GATE CE 2019 Set 2 — Question 41
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.MCQ+2 / -0.67MediumCement PropertiesConstruction MaterialsStructural EngineeringDurability of Concrete
Structural Engineering → Construction Materials → Cement Properties
Last updated
Question
In the context of provisions relating to durability of concrete, consider the following assertions:Assertion (1): As per IS 456-2000, air entrainment to the extent of 3% to 6% is required for concrete exposed to marine environment.Assertion (2): The equivalent alkali content (in terms of equivalent) for a cement containing 1% and 0.6% of and , respectively, is approximately 1.4% (rounded to 1 decimal place).Which one of the following statements is CORRECT?
Correct answer
(A) Assertion (1) is FALSE and Assertion (2) is TRUE
Solution
Step 1: Evaluate Assertion (1). According to IS 456-2000, Clause 8.2.4.1, air entrainment is specifically recommended for concrete exposed to freezing and thawing conditions, not as a general requirement for all marine environments. Therefore, Assertion (1) is FALSE.Step 2: Evaluate Assertion (2). The equivalent alkali content is calculated using the formula:Given and :Therefore, Assertion (2) is TRUE.Conclusion: Assertion (1) is FALSE and Assertion (2) is TRUE.
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE CE question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Construction Materials
2026 Set 1 Q13A thin-walled spherical gas balloon of radius and wall thickness () is subjected…2026 Set 2 Q14A rectangular singly reinforced concrete beam has a width of 300 mm and an effective depth of 550…2026 Set 1 Q14Black dot shown in the figure qualitatively represents the shear centre of the angle section. The…2026 Set 2 Q15As per IS:800-2007, design of a cantilever steel beam section for its moment capacity requires…2026 Set 1 Q15Which one of the following is utilized to determine the long-term deformation of concrete under…