2078. Most of the common metals have __________ crystal structure.
Cubic
Hexagonal
Orthorhombic
None of these
✅ The correct answer is option A.
2081. __________ is added in stainless steel to prevent inter crystal corrosion.
Vanadium
Niobium
Chromium
Nickel
✅ The correct answer is option B.
2084. A magnetic material becomes __________ above the Curie temperature.
Ferromagnetic
Diamagnetic
Paramagnetic
None of these
✅ The correct answer is option C.
2087. Corrosion resistance of steel is increased by the addition of
Phosphorous and tungsten
Nickel and chromium
Lead and vanadium
Molybdenum and tungsten
✅ The correct answer is option B.
2089. In hot wire aneomometer used for gas flow measurement, the wire is normally made of
Copper
Platinum
Constantan
Chromium
✅ The correct answer is option B.
2091. Aqueous nitric acid is stored in __________ vessel.
Plain carbon steel
Stainless steel
Cast iron
Thermosetting plastic material
✅ The correct answer is option C.
2093. Interchain forces are the weakest in case of
Plastics
Fibres
Elastomers
Both rubber & elastomers
✅ The correct answer is option D.
2095. A steel alloy containing 36% nickel is called __________ , which has a zero co- efficient of expansion.
Austenitic stainless steel
Heat resisting steel
Invar
High speed steel
✅ The correct answer is option C.
2097. In a plate type heat exchanger, heat transfer plates are never made of
Stainless steel
Cast iron
Titanium
Hastealloy C
✅ The correct answer is option B.
2099. In SO₃ absorber (Contact Process), packing material used is of
Cast iron
Chemical stoneware
Karbate
Mild steel
✅ The correct answer is option B.