Heat and Mass Transfer
Conduction is a process of heat transfer

From a hot body to a cold body, in a straight line, without affecting the intervening medium
From one particle of the body to another by the actual motion of the heated particles
None of these
From one particle of the body to another without the actual motion of the particles

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Heat and Mass Transfer
The time constant of a thermocouple is

The time taken to attain the final temperature to be measured
Determined by the time taken to reach 100°C from 0°C
The time taken to attain 63.2% of the value of initial temperature difference
The time taken to attain 50% of the value of initial temperature difference

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