(A) Orthorhombic
(B) Cubic
(C) Hexagonal
(D) None of these

(A) 2
(B) 4
(C) 6
(D) 8

(A) High alumina ceramic
(B) Metallic carbides
(C) Corundum
(D) Carborundum

(A) Aluminium
(B) Noble metals (Ag, Pt, Au)
(C) Zinc
(D) Alkali metals (K, Na, Li)

(A) Produced by adding 10-20% steel to the cupola charge
(B) Stronger than cast iron
(C) Both (A) and (B)
(D) Neither (A) nor (B)

(A) Cracks and blow holes are eliminated
(B) Ductility and impact strength improves
(C) Appreciable strain hardening is produced
(D) Yield stress, hardness and fatigue strength is not at all affected

(A) Have lower corrosion resistance
(B) Are harder to fabricate
(C) Are less ductile and hence less suitable for cold pressing
(D) All (A), (B) and (C)

(A) Fatigue resistance
(B) Tensile strength
(C) Creep resistance
(D) All (A), (B) & (C)

(A) Copper
(B) Magnesium
(C) Both (A) & (B)
(D) Neither (A) nor (B)

(A) White cast
(B) Grey cast
(C) Wrought
(D) None of these