Category: Materials and Construction

A. Caustic soda solution
B. Phosphoric acid
C. Sulphuric acid (10%)
D. None of these

A. Dilute H2SO4
B. Dilute HNO3
C. Dilute HCl
D. Hydrofluoric acid

A. Case hardening
B. Spheroidising
C. Normalising
D. Annealing

A. Normalising
B. Stress relieving
C. Tempering
D. Solution annealing

A. Harden the surface
B. Increase its glossiness and lustre
C. Prevent the action of water
D. Prevent the action of oxygen

A. Steel
B. Cast iron
C. Brass
D. Gun metal

A. Do not require heat treatment for any of its applications
B. Are used for leaf and coiled springs
C. Do not have good resilience properties
D. Is tempered at 850°C

A. Extrusion
B. Cold working
C. Forging
D. Electroforming

A. Mild steel
B. Dead mild steel
C. Medium carbon steel
D. High carbon steel

A. Is very costly
B. Corrodes easily
C. Is having low creep strength
D. None of these