Engineering MCQs

In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien’s acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO. The acceleration of the piston P with respect to the crankpin C is given by

by
ω2 x NO
ω2 x CO
ω2 x CN
ω2 x QN
✅ The correct answer is option C.

The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

by
it is subjected to a higher stress than the outer side
it is subjected to a higher cyclic loading than the outer side
it is more stretched than the outer side during the manufacturing process
it has a lower curvatu
✅ The correct answer is option B.