WorksheetsMidterm Exam FME19
Total questions: 20
Worksheet time: 6mins
If energy is lost in any way during vibration, the system can be considered to be damped
true
false
The frequency with which an initially disturbed system vibrates on its own is known as natural frequency.
true
false
The amplitude of an undamped system will not change with time.
true
false
The response of an undamped system under resonance will be
zero
infinity
very large
1
The system governed by the equation mx + cx + kx = 0 is dynamically stable if
k is positive
c and k are positive
c is positive
The reduction of the amplitude ratio in the presence of damping is very significant
near w = infinity
near w = 0
near w = wn
The excitation can be (a) , periodic, nonperiodic or random in nature.
The response of a system to suddenly applied nonperiodic excitation is called (a) response.
The response of a system to a harmonic excitation is called (a) response.
Any periodic function can be expanded into Fourier series.
TRUE
FALSE
Harmonic motion is a periodic motion.
TRUE
FALSE
The equivalent mass of several masses at different locations can be found using the equivalence of kinetic energy.
TRUE
FALSE
For a critically damping system, the motion will be
HARMONIC
PERIODIC
APERIODIC
The logarithmic decrement denotes the rate at which the (a) of a free damped vibration decreases.
•A mechanical or structural system is said to undergo (a) whenever external energy is supplied to the system during vibration
the ratio of the dynamic to the static amplitude of motion
(a)
Any two successive displacements of the system, separated by a cycle, can be used to find the
(a)
min. no. of independent coordinates required to determine completely the positions of all parts of a system at any instant of time
(a)
If the value or magnitude of the excitation (force or motion) acting on a vibratory system is known at any given time
(a)
Damping force is proportional to the velocity of the vibrating body in a fluid medium such as air, water, gas, and oil
(a)
