MECHANICAL ENGINEERING SUBJECTIVE QUESTIONS-001

MECHANICAL ENGINEERING SUBJECTIVE QUESTIONS WITH EXPLANATION - 001


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

MECHANICAL-ENGINEERING



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

Ans:
CAM-FOLLOWER



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

Ans:
PISTON


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 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 followerduring its ascent and descent, if cam rotates at 240rpm.

Solution: 
KNIFE-EDGE-FOLLOWER


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 find-     (i)Velocity of 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.

 Solution:
CONNECTING-ROD

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

Solution:
FLYWHEEL
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