1. Which of the following metals cannot be produced by aqueous electrolysis?
(A) Zinc
(B) Copper
(C) Gold
(D) Aluminium

Answer: (D) Aluminium

2. The carbon content of low carbon, medium carbon and high carbon steel are respectively.
(A) (0-0.1)%; (0.1 – 0.4)% and (0.4 – 1.8)%
(B) (0.25-0.4) %; (0.4 – 0.7)% and (0.7 – 1.7)%
(C) Upto 0.25%; (0.25-0.65)% and (0.65 – 1.7)%
(D) None of these

Answer: (C) Upto 0.25%; (0.25-0.65)% and (0.65 – 1.7)%

3. Fracture stress for a brittle material having a crack length of 1 µm is 200 MPa. Fracture stress for the same material having a crack length of 4 µm is
(A) 200 MPa
 (B) 150 MPa
(C) 100 MPa
(D) 50 MPa


4. In blast roasting of copper ore, which of the following is blown through a layer of ore that
is on a moving grate.
(A) Air and oxygen
(B) Oxygen and steam
(C) Air
(D) Oxygen

Answer: (D) Oxygen

5. The riser is designed such that the melt in the riser solidifies
(A) Before casting solidifies
(B) At the same time as casting solidifies
(C) After casting solidifies
(D) Irrespective of the solidification of the casting


 6. Superalloys are
(A) Ni-based alloys
(B) Cu-based alloys
(C) Al-based alloys
(D) Mg-based alloys

Answer: (A) Ni-based alloys

7. The property of a material that CANNOT be significantly changed by heat treatment is 
(A) Yield strength 
(B) Ultimate tensile strength 
(C) Ductility 
(D) Elastic modulus

8. In eutectoid Plain carbon steel, which one of the following structures does NOT form
during continuous cooling?
(A) Fully bainitic
(B) pearlitic + bainitic
(C) Fully pearlitic

Answer: (A) Fully bainitic

9. The manufacturing process used for producing large curved disc is
(A) Stretch forming
(B) Forging
(C) Rolling
(D) Drawing

Answer: (A) Stretch forming

10. The phenomenon of dislocations developing a low energy configuration on
annealing is known as.
(A) Crystallization
(B) Polymerization
(C) Polygonization
(D) Homogenization

Answer: (C) Polygonization

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