2172. The heat treatment process applied to cold formed steel parts is
Normalising
Tempering
Artificial ageing
Solution annealing
✅ The correct answer is option D.
2174. Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
Copper
Copper alloys
Stainless steel
Monel
✅ The correct answer is option C.
2176. Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?
Silicon steel
Chromium steel
Molybdenum steel
None of these
✅ The correct answer is option A.
2178. The material used in the filament of electric bulbs is
Nichrome
Tungsten
Constantan
German silver
✅ The correct answer is option B.
2180. The addition of antimony in tin-based alloys improves its
Rupture strength and hot hardness
Impact strength and bonding strength
Deformation resistance
Wear resistance
✅ The correct answer is option C.
2183. Coke oven walls are lined with __________ bricks.
Silica
Tar-dolomite
Low thermal conductivity
Fire clay
✅ The correct answer is option A.
2146. Nickel as a material of construction
Is used as an alloying element for both ferrous & non-ferrous alloys
Is paramagnetic below 415° C (its Curie temperature)
Dimagnetic
Has a body centred cubic (bcc) crystal lattice structure
✅ The correct answer is option A.
2149. Which of the following metals in not used for coating of the base metal to guard it against corrosion?
Lead
Cadmium
Magnesium
Aluminium
✅ The correct answer is option C.
2152. White cast iron as compared to grey cast iron is
More durable
Very brittle
Very hard
All of the above
✅ The correct answer is option D.
2155. Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of
Nickel
Copper
Stainless steel
Brass
✅ The correct answer is option B.