1694. __________ moulding process can not be used for thermoplastic plastics.
Compression
Extrusion
Injection
None of these
✅ The correct answer is option C.
1695. Nickel is a __________ material.
Ferromagnetic
Diamagnetic
Paramagnetic
None of these
✅ The correct answer is option A.
1696. Cast iron vessels are not suitable for the storage of
Freon
H₂SO₄ (95%) at room temperature
H₂SO₄ (fuming)
Wet SO₂
✅ The correct answer is option D.
1697. Mercury is transported in metal containers made of
Aluminium
Iron
Lead
Nickel
✅ The correct answer is option B.
1699. Most suitable material for high pressure vessel operating at 500 atm. and 500° C is
Molybdenum stainless steel
18/8 stainless steel
Mild steel
High silicon iron (14% Si)
✅ The correct answer is option A.
1701. Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
Corrosion resistance
Tensile strength
Machinability
Compressive strength
✅ The correct answer is option C.
1703. Manganese in steel affects its
Ductility
Tensile strength
Hardness
None of these
✅ The correct answer is option B.
1705. Zinc is highly __________ at room temperature.
Ductile
Resistant to atmospheric corrosion
Malleable
Brittle
✅ The correct answer is option B.
1707. Pure nickel is
Ferromagnetic above its curie point (i.e., 415°C)
Having h.c.p. crystal lattice
Ferromagnetic at room temperature
Not resistant to oxidation at high temperature
✅ The correct answer is option C.
1709. Which of the following is the lightest of engineering metals?
Magnesium
Aluminium
Titanium
Tin
✅ The correct answer is option A.