Dilute acidic
Concentrated acidic
Alkalis & alkaline
None of these
✅ The correct answer is option C.
Engineering
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1982. Liquid ammonia is shipped in __________ containers.
Steel
Aluminium
Glass
Lead lined
✅ The correct answer is option C.
1983. Monel metal is an alloy of
Molybdenum and nickel
Nickel and copper
Molybdenum and aluminium
Molybdenum and zinc
✅ The correct answer is option B.
1984. Duralumin is an alloy of
Aluminium, copper and manganese
Aluminium, nickel and silicon
Aluminium and nickel
None of these
✅ The correct answer is option A.
1985. In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of
Stainless steel
Cast iron
Lead lined steel
Rubber lined steel
✅ The correct answer is option B.
1986. Hydrochloric acid is __________ corrosive to common metals.
Least
Not
Mildly
Highly
✅ The correct answer is option D.
1987. Addition of tungsten to steel imparts
Magnetic properties
Cutting hardness
Corrosion resistance
Ductility
✅ The correct answer is option B.
1988. Cementite is
Fe₃C chemically
A compound of carbon and iron
Characterised by an orthorhombic crystal structure
All of the above
✅ The correct answer is option D.
1989. Which of the following has a very high carbide forming tendency in steels?
Silicon
Chromium
Nickel
Vanadium
✅ The correct answer is option D.
1990. Bog iron used for the adsorption of H?S from coke oven gas is
An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
Iron impregnated with resin (usually bakelite)
Carbon free iron
None of these
✅ The correct answer is option A.