Cement Testing MCQ with answer and solution

Concept

Fineness of cement is tested by sieve test, Blaine's air permeability test or Wagner turbidimeter.

Step-by-step solution

1. Fineness means the size of cement particles. 2. Tests: 90 micron sieve test, Blaine air permeability test, Wagner turbidimeter. 3. Among the options, only the air permeability apparatus tests fineness.

Explanation

Fineness is found from the specific surface of cement. The Blaine air permeability apparatus measures this. The other instruments test other properties.

Why the other options are wrong

A: Le-Chatelier is for soundness. B: Vicat needle is for consistency and setting time. D: Slump cone is for workability of concrete.

Shortcut

Fineness = Blaine / air permeability / sieve.

Common mistake

Choosing Vicat apparatus because it is the most famous cement test.