Lime MCQ with answer and solution

Concept

Uses of lime in construction as an alternative to cement.

Step-by-step solution

1. Understand the properties of lime mortar and lime concrete. 2. Lime provides good workability, plasticity, and breathability, making it ideal for low-strength masonry mortars and plasters. 3. It can also be used in lean concrete mixes where high structural strength is not a primary requirement. 4. Local availability makes it a cost-effective alternative in many regions. 5. Therefore, all the given statements are correct.

Explanation

Lime is traditionally used in various construction works where high early strength is not required. It is suitable for lean concrete mixes, plastering, and mortars requiring low to moderate strength, and is often chosen when it is locally available and economical compared to cement.

Why the other options are wrong

A: Lime is suitable for lean concrete mixes. B: Lime mortars and plasters inherently possess lower strength than cement mortars. C: Local availability often dictates the choice of lime over cement in rural or traditional constructions.

Shortcut

When multiple plausible use-cases are listed for a traditional material like lime (low strength, lean mixes, local availability), 'All of these' is very frequently the correct option in civil engineering exams.

Common mistake

Assuming lime is completely obsolete and cannot be used in lean concrete or mortars.