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.
1953. Most common stainless steel type 316, which is highly resistant to corrosion contains
16-13% Cr 10-14% Ni and 2-3% Mo
20-22% Cr, and 8-10% Ni
2-4% Cr, 22% NI and 2-4% Mo
None of these
✅ The correct answer is option A.
1956. Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system?
High silicon iron, silicon rubber, Kel-F and teflon
Mild steel and stainless steel
Cast iron, tin and aluminium
Copper, nickel and monel
✅ The correct answer is option A.
1922. Ceramic materials
Are exemplified by clay and mica
Are poor electrical conductors due to lack of free electrons
Never exhibit polymorphism
All of the above
✅ The correct answer is option D.
1925. Which of the following is not an alloy of copper and tin?
Bell metal
Gun metal
Admiralty gun metal
Monel metal
✅ The correct answer is option D.
1928. The range of Mho’s scale of hardness is from
1 to 15
1 to 8
1 to 10
0 to 10
✅ The correct answer is option C.
1931. Generally __________ are subjected to galvanising (i.e., zinc coating).
Non-ferrous metals
Non-metals
Low carbon steels
Stainless steel
✅ The correct answer is option C.
1934. Cermets are __________ materials.
Refractory
Reinforced
Abrasive
Fully metallic
✅ The correct answer is option A.
1937. Which of the following crystal structures characterises the ferritic stainless steel?
Face centred cubic
Body centred cubic
Simple hexagonal
None of these
✅ The correct answer is option B.
1940. Percentage elongation of a material is a measure of its
Ductility
Brittleness
Toughness
Malleability
✅ The correct answer is option A.