety? State its importance in design of machine elements.

8

Q 2c)(ii)

Explain the following types of stresses a) Transverse shear stress b) Compressive stress c) Torsional shear stress

8

Q 4a)(i)

(i) Give the composition of : 1) 35Mn 2 Mo28 2) 30Ni 4 Crl and 3) 25 Cr 3 Mo 55

4

Q 4b)(ii)

Explain the importance of Aesthetic considerations in design by giving any two examples.

6

Examination: 2017 WINTER
Que.No Question/Problem marks
Q 1 a )

Define machine design.

2

Q 1 b )

Give the composition of

2

Q 1b)(ii)

2) Define : a) Ductility b) Toughness c) Creep

8

Q 1 c )

State four types of loads acting on machine elements

2

Q 1 d )

What do you mean by creep?

2

Q 1 e )

Define Ergonomics.

2

Q 1 n )

Draw stress – strain diagram for brittle material.

2

Q 2 b )

State the theories of elastic failure. Explain maximum normal stress theory and maximum shear stress theory with equations.

8

Q 2c)(i)

(i) State and describe in brief about four ergonomic considerations in the designing of machine elements.

8

Q 3a)(i)

Explain with neat sketches only (i) Methods of reducing stress concentration in cylindrical members with shoulders.

4

Q 3 c )

Define stress concentration. What are the causes of stress concentration? State any four methods of reducing stress concentration with neat sketches.

8

Q 6b)(i)

Identyfiy the metrial and its compotion

8

Examination: 2016 SUMMER
Que.No Question/Problem marks
Q 1b)(l)

What is stress concentration ? State the remedial measures to control the effect of stress concentration with neat sketches

6

Q 1 i )

Draw stress-strain diagram for ductile material stating salient points

4

Q 2a)(i)

State any four factors that govern ‘factor of safety’.

8

Q 3 a )

State any four advantages of standardization.

4

Q 4a)(i)

Define Endurance limit and draw typical S-N curve for steel.

4

Q 4b)(i)

Describe the importance of aesthetic considerations in design related to shape, colour and surface finish.

6

Examination: 2016 WINTER
Que.No Question/Problem marks
Q 1a)(i)

What is stress concentration? State its significance in design of machine elements

4

Q 1b)(i)

State and explain main considerations in machine design.

6

Q 2c)(i)

State applications of maximum shear stress theory and principal normal stress theory

8

Q 3 a )

State the composition of the materials 30 Ni 16 Cr5, 40C8, FeE230 X15Cr25Ni 12

4

Q 4a)(i)

State four examples of ergonomic considerations in the design of a lathe machine.

4

Q 4b)(ii)

Draw S-N curve. Explain the concept of endurance limit and its need in design of machine elements

6

Examination: 2015 WINTER
Que.No Question/Problem marks
Q 1a)(l)

What are the steps involved in general design procedure? Explain.

4

Q 1a)(l)

What is stress concentration? Explain any four methods to reduce it.

6

Q 2c)(i)

Explain with neat sketch the stress-strain diagram for ductile material.

8

Q 3 a )

State the composition of following materials................

4

Q 4a)(l)

 State the meaning of following colour codes in aesthetic consideration while designing the product:..........

4