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.
Questionmachine-dynamics-questions-answers4.jpg
  • 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.
Questionmachine-dynamics-questions-answers5.jpg
  • 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.
Questionmachine-dynamics-questions-answers6.jpg
  • 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
0 h : 0 m : 1 s