A body starts yielding when it is subjected to stress state with principal stresses of 250 MPa, 50 MPa and - 50 MPa. What is the yield strength of the material. in MPa, if Tresca yield criterion is obeyed?

The extending the polymer chain by successive addition of monomers units is called

A. Propagation

B. Termination

C. Both A and B

D. None of these

Dacron is an example of

A. polyamides

B. polypropene's

C. polyacrylnitrfle

D. polyesters

If Reynolds number is greater than 1, then the

A. Viscous force is larger than the inertia force

B. inertia force is larger than the viscous force

C. inertia force is larger than the surface tension force

D. inertia force is larger than the gravitational force

Which is the correct (degree) temperature range for spherodized carbide in low carbon steel

A. 750-950°C

B. 950-1150°C

C. 550-750°C

D. None of these