6. A Body that has been stressed to beyond its elastic limit will not entirely resume its original form on removal of the force, but will have some degree of permanent Deformation. What is this known as?
(a) Flexi-formed
(b) Permanent set
(c) Unrecycble
(d) Maxi-stressed (1)

7. Name the type of material used to distribute Ropes.
(a) Hemp
(b) Cotton
(c) Mixtures of Cotton and nylon
(d) All of the above (1)

8. Some materials (e.g. clay and wax) have practically no tendency to resume their original forms after a stressing force has been removed. What are these Materials said to be?
(a) Ground resources
(b) Plastic
(c) Soft materials
(d) Unknown (1)

9. An effective blasting method is:
(a) water blasting
(b) air blasting
(c) fire blasting
(d) none of the above (1)

10. The process for cleaning articles by rotating them in a cylinder together with Materials is called:
(a) Spinning
(b) dry cleaning
(c) Tumbling
(d) washing