Pick up the correct statement from the following.
Correct Answer: D. None of these
📚 Detailed Explanation: Three False Statements on Workability
Why D (None of these) is correct — all three statements A, B, C are false:
A — FALSE: “Segregation is necessary for workable concrete” — Segregation is a defect, not a requirement. Proper workable concrete should flow and compact without segregation. Segregation means coarse aggregates separate from mortar, leading to non-uniform, weaker concrete.
B — FALSE: “Consistency does not affect workability” — Consistency IS the measure of workability. They are directly related — a consistent, uniform mix is the basis of good workability.
C — FALSE: “Slump increases → workability decreases” — This is the exact opposite. Higher slump = more fluid = higher workability.
A — FALSE: “Segregation is necessary for workable concrete” — Segregation is a defect, not a requirement. Proper workable concrete should flow and compact without segregation. Segregation means coarse aggregates separate from mortar, leading to non-uniform, weaker concrete.
B — FALSE: “Consistency does not affect workability” — Consistency IS the measure of workability. They are directly related — a consistent, uniform mix is the basis of good workability.
C — FALSE: “Slump increases → workability decreases” — This is the exact opposite. Higher slump = more fluid = higher workability.
Quick Truth Table
| Statement | True/False | Correct Version |
|---|---|---|
| A. Segregation is necessary | FALSE | Segregation is harmful; avoid it |
| B. Consistency doesn't affect workability | FALSE | Consistency directly determines workability |
| C. Higher slump = lower workability | FALSE | Higher slump = higher workability |
- All three common misconceptions are wrong — select “None of these.”
- Higher slump ↔ higher workability: they are positively correlated.