Graphite fibres are used to make undirectional Al-matrix composites. Young's modulus of graphite and aluminium are 400 GPa respectively. If a composite contains 60 volume % of fiber and is loaded along the fiber direction, the Youngs Modulus of the composite is . . . . . . . . GPa.

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