STUPIDSID
1(a)
Differentiate between
(1) Torsional Shear Stress & Transverse Shear Stress
(2) Compressive Stress & Crushing Stress
(1) Torsional Shear Stress & Transverse Shear Stress
(2) Compressive Stress & Crushing Stress
7 M
Solved any one question from Q.1(b) &Q.1(c)
1(b)
Name the different theories of failures of mechanical components made of ductile material. Explain the maximum shear stress theory giving conservative
zone.
7 M
1(c)
Explain in brief Coulomb Mohr Theory of failure of the mechanical
Components.
7 M
Solved any one question from Q.2 & Q.3
2(a)
Describe Hertz contact stress theory giving suitable examples.
7 M
2(b)
Design and draw a neat sketch of spigot rod for the cotter joint using the
following data..
Axial load 30 KN Tensile stress = 50 N/mm2 Crushing Stress = 90 N/mm2 And Shear Stress = 35 N/mm2
Axial load 30 KN Tensile stress = 50 N/mm2 Crushing Stress = 90 N/mm2 And Shear Stress = 35 N/mm2
7 M
3(a)
Determine the principals Stresses for 35mm rod diameter supported at end act as cantilever beam which is subjected to an axial compressive load of 15KN & twisting moment of 250Nm.
4 M
3(b)
Design a Bell crank lever having load arm 500mm and effort arm of 150mm
respectively. The maximum load to be raise is 4500N. Use the following allowable stresses for the pin and lever material. Tensile Stress = 75 N/mm2
Shear Stress= 60 N/mm2 & Bearing pressure = 10 N/mm2
7 M
Solved any one question from Q.4 & Q.5
4(a)
Distinguish between beams, columns and strut giving suitable examples.
7 M
4(b)
State and explain the CASTIGLIANO'S theorem and determine the magnitude of strain energy stored for a cantilever beam subjected to torsional moment T having span length L and cross Sectional area A.
7 M
5(a)
What is slenderness ratio of column? How crippling stress is decided by using Euler's equations? Give the validity of the equation.
7 M
5(b)
What are the limitations of Euler's equation how they are overcome? Explain the two empirical formula with the name.
7 M
Solved any one question from Q.6 & Q.7
6(a)
Compare the weight, strength and rigidity of a hollow shaft of same external diameter as that of solid shaft, Both the shaft are made of same material. Assume that the
diameter ratio for the hollow shaft as 0.6.
7 M
6(b)
A bracket is bolted to column by 6 bolts arrange in two column. The distance
between bolts along the row is 75mm and along the column 50mm. The joint is subjected to maximum eccentric force of 50KN acting at 150mm away from the centre of column. Taking allowable stress in the bolt as 150N/mm2 , Determine the size of each bolt.
7 M
7(a)
A solid rectangular bar of 100mm width and 150mm depth is welded to vertical column by means of fillet weld all around. The joint is subjected to 25KN at
distance of 500mm from the plane of weld. Determine throat thickness using allowable stress of weld is 75N/mm2 .
7 M
7(b)
Design a split muff coupling to transmit 30 KW power at100 rpm, using the following data.
Number of bolts = 4, allowable shear stress for shaft and key = 40N/mm2 ,
allowable tensile stress for the blots = 70N/mm2 . Take co-efficient of friction = 0.3.
7 M
8(a)
Draw a neat sketch of turn buckle used for tie rods, giving design procedure.
7 M
8(b)
What is magnitude of tolerance? Give the list of 6 manufacturing methods along with the recommended tolerance grade.
7 M
Solved any one question from Q.8(b) & Q.8(c)
8(c)
Explain with the help of neat sketch the terminology used in relation with the tolerances.
7 M
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