1:2:4, 1:3:6, etc. Are used in which method of volumetric proposition.

1-2-4-1-3-6-etc-are-used-in-which-method-of-volumetric-proposition

1:2:4, 1:3:6, etc. Are used in which method of volumetric proposition.
A. Minimum void method
B. Water-cement ratio method
C. Arbitrary method
D. Finesse modulus method
The correct choice is C. Arbitrary method

In Arbitrary method of volumetric proportions, the proportions of cement are depending on the nature of work for which concrete is required. Thus the general expression for proportions of cement, sand and coarse aggregate is 1:n:2n by volume.