Dynamics of Machinary MCQs with answers Page - 3

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Q. A system, which is free from both the ends

  • (A) Definite system
  • (B) Semidefinite system
  • (C) Both a and b
  • (D) None of the above

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Q. A system, which is fixed from one end or both the ends is referred as

  • (A) Definite system
  • (B) Semidefinite system
  • (C) Both a and b
  • (D) None of the above

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Q. In a system with different shaft parameters, the longest shaft is taken for calculations.

  • (A) TRUE
  • (B) FALSE
  • (C) ---
  • (D) ---

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Q. In a system with different shaft parameters ------------- is taken which depends on the length and diameters of each shaft.

  • (A) Equivalent shaft length
  • (B) length of first shaft
  • (C) lrngth of intermediate shaft
  • (D) None of these

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Q. From the following data, calculate the location of node from the left end of shaft (l1).l1=0.6m, l2=0.5m, l3=0.4m d1=0.095m, d2=0.06m, d3=0.05m Ma = 900 Kg, Mb = 700 Kg ka = 0.85m, kb = 0.55m

  • (A) 0.855m
  • (B) 0.795m
  • (C) 0.695m
  • (D) 0.595m

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Q. In balancing of single-cylinder engine, the rotating unbalance is ____________

  • (A) completely made zero and so also the reciprocating unbalance
  • (B) completely made zero and the reciprocating unbalance is partially reduced
  • (C) partially reduced and the reciprocating unbalance is completely made zero
  • (D) partially reduced and so also the reciprocating unbalance

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Q. Let the disturbing mass be 100 kg and the radius of rotation be 10 cm and the rotation speed be 50 rad/s, then calculate the centrifugal force in kN.

  • (A) 50
  • (B) 25
  • (C) 50000
  • (D) 25000

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Q. 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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Q. If all the masses are in one plane, then what is the maximum no. of masses which can be placed in the same plane?

  • (A) 3
  • (B) 4
  • (C) 6
  • (D) No limitation

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Q. Which of the following statements is correct about the balancing of a mechanical system?

  • (A) If it is under static balance, then there will be dynamic balance also
  • (B) If it is under dynamic balance, then there will be static balance also
  • (C) Both static as well as dynamic balance have to be achieved separately
  • (D) None of the mentioned

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