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Total Questions : 604 | Page 6 of 61 pages
Question 51. A box which tells the effect of inputs on control sub system is known as
  1.     Decision box.
  2.     State box.
  3.     Data Box.
  4.     Logical box.
 Discuss Question
Answer: Option A. ->  Decision box.
Question 52. Which system is also known as automatic control system?
  1.     Open loop control system
  2.     Either 1 or 2
  3.     Nether 1 nor 2
  4.     Closed loop control system
 Discuss Question
Answer: Option D. ->  Closed loop control system
Question 53. Advantages of open loop control system is/are
  1.     simple and economical.
  2.     reliable.
  3.     accurate.
  4.    All of these
 Discuss Question
Answer: Option A. ->  simple and economical.
Question 54. Which of the following are the disadvantages of a closed loop control system?
  1.     Complex and costly.
  2.     Oscillatory response.
  3.    All of these
  4.     Reduces the overall gain.
 Discuss Question
Answer: Option C. -> All of these
Question 55. By using which of the following elements, mechanical translational systems are obtained?
  1.     spring element
  2.    All of these
  3.     mass element
  4.     dash-pot
 Discuss Question
Answer: Option B. -> All of these
Question 56. The output of the system has an effect upon the input quantity, then the system is a
  1.     closed loop control system.
  2.     either 1 or 2.
  3.    None of these
  4.     open loop control system.
 Discuss Question
Answer: Option A. ->  closed loop control system.
Question 57. Force balancing equation of a mass element is (where, x = displacement)
  1.     M d2x/dt2
  2.     M dx/dt
  3.     M *x
  4.     any of the above
 Discuss Question
Answer: Option A. ->  M d2x/dt2
Question 58. Force balancing equation for elastic element (K) is (where, x = displacement)
  1.     K *x
  2.    None of these
  3.     K d2x/dt2
  4.     K dx/dt
 Discuss Question
Answer: Option A. ->  K *x
Question 59. Force balancing equation of a dash-pot element is (where, x = displacement)
  1.     B d2x/dt2
  2.     B dx/dt
  3.     B *x
  4.    None of these
 Discuss Question
Answer: Option B. ->  B dx/dt
Question 60. Which of the following is/are the disadvantages of an open loop control system?
  1.     Inaccurate.
  2.     both 1 and 2.
  3.    None of these
  4.     Unreliable.
 Discuss Question
Answer: Option B. ->  both 1 and 2.

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