2001. A material capable of undergoing large permanent deformation, when subjected to tension is termed as
Friable
Ductile
Brittle
None of these
✅ The correct answer is option B.
Chemical Engineering
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2002. For platinum thermocouples, lead wires are made of
Copper & copper-nickel alloys
Copper & iron
Iron & nickel
Tin & nickel
✅ The correct answer is option A.
2003. Which of the following is not an alloy of copper?
Muntz metal
Admirability gun metal
German silver
Pewter metal
✅ The correct answer is option D.
2004. Graphite is a good
Thermal & electrical insulator
Conductor of heat
Conductor of electricity
Both B & C
✅ The correct answer is option D.
2005. Ability of a material to absorb energy in deformation in the plastic range is characterised as its
Ductility
Toughness
Creep
Resilience
✅ The correct answer is option B.
2006. Aluminium as a material of construction suffers from the disadvantage of
Very high cost
Rather low tensile strength
Very low strength to weight ratio
Scarce availability
✅ The correct answer is option B.
2007. Hastelloy C is a good material of construction in chemical process industry, since it is
Highly corrosion resistant and is readily fabricated
Relatively inexpensive although it can be fabricated with some difficulty
Corrosion resistant to most alkalis, particularly because of its coper content
Light and resists attack by acids
✅ The correct answer is option D.
2008. Lead pipe is
Especially resistant to solutions containing H₂SO₄
Usually joined by burning (e.g. by melting to adjacent pieces with a torch)
Having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain
All of the above
✅ The correct answer is option D.
2009. Constantan is an alloy of
Cu (55%) & Sn (45%)
Cu (55%) & Ni (45%)
Pt (95%) & Rh (10%)
Fe (80%) & Ni (20%)
✅ The correct answer is option B.
2010. An elastic behaviour of materials is expressed in terms of
Hysterisis loop area
Stress-strain curve
Relaxation time
None of these
✅ The correct answer is option C.