Drop forging dies contain carbon of the order of_________________?

A. 0.1 to 0.2%
B. 0.25 to 0.5%
C. 0.6 to 0.7%
D. 0.7 to 0.9%

Preheating is essential in welding ___________________?

A. Cast iron
B. High speed steel
C. All non-ferrous materials
D. All of the above

The tensile strength of wrought iron is maximum _________________?

A. Along the lines of slag distribution
B. Perpendicular to lines of slag distribution
C. Uniform in all directions
D. Unpredictable

Which is the false statement about wrought iron. It has________________?

A. high resistance to rusting and corrosion
B. high ductility
C. ability of hold protective coating
D. easily weldable characteristics

Balls for ball bearings are made of_________________?

A. Cast iron
B. Mild steel
C. Stainless steel
D. Carbon-chrome steel

Taps, dies and drills contain carbon________________?

A. Below 0.5%
B. Below 1%
C. Above 1%
D. Above 2.2%

Cold rolled steel sheets contain carbon of the following order___________________?

A. 0.1%
B. 0.2%
C. 0.4%
D. 0.6%

Large forgings, crank shafts, axles normally contain carbon up to________________?

A. 0.05 to 0.20%
B. 0.20 to 0.45%
C. 0.45 to 0.55%
D. 0.55 to 1.0%

Which of the following element results in presence of free graphite in C.I_________________?

A. Carbon
B. Sulphur
C. Silicon
D. Manganese

Blast furnace produces following by reduction of iron ore_______________?

A. Cast iron
B. Pig iron
C. Wrought iron
D. Malleable iron