72) Which among the following properties is not desirable in a good lubricant ?
Flash point and fire point should be low
KPSC Water Resource Department Junior Engineer Mechanical Question Paper 2017 with Answer Key
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Worm and worm wheel
Volume
Extensive properties The properties of the system, whose value for the entire system is equal to the sum of their values for the individual parts of the system, are called extensive properties.
For example, total volume, total mass and total energy of a system are extensive properties.
Intensive properties The properties of the system, whose value for the entire system is not equal to the sum of their values for the individual parts of the system, are called intensive properties.
For example, temperature, pressure and density of a system are intensive properties.
Zeroth law of thermodynamics
Zeroth law of thermodynamics : Zeroth law of thermodynamics states that, when two bodies are in thermal equilibrium with a third body. They are also in thermal equilibrium with each other.