2065. The hardest material just prior to diamond in Mhos scale is
Topax
Carborundum
Corrundum
Calcite
✅ The correct answer is option C.
2068. Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.
Beryllium
Manganese
Copper
Iron
✅ The correct answer is option B.
2071. Reactor used in the production of polyvinyl chloride (PVC) is made of
Nickel or glass lined steel
Aluminium
Tantalum
Lead
✅ The correct answer is option A.
2074. Bearings subjected to light load are made of
White metal
Phosphorous bronze
Monel
Silicon bronze
✅ The correct answer is option B.
2077. Rubber lined pumps can be used to pump
Caustic soda
Chlorinated brine
Hypochlorous acid
All of the above
✅ The correct answer is option D.
2080. Hardest material so far found is
Diamond
Graphite
Carborundum
Pumice stone
✅ The correct answer is option A.
2083. The most distinguished property of malleable cast iron is its high
Ductility
Hardness
Malleability
None of these
✅ The correct answer is option A.
2086. Amount of energy that a material can absorb before its fracture is a measure of its
Toughness
Resilience
Malleability
Ductility
✅ The correct answer is option A.
2088. Out of the following, copper vessels are the most suitable for the storage of
Bromine
Dry chlorine & dry fluorine
Nitric acid (95% and fuming)
Phosphoric acid (95%) & sulphuric acid (95% and fuming)
✅ The correct answer is option B.
2090. Material of construction of pipe generally used for conveying water in India is
Stainless steel
Cast iron
Wrought iron
Lead lined steel
✅ The correct answer is option B.