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Mechanical Engineering Subjective Question-Answers- 001

Mechanical Engineering Subjective Questions-Answers

Hello friends! Here we are posting few mechanical engineering questions / numerical with explanation asked by visitor/ reader of www.ErForum.net

MECHANICAL-ENGINEERING

Mechanical Questions

1.Q. Discuss the various types of Cam and Follower?

2.Q. Explain the term PISTON EFFORT, CRANK EFFORT, and CRANK PIN EFFORT?

3.Q. Draw the cam profile for a knife-edge follower with the following data     
(i)Cam lift 40 mm during 90° of cam rotation with SHM
(ii)Dwell for next 30°     
(iii)During the next 60° of cam rotates the follower returns to its original position with SHM
(iv) Dwell during the remaining 180°   
The radius of the base circle of the cam is 40mm, Determine the maximum velocity of the follower during its ascent and descent, if cam rotates at 240rpm.

4.Q. The length of the crank and the connecting rod of the horizontal reciprocating engines are 100mm and 50mm respectively.     The crank is rotating at 400rpm. using Klein's construction finds-     
(i)The velocity of the piston     
(ii)Acceleration of piston     
(iii)Angular velocity of connecting rod     
(iv) Angular acceleration of connecting rod When crank has turned 30° from inner dead centre.

5.Q. The maximum and minimum speed of a flywheel is 242 rpm and 238 rpm respectively. The mass of flywheel is 2600 kg and radius of gyration is 1.8m, find-    
(i)The mean speed of the flywheel     
(ii)Mean fluctuation of energy and     
(iii)Coefficient of fluctuation of speed

Download: Answers of all the above Questions

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1 Comments

  1. For a symmetrical tangent cam with a roller follower , the least radius of the cam is 25mm and the roller radius is 18mm.The angle for outward movement is 90degree and total lift is 20mm.The cam shaft runs at 900rpm. Determine principle dimensions of the cam?

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