Virtual Labs

Heat of hydration of cement

What is the temperature range maintained in the muffle furnace for this experiment?

a: 1000 to 1050°C Explanation

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b: 750 to 800°C Explanation

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c: 900 to 950°C Explanation

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d: 800 to 950°C Explanation

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Which IS code is followed for determining the heat of hydration of cement?

a: IS 4031 Explanation

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b: IS 11262 Explanation

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c: IS 456 Explanation

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d: IS 10262 Explanation

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Why is it necessary to determine the ignition loss of the cement sample?

a: To check the impurities in cement Explanation

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b: To measure the unburnt materials in cement Explanation

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c: To correct the final heat calculations Explanation

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d: To determine setting time Explanation

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What is the function of the calorimeter in this experiment?

a: To measure cement consistency Explanation

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b: To determine heat released during hydration Explanation

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c: To measure the weight of cement Explanation

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d: To check the strength of cement Explanation

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What is the importance of maintaining an insulated environment during the test?

a: To prevent heat loss Explanation

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b: To increase reaction speed Explanation

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c: To ensure hydration stops Explanation

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d: To reduce heat of hydration Explanation

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What happens if the cement sample is not finely ground before testing?

a: Increases hydration Explanation

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b: Slows down hydration Explanation

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c: No effect Explanation

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d: Reduces strength Explanation

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How is the heat capacity of the calorimeter calculated?

a: Using Beckmann readings Explanation

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b: Using weight of cement Explanation

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c: Using water-cement ratio Explanation

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d: Using curing temperature Explanation

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At what intervals should the temperature readings be taken during calorimetry?

a: Every 5 minutes Explanation

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b: Every 2 minutes Explanation

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c: Every 1 minute Explanation

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d: Every 10 minutes Explanation

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How does the hydration process influence the setting time of cement?

a: Higher heat accelerates setting Explanation

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b: Lower heat slows down setting Explanation

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c: Both a and b Explanation

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d: No effect Explanation

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What is the significance of correcting for ignition loss while calculating heat of hydration?

a: To ensure precise results Explanation

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b: To increase heat of hydration Explanation

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c: To check for impurities Explanation

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d: To determine cement composition Explanation

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How much of the total heat is liberated within the first 3 days?

a: 50% Explanation

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b: 35% Explanation

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c: 65% Explanation

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d: 70% Explanation

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Which cement compound is responsible for long-term strength?

a: C₃S Explanation

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b: C₂S Explanation

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c: C₃A Explanation

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d: C₄AF Explanation

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Why is curing necessary after hydration?

a: To maintain moisture Explanation

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b: To increase setting time Explanation

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c: To decrease hydration Explanation

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d: To increase fineness Explanation

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Which type of cement generates the least heat of hydration?

a: Rapid hardening cement Explanation

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b: Low heat cement Explanation

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c: Ordinary Portland cement Explanation

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d: Sulfate resistant cement Explanation

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What is the significance of hydration products?

a: Provide strength and durability Explanation

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b: Reduce workability Explanation

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c: Increase porosity Explanation

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d: None of the above Explanation

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