As you requires I am here giving you here sample question paper for BTECH Mechanical Engineering students of Uttarakhand Technical University.

Sample paper:
Attempt any four of the following :

What are the factors on which the choice of
material for machine elements depends ? Also
discuss the properties of materials to be
considered while selecting for a machine element.

What are preferred numbers ? How will you find
the numbers belonging to R5 series ?

Discuss the importance of standardization in
destgn with suitable examples. Explain various
standards used in machine design.

What do you understand by the following
designation of materials :
40C7, 40Crl, 35Nilcr60, 40CrlY2l, FG350

Discuss the important non-metallic materials
used in engineering practices.

Attempt any four of the following 5x4-20

A)Load on a bolt consists of an axial pull of
15 kN with transverse shear force of 7 kN.
Find the required diameter ofbolt according to maximum shear stress theory. permissible tensile stress at elastic limit = 120 Mpa and poisson's ratio : 0.3.

(b) At a critical section in a shaft, the bending
stress : 60 MPa and torsional shear stress :
40 MPa. Determine the facor of safety according
to (i) I\{ax. normal stress theory and (ii) Max.
shear stress theory. Yield stress of shaft material
is 300 MPa and Poisson's ratio is 0.3.

(c) What is meant by stress concentration ? How
it can be mitigated ? Discuss with examples.

d)Determine the thickness of a IZ0 mm wide
uniform plate for safe continuous operation if the
plate is to be subjected to a tensile load that has
a maximum value of 250 kN and a minimum
value of 100 kN. Properties of plate material;
Endurance lirnit stress : 225 Mpa; yield point
j$tress : 280 MP4 factor of safety = 1.8.

e)What is meant by endurance stren_qth of a
materiai ? How do the size and surface condition
of a componerrt and type of load effect such
strength ?