JNTU
JNTU B.Tech III MECHANICAL WORKING Previous Question Paper (February - 2022 - R16)
Answer any five questions
All questions carry equal marks
Main
Draw the stress strain diagram for a ductile material and explain the following terminology.
Proportional limit
Answer
The proportional limit is the maximum stress at which the material obeys Hooke's Law, meaning stress is directly proportional to strain. In the stress-strain diagram, this corresponds to the point where the initial linear portion of the curve ends.
Elastic limit
Answer
The elastic limit is the maximum stress a material can withstand without undergoing permanent deformation. If the load is removed at or below this point, the material returns to its original shape and dimensions.
Yield point
Answer
Sign in to view the complete answer paper.
Breaking stress
Answer
Sign in to view the complete answer paper.
Explain the Mohr’s circle of stress in three dimensions.
Answer
Sign in to view the complete answer paper.
Explain Von-Mises distortion energy criterion.
Answer
Sign in to view the complete answer paper.
Explain octahedral shear stress and shear strain.
Answer
Sign in to view the complete answer paper.
Explain the closed-die forging process with the help of a neat sketch. Also mention its advantages and limitations.
Answer
Sign in to view the complete answer paper.
Explain the mechanics of metal working for slab method.
Answer
Sign in to view the complete answer paper.
Explain various defects in rolled products and their remedies.
Answer
Sign in to view the complete answer paper.
Explain the wire drawing and deep drawing operations with the help of neat sketches.
Answer
Sign in to view the complete answer paper.