Generalized compressibility factor chart is a plot of

A.compressibility factor versus reduced temperature with reduced pressure as parameter
B.compressibility factor versus reduced pressure with reduced temperature as parameter
C.compressibility factor versus pressure with absolute temperature as parameter
D.compressibility factor versus absolute temperature with pressure as parameter

Steady flow occurs

A.when the velocity at a given point changes steadily with time
B.when the velocity at a given point does not change with time
C.when the velocity does not change with respect to space
D.when the velocity be changed