Thursday, November 03, 2016
Roll no.
GENERAL MECHANICAL
ENINEERING
4th
Exam/Auto/9308/May’07
Duration :03 Hrs.
Note : Attempt any five questions. Question no. 1 is
compulsory.
1.
a.
What do you mean by factor of safety?
b.
MOI of a rectangle about its base is ______
c.
A beam whose both ends are fixed is called ____
d.
A load acting of a point is called a ____
e.
Define radius of gyration.
f.
What is UDL?
g.
Define static balancing.
h.
Define polar modulus of the shaft.
i.
The circumferential stress is ___ the
longitudinal stress.
j.
Write torsion equation.
k.
Function of a governor is to control the supply
of _______
l.
The ball and socket joint forms a _____ pair.
m. Define
solid length of a spring.
n.
The moment of inertia of a flywheel is _______
o.
In case of free vibration, there is no ______
Section –B
2.
a.
Explain section modulus for rectangle and for
circular section.
b.
Find the dia. Of circular shaft of a simply
supported shaft 6 m span which carries an 81 KN weight due to pulley mounted at
the centre of span. If permissible bending stress of the shaft materiel is
limited to 8.4 mPa.
3.
a.
Explain different types of beam.
b.
A T section has flange of 200 mm x 12mm, web of
350 mm x 10mm, overall depth 362 mm calculate the moment of inertia about its
controidal axis
4.
a.
What are assumption in the theory of pure
torsion?
b.
A solid shaft has to transmit 75 kw at 200 rpm.
Taking allowable stress at 70 mN/m2. Find suitable dia of the shaft if the
maximum torque transmitted exceeds the mean by 30%
5.
a.
Define ‘machine’ and ‘mechanism’. Explain how
they are different from one another.
b.
What is a kinematic pair? Give example to
explain the difference between the lower and higher pair.
6.
a.
What are centrifugal and inertia types of
governors. Which is preferred and why?
b.
Explain the concept of balancing of rotary pats.
7.
Explain
a.
Different types of end supports
b.
Type of stresses
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