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ESE 2021 ME Technical Quiz || Balancing of Reciprocating and Rotating Masses

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Question 1

Which of the following is correct for in-line four cylinder four-stroke Engine which has inner cranks (throws) are at 180 degree to the outer throws.
Which of the following option is INCORRECT?

Question 2

Masses A, B and C are attached to a shaft in a parallel plane and shaft is rotating at 250 rpm as shown in the figure. The mass C is

Question 3

For a single cylinder reciprocating engine mass of the reciprocating part is 40kg and mass of the revolving part is 30 kg. If the crank rotate at 150 rpm and the stroke length is 400 mm. Only 60 % of the reciprocating masses and all revolving masses need to be balanced. Determine the required mass at a radius of 300 mm.

Question 4

What are the parameters that need to be balanced for a static balancing of a rotating masses. Assume all masses to be rigid in nature.

Question 5

In balancing of reciprocating masses, the secondary forces are
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Jun 30ESE & GATE ME