Related Questions

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)
A $$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
B $$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$
C $$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
D $$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
A Working
B Damaging
C Allowable
D None of these
The strain energy stored in a body due to shear stress, is (where $$\tau $$ = Shear stress, C = Shear modulus and V = Volume of the body)
A $$\frac{{\tau {\text{V}}}}{{2{\text{C}}}}$$
B $$\frac{{2{\text{C}}}}{{\tau {\text{V}}}}$$
C $$\frac{{{\tau ^2}{\text{V}}}}{{2{\text{C}}}}$$
D $$\frac{{2{\text{C}}}}{{{\tau ^2}{\text{V}}}}$$
When a body is subjected to biaxial stress i.e. direct stresses ($${\sigma _{\text{x}}}$$) and ($${\sigma _{\text{y}}}$$) in two mutually perpendicular planes accompanied by a simple shear stress ($${\tau _{{\text{xy}}}}$$ ), then maximum shear stress is
A $$\frac{1}{2}\sqrt {{{\left( {{\sigma _{\text{x}}} - {\sigma _{\text{y}}}} \right)}^2} + 4\tau _{{\text{xy}}}^2} $$
B $$\frac{1}{2}\sqrt {{{\left( {{\sigma _{\text{x}}} + {\sigma _{\text{y}}}} \right)}^2} + 4\tau _{{\text{xy}}}^2} $$
C $$\sqrt {{{\left( {{\sigma _{\text{x}}} - {\sigma _{\text{y}}}} \right)}^2} + \tau _{{\text{xy}}}^2} $$
D $$\sqrt {{{\left( {{\sigma _{\text{x}}} + {\sigma _{\text{y}}}} \right)}^2} + \tau _{{\text{xy}}}^2} $$
When a body is subjected to a direct tensile stress ($${\sigma _{\text{x}}}$$) in one plane accompanied by a simple shear stress ($${\tau _{{\text{xy}}}}$$ ), the maximum shear stress is
A $$\frac{{{\sigma _{\text{x}}}}}{2} + \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$
B $$\frac{{{\sigma _{\text{x}}}}}{2} - \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$
C $$\frac{{{\sigma _{\text{x}}}}}{2} + \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 - 4\tau _{{\text{xy}}}^2} $$
D $$\frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A 0.5
B 2
C $$\sqrt 2 $$
D $$\sqrt {\frac{3}{2}} $$
A double fillet welded joint with parallel fillet weld of length '$$l$$' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by
A $$\frac{{\sqrt 2 {\text{P}}}}{{{\text{s}}l}}$$
B $$\frac{{\text{P}}}{{2{\text{s}}l}}$$
C $$\frac{{\text{P}}}{{\sqrt 2 {\text{s}}l}}$$
D $$\frac{{2{\text{P}}}}{{{\text{s}}l}}$$
Shear stress in a fluid flowing in a round pipe
A Varies parabolically across the cross-section
B Remains constant over the cross-section
C Is zero at the centre and varies linearly with the radius
D Is zero at the wall and increases linearly to the centre
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
A Newtonion
B Non-Newtonion
C Ideal
D Incompressible
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
A Equal to
B Directly proportional
C Inversely proportional
D None of these

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