Related Questions

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
Overmodulation (amplitude) occurs when signal amplitude is ___________ carrier amplitude
A Equal to
B Greater than
C Less than
D None of the above
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
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?
A 1
B >1
C None of these
In counter current flow heat exchanger, the logarithmic temperature difference between the fluids is ________ as compared to parallel flow heat exchanger.
A Same
B Less
C Greater
D None of these
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.
A Equal to
B Less than
C Greater than
D None of these
In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference
A Is always less than arithmetic average value
B Is always more than arithmetic mean value and the geometric mean value
C Is always less than arithmetic mean value, but more than geometric mean value
D May be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current
Find the value of x for the logarithmic function log, (4x-3) = 2.
A 1
B 3
C 2 or 1
D 3 or 1
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
If $$\frac{\omega }{{\omega {\text{n}}}}$$ is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
A 0°
B 90°
C 180°
D 360°

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