Engineering Thermodynamics
A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as

Carbonization
Cracking
Fractional distillation
Full distillation

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Engineering Thermodynamics
A closed system is one in which

Mass crosses the boundary but not the energy
Mass does not cross boundaries of the system, though energy may do so
Both energy and mass cross the boundaries of the system
Neither mass nor energy crosses the boundaries of the system

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