2039. Slow and progressive deformation of a material with time under constant stress is called
Creep
Erosion
Resilience
None of these
✅ The correct answer is option A.
2041. Cold worked steel parts are normally subjected to
Normalising
Hardening
Annealing
Shot peening
✅ The correct answer is option C.
2042. Which of the following stainless steels is non-magnetic?
Ferritic
Martensitic
Austenitic
None of these
✅ The correct answer is option C.
2044. With increase in the carbon percentage in the steel, its
Hardness increases
Ductility reduces
Tensile strength increases
All of the above
✅ The correct answer is option D.
2046. Ferric stainless steels compared to austenitic stainless steels
Have lower corrosion resistance
Are harder to fabricate
Are less ductile and hence less suitable for cold pressing
All of the above
✅ The correct answer is option D.
2049. Containers made of high silicon cast iron (14% Si) are not suitable for the storage of
Acetic acid
Benzoic & boric acids
Phosphoric acid (95%) & sulphuric acid (95%)
Hydrochloric acid (concentrated)
✅ The correct answer is option D.
2052. Cold work tool steel should have
High toughness
Poor hardenability
High wear resistance
All of the above
✅ The correct answer is option C.
2055. Galvanised iron is
Harder
Protected from rusting
Alumina coated iron
None of these
✅ The correct answer is option B.
2058. The material of construction of bearings is
Cast iron
Babbit metal
Pig iron
Steel
✅ The correct answer is option B.
2061. Tank furnace used for melting of glass is made of
Mild steel
Cast iron
Refractory blocks
Stainless steel
✅ The correct answer is option C.