It takes 10 hours to homogenize an alloy at 1273 K. The time required (in hours) to achieve the same extent of homogenization at 1373 K is . . . . . . . .
Given: Diffusivity, D₁₃₇₃ K = 10^-18 m² s^-1 and D₁₂₇₃ K = 10^-19 m² s^-1

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