Dynamics of Machinary MCQs with answers Page - 5

Here, you will find a collection of MCQ questions on Dynamics of Machinary. Go through these questions to enhance your preparation for upcoming examinations and interviews.

To check the correct answer, simply click the View Answer button provided for each question.

Have your own questions to contribute? Click the button below to share your MCQs with others!

+ Add Question

A

Admin • 831.35K Points
Coach

Q. Let the centrifugal force in kN be 25 and the radius of rotation be 20 cm and the rotation speed be 50 rad/s, then calculate the mass defect in Kg.

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

A

Admin • 831.35K Points
Coach

Q. In a multicylinder inline engine, each imaginary secondary crank with a mass attached to the crankpin is inclined to the line of stroke at which angle?

  • (A) Twice the angle of crank
  • (B) Half the angle of crank
  • (C) Thrice the angle of crank
  • (D) Four times the angle of crank

A

Admin • 831.35K Points
Coach

Q. In order to achieve stability, the sum of secondary forces and secondary couples must be ------- and their respective polygons must be …......

  • (A) Zero, Closed
  • (B) one, Open
  • (C) Zero, open
  • (D) one, closed

A

Admin • 831.35K Points
Coach

Q. For the secondary balancing of the engine, which of the condition is necessary?

  • (A) Secondary force polygon must be close
  • (B) Secondary force polygon must be open
  • (C) Primary force polygon must be close
  • (D) Primary force polygon must be open

A

Admin • 831.35K Points
Coach

Q. The numerical values of the secondary forces and secondary couples couples may be obtained by considering the ___________

  • (A) Revolving mass
  • (B) Reciprocating mass
  • (C) Translating mass
  • (D) Rotating mass

A

Admin • 831.35K Points
Coach

Q. Which of the following is the correct expression for secondary force?

  • (A) m?^2r.cos2θ/n
  • (B) m ?^2r.sin2θ/n
  • (C) m?^2r.tan2θ/n
  • (D) m?^2r.cosθ/n

A

Admin • 831.35K Points
Coach

Q. A V-twin engine has the cylinder axes at 90 degrees and the connecting rods operate a common crank. The reciprocating mass per cylinder is 23 kg and the crank radius is 7.5 cm. The length of the connecting rod is 0.3 m. If the engine is rotating at the speed is 500 r.p.m. What is the value of maximum resultant secondary force in Newtons?

  • (A) 7172
  • (B) 1672
  • (C) 1122
  • (D) 1272

A

Admin • 831.35K Points
Coach

Q. A V-twin engine has the cylinder axes at 90 degrees and the connecting rods operate a common crank. The reciprocating mass per cylinder is 34.5 kg and the crank radius is 7.5 cm. The length of the connecting rod is 0.3 m. If the engine is rotating at the speed is 500 r.p.m. What is the value of maximum resultant secondary force in kN?

  • (A) 2.238
  • (B) 2.508
  • (C) 2.754
  • (D) 2.908

A

Admin • 831.35K Points
Coach

Q. From the given data, find the balancing mass in Kg if r=0.2m required in the same plane.Masses = 200kg, 300kg, 240 kg, 260Kg, corresponding radii = 0.2m, 0.15m, 0.25m and 0.3m.Angles between consecutive masses = 45, 75 and 135 degrees.

  • (A) 116
  • (B) 58
  • (C) 232
  • (D) 140

A

Admin • 831.35K Points
Coach

Q. Let the disturbing mass be 200 kg and the radius of rotation be 20 cm and the rotation speed be 50 rad/s, then calculate the centripetal force in kN.

  • (A) -50
  • (B) -25
  • (C) -100
  • (D) -2500

Add MCQ in this Category

If you want to share an MCQ question in this category, it's a great idea! It will be helpful for many other students using this website.

Share Your MCQ

Browse Categories

Click on category to learn MCQs of that category.