Related Questions

The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft and $$I$$ = Mass moment of inertia of the disc attached at the end of a shaft)
A $$2\pi \sqrt {\frac{{\text{q}}}{I}} $$
B $$2\pi \sqrt {{\text{q}}I} $$
C $$\frac{1}{{2\pi }}\sqrt {\frac{{\text{q}}}{I}} $$
D $$\frac{1}{{2\pi }}$$
Longitudinal vibrations are said to occur when the particles of a body moves
A perpendicular to its axis
B parallel to its axis
C in a circle about its axis
D none of the mentioned
In a single dry plate clutch, torsional vibrations are absorbed by
A Coil springs known as torsional springs
B Cushion springs
C Central hub
D Clutch pedal
When the particles of a body moves perpendicular to its axis, then the body is said to have
A Longitudinal vibration
B Transverse vibration
C Torsional vibration
D None of these
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
A More than
B Less than
C Same as
D None of these
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.
A Equal to
B Directly proportional to
C Inversely proportional to
D Independent of
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body and $$\delta $$ = Static deflection of the body)
A $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{s}}}{{\text{m}}}} $$
B $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{g}}}{\delta }} $$
C $$\frac{{0.4985}}{{\sqrt \delta }}$$
D Any one of these
When a body is subjected to transverse vibrations, the stress induced in a body will be
A shear stress
B tensile stress
C compressive stress
D none of the mentioned
A body is said to be under forced vibrations, when
A There is a reduction in amplitude after every cycle of vibration
B No external force acts on a body, after giving it an initial displacement
C A body vibrates under the influence of external force
D None of the above
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$

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