engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Internal Combustion Engine Cooling and Lubrication

निम्नलिखित में से कौन सा किसी भी स्नेहक का सबसे महत्वपूर्ण गुण है?

1
श्यानता
2
विशिष्ट गुरुत्व
3
Specific heat
4
Emulsification
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