241. __________ is added in low carbon steel to raise its yield point.
Sulphur
Phosphorous
Silicon
Manganese
✅ The correct answer is option D.
Materials and Construction MCQs
242. The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.
Brass for low
Nickel alloys for high
Both A & B
Aluminium for all
✅ The correct answer is option C.
243. 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.
244. Nickel made/clad equipments are suitable for handling
Ammonia (both aqueous & anhydrous)
Fruit juices, milk & its products and caustic soda solution
Nitric acid & hydrochloric acid (conc)
Sulphuric acid (conc)
✅ The correct answer is option B.
245. Maximum consumption of copper is in
Utensil manufacture
Electrical industry
Industrial equipment manufacture
Small scale industries
✅ The correct answer is option B.
246. Which of the following mechanical properties of a material is most structure insensitive?
Modulus of elasticity (young
Toughness
Percentage reduction of area
Tensile strength
✅ The correct answer is option A.
247. 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.
248. __________ steel is widely used for the manufacture of motor car crankshafts.
Silicon
Nickel
Chrome
High speed
✅ The correct answer is option C.
249. Beehive coke ovens are made of __________ bricks.
Silica
Fireclay
Silicon carbide
Corundum
✅ The correct answer is option A.
250. Carbon content in steel is __________ percent.
0.1-2
4-Jun
2-Apr
0.001-0.01
✅ The correct answer is option A.