In a turbine the fluid expands almost A) Isothermally B) Isobarically C) Adiabatically D) None Of Above Related MCQs: When a gas in a vessel expands its internal energy decreases. The process involved is A pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in the ideal refrigeration cycle is The property of a fluid by which its own molecules are attracted is called The normal stress in a fluid will be constant in all directions at a point only if