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- Subject
- Building Materials and Constructioncivil-engineering-mcqs › building-materials-and-construction
- Published
- 9 Jan 2019
- Last updated
- 28 May 2026
Explanation
Option A is correct because a retarder is used to delay the initial setting time of cement paste in concrete, allowing for extended workability. Option B is incorrect as retarders do not speed up setting. Option C refers to waterproofing, which is unrelated to retarders. Option D relates to workability, but retarders primarily affect setting time rather than mix consistency.
More Building Materials and Construction MCQs
Practice related questions from the same subject.
- 1.What are the benefits of having the correct amount of entrained air in concrete?
- 2.How does cast iron compare to mild steel in terms of compressive and tensile strengths?
- 3.How does double Flemish bond differ from English bond in terms of structure?
- 4.What is the maximum allowable differential settlement for foundations constructed on sandy soils?
- 5.Which type of footing is designed to transfer substantial loads from steel columns to the ground?
- 6.In a collar beam roof, where is the horizontal tie typically located?
- 7.In stair construction, what does the term 'string' refer to?
- 8.What is the minimum recommended number of steps in a flight of stairs?
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