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