Workability of concrete mix with low water cement ratio is determined by

For ensuring quality of concrete, use

The process of keeping concrete moist for a certain period after its finishing, is known as

Concrete is unsuitable for compaction by a vibrator if it is

The top diameter, bottom diameter and the height of a slump mould are:

Water-cement ratio is, usually, expressed in

Transport of concrete by pumps, is done for a distance of

The ratio of the volume of moist sand to the volume of dry sand is known as