General Mechanical Engineering, Question Paper of B.Tech AE (D) 4th Semester, Download Previous Years Question Paper 4

Roll no. 

GENERAL MECHANICAL ENINEERING

4^th Exam/Auto/9308/Dec’10

Duration :03 Hrs.

Note : Attempt any five questions. Question no. 1 is compulsory.

1.     Fill in the blanks

a.     The ratio of lateral strain to linear strain is known as ___

b.     Factor of safety = ____

c.      A beam supported on more than two supports is known as _---

d.     The negative B.M is also known as ____

e.      The unit of M.O.I is _____

f.       The bending stress on the neutral axis if ____

g.     In case of a cantilever tensile stress are induced _____ the neutral axis.

h.     Maximum bending stress in a beam is at the ____ fibers.

i.       The circumferential stress in as ___ the longitudinal stress.

j.       Torque produces _____ stress in the shaft. 

2.       

a.     Explain the terms:- young’s Modulus, Passion ratio, Modulus of rigidity and Hooke’s law.

b.     A rod 20mm in diameter &   2m long is subjected to an axial pull of  35KN. If the young modulus of elasticity of the material of the rod  is 210GN/M,

                                                             i.      Stress

                                                           ii.      Strain.

                                                        iii.      Elongation of the rod.

3.      

a.     Write assumption used in bending in beams

b.     A rectangular beam 300mm deep & 150 mm wide is simply supported over a span of 8m find the max. U.D.L that the beam can carry, if the bending stress is not to exceed 120N/mm2.

4.       

a.     Explain the sign convention used in B.M

b.     Draw the S.F & B.M diagram for the beam shown in fig.

5.       

a.     Write assumption used in tensional equation and define tensional rigidity.

b.     A solid shaft of 100mm diameter is to transmit 160KW at 100  rpm find the angle of twist for a length of 6m if the max. torque exceeds the mean by 40% take C = 8X10 N/mm2

6.       

a.     Write difference between wheel and governor

b.     What do you mean by higher pair & lower pair. Write example of each.

c.      What are the causes of vibration.

7.     Explain any three of the followings:

a.     Static balancing.

b.     Inversion of mechanism

c.      Helical springs.

d.     Laminated springs.