1. There are ________ principal methods for increasing the strength and hardness of a given alloy:
(A) 3
(B) 2
(C) 4
(D) 5
2. The most important heat-treating process for nonferrous alloys is:
(A) Carburizing
(B) Nitriding
(C) Normalizing
(D) Age hardening
3. Cast irons have carbon normally in the range of:
(A) 0% to 1%
(B) 1% to 2%
(C) 1.5% to 4%
(D) 2% to 4%
4. ________ may be defined as plastic deformation of a metal at a temperature below the recrystallization temperature:
(A) Hot working
(B) Heat treatment
(C) Cold working
(D) None of these
5. The ferrous metals, steel or cast irons are essentially an alloy of iron and carbon:
(A) Iron and carbon
(B) Iron and copper
(C) Iron and silver
(D) None of these