1943. __________ is added in low carbon steel to raise its yield point.
Sulphur
Phosphorous
Silicon
Manganese
✅ The correct answer is option D.
1945. Which of the following is not an alloy of tin?
White-bearing metal
Pewter type metal
Soft solder
German silver
✅ The correct answer is option D.
1947. Maximum consumption of copper is in
Utensil manufacture
Electrical industry
Industrial equipment manufacture
Small scale industries
✅ The correct answer is option B.
1949. Acid proof stoneware
Has very low strength
Cannot be heated
Is broken by small temperature changes
All of the above
✅ The correct answer is option D.
1912. Beehive coke ovens are made of __________ bricks.
Silica
Fireclay
Silicon carbide
Corundum
✅ The correct answer is option A.
1914. Silicon percentage in acid resistant cast iron is about
4
8
14
20
✅ The correct answer is option C.
1916. Chilled iron castings are
Easily machinable
Soft on surface
Highly wear resistant
None of these
✅ The correct answer is option C.
1918. Photographic plates are coated with
Silver nitrate
Silver halide
Calcium silicate
Metallic silver
✅ The correct answer is option B.
1920. Nickel (56%) and molybdenum (17%) alloys are called
Monel
Hastealloy C
Inconel
Bronzes
✅ The correct answer is option B.
1923. With increase in carbide/graphite ratio in cast iron, its
Hardness & brittleness increases
Ductility decreases
Both A & B
Neither A nor B
✅ The correct answer is option C.