High-co-efficient of friction between journal and bearing
Ability to retain lubricant on its surface
Low co-efficient of friction between journal and bearing
Both B & C
✅ The correct answer is option A.
Engineering
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1822. Graphite is corroded by
Sulphuric acid (10%)
Sea water
Hydrochloric acid
None of these
✅ The correct answer is option D.
1823. The ‘bomb’ in the bomb calorimeter is made of
Molybdenum stainless steel
Mild steel
High silicon iron (14% Si)
Copper
✅ The correct answer is option A.
1824. The maximum percentage of chromium that can be added to steel is about
12
18
24
30
✅ The correct answer is option B.
1825. Babbit metals used for making bearings are
Tin or lead based alloys
Short of antifrictional properties
Having homogenous microstructure
Yellow metals
✅ The correct answer is option A.
1826. Constantan used in thermocouples is an alloy of
Iron & copper
Copper & aluminium
Lead & tin
None of these
✅ The correct answer is option D.
1827. Hammers and railway rails are normally made of
Mild steel
Dead mild steel
Medium carbon steel
High carbon steel
✅ The correct answer is option D.
1828. Very high sulphur in pig iron makes
Its casting unsound
Its hard and machinable
Its brittle and malleable
All of the above
✅ The correct answer is option A.
1829. Cast iron is
Used for making shock resisting parts
Manufactured in cupola and is brittle
Having compressive strength more than its tensile strength
All of the above
✅ The correct answer is option D.
1830. Tin coating on metals is not done by
Spraying
Powder metallurgy
Hot dipping
Electro-deposition
✅ The correct answer is option B.