SHRI SANT GADGE BABA COLLEGE OF ENGG
SHRI SANT GADGE BABA COLLEGE OF ENGG. & TECH, BHUSAWAL
DEPARTMENT OF MECHANICAL ENGG.
UNIT TEST-II - (Session2011-2012)QUESTION BANKSubject:-
Mechanical Vibration Class-B.E (Mech)Q.1The weight of an electrical
motor is 125 N and it runs at 1500 rpm. The armature weight 35 N
and its centre of gravity lies 0.05 cm from the axis of rotation.
The motor is mounted on five spring of negligible damping so that
the force transmitted is one eleventh of the impressed force.
Assume that the weight of the motor is equally distributed among
the five spring. Determine
1. Stiffness of each spring.
2. Dynamic force transmitted in the base at the operating
speed.
3. Natural frequency of the system.
Q.2Write a short note on Houdaille damper
Q.3Explain vibration measuring instruments
Q.4Derive the expression of forced vibration with hysteresis
Q.5Write a short note on magnification factor.
Q.6Explain the methods to control of vibration
Q.7Describe vibration isolation and explain forced vibration
with rotating and reciprocating unbalance.
Q.8Explain logarithmic decrement
