1. . How much carbon is present in cast irons?
(A) Less than 0.05%
(B) Up to 1.5%
(C) 1.5% to 2%
(D) More than 2%
2. . Cast iron is a _____ alloy.
(A) Eutectic
(B) Eutectoid
(C) Peritectic
(D) Peritectoid
3. . What kind of steel requires definite amounts of other alloying elements?
(A) Carbon steel
(B) Alloying steel
(C) Stainless steel
(D) Tool steel
4. . Which of these is not a function of alloy steels?
(A) Increases strength
(B) Improves ductility
(C) Reduces cost
(D) Improves machinability
5. . What does AISI steel stand for?
(A) American-Indian Steel Institute
(B) American-Indian Society of Iron
(C) American Iron and Steel Institute
(D) Alloys, Iron and Steel Institute
6. . Steels containing more than 5% of one or more alloying elements are known as ________
(A) HSLA steels
(B) High alloy steels
(C) Tool and die steels
(D) Stainless steels
7. . Which element causes cementite to behave in a stable manner?
(A) Silicon
(B) Sulphur
(C) Manganese
(D) Carbon
8. . What is the effect of phosphorus and sulphur in cast irons?
(A) Induces brittleness
(B) Increases strength
(C) Destabilizes cementite
(D) No effect
9. . Which of the following materials has maximum strength?
(A) Grey cast iron
(B) Plain carbon steel
(C) Alloy steel
(D) Aluminum alloy
10. . Steels used for automobile bodies and hoods are
(A) Medium carbon steel
(B) Mild steel
(C) High carbon steel
(D) Alloy steel