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Machine Dynamics
Tough Machine Dynamics
Quiz 1
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Q.1
Let the disturbing mass beKg, with radius of rotation = 0.1m, if one of the balancing mass isKg at a radius of rotation 0.then find the other balancing mass situated at a distance of 0.2m.
a) 80
b) 40
c) 20
d) 10
Q.2
A single mass defect needs to be balanced by a single balancing mass
a) True
b) False
Q.3
In a system two masses are used to balance the unbalanced forces. Find the mass of the balancing mass which has to be situated at a distance of 20cm, if the disturbing mass is ofKg having radius of rotation of 0.1m. One of the balancing mass isKg with RoR of 10cm.
a) 70
b) 35
c) 20
d) 10
Q.4
In the given figure, m1=Kg, m2=30Kg and m=Kg, if r1=0.and r=0.3m, l=1m, find l2.
a) 0.26m
b) 0.52m
c) 1.04m
d)0.13m
Q.5
In the given figure, m1=Kg m2=30Kg and m=Kg, if r1=0.and r=0.3m, l=1m, find l2.
a) 0.26m
b) 0.52m
c) 1.04m
d) 0.13m
Q.6
In the given figure, m1=Kg, m2=30Kg and m=Kg, if r=0.3m, l=1m, find l2 = 0.5m, find r1 in m.
a) 1.5
b) 0.75
c) 3
d) 6
Q.7
Unbalanced mass leads to vibrations.
a) True
b) False
Q.8
Which of the following statement is correct?
a) In any engine, 100% of the reciprocating masses can be balanced dynamically
b) In the case of balancing of multicylinder engine, the value of secondary force is higher than the value of the primary force
c) In the case of balancing of multimass rotating systems, dynamic balancing can be directly started without static balancing done to the system
d) none of the mentioned
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