A ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. sieve No. 9, more than

The workability of concrete is defined as the

An aggregate having all the pores filled with water but having dry surface is called

Harshness in concrete is due to the excess of

The test conducted in the laboratory on the specimen made out of trial concrete mix is called

The most useless aggregate is one whose surface texture is

The rule of water cement ratio was established by

For continuous transportation of concrete, the method used is