57) Which among the following is not a precursor for the fabrication of Carbon fibre?

58) The material generally used for making Honeycomb core is

59) Low moisture absorption resin system is

60) Most commercial elastomers are filled with _____ to improve their strength or abrasion resistance while maintaining their extensibility.

61) When the fibers are laid parallel to one-another and saturated or impregnated with resin, a _____ is formed.