1913. Carbon content in steel is __________ percent.
0.1-2
4-Jun
2-Apr
0.001-0.01
✅ The correct answer is option A.
1915. An alloy of iron containing 4% carbon is called
High carbon steel
Wrought iron
Mild steel
None of these
✅ The correct answer is option D.
1917. Lead is
Not resistant to corrosion
Used as a cathodic material
Not used as pigment (in its compound forms) for paints
Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
✅ The correct answer is option D.
1919. Monel alloy is
The costliest of all the alloys of nickel
Not suitable for making kitchen utensils
Used for making steam valves and turbine blades as it resists steam attack at high temperature
Not used in cast and wrought forms
✅ The correct answer is option C.
1921. The purpose of nitriding the steel is to
Harden its surface
Soften its surface
Improve its reliability
None of these
✅ The correct answer is option A.
1924. Presence of high amount of silicon in cast iron
Suppresses the decomposition of Fe₃ C
Increases the formation of graphite
Increases the contraction of the metal
Reduces its fluidity
✅ The correct answer is option B.
1927. Which one is remelted and poured into moulds to get cast iron?
Wrought iron
Pig iron
Low carbon steel
Mild steel
✅ The correct answer is option B.
1930. Which of the following has the poorest wel-dability?
Low carbon steel
Mild steel
Wrought iron
High-carbon steel
✅ The correct answer is option D.
1933. Corrosion involves exchange of electrons in __________ corrosion.
Chemical
Electrochemical
Both A & B
Neither A nor B
✅ The correct answer is option C.
1936. Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of
Brass
Copper
High carbon steel
Aluminium
✅ The correct answer is option A.