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EXAM PREPARATION

Objective Question & Answer

QUESTION

Objective Question

Q.1
Lime is mixed with brick earth to
ईंट की मिट्टी में चूना मिलाया जाता है ताकि:
A
Impart plasticity

लचीलापन (प्लास्टिसिटी) आ सके

B
Increase durability

टिकाऊपन बढ़ सके

C
Prevent shrinkage

सिकुड़न को रोका जा सके

D
Increase impermeability

अभेद्यता (इंपरमीबिलिटी) बढ़ सके

Answer ( Option C)

Prevent shrinkage

सिकुड़न को रोका जा सके

Solution

lime (less than 5%) is mixed with good brick earth primarily to prevent the shrinkage of raw bricks during the drying and

burning processes. It also acts as a flux, causing the silica to melt at a lower temperature and binding the brick particles

together for improved strength.

अच्छी ईंट-मिट्टी में चूना (5% से कम) मिलाया जाता है, जिसका मुख्य उद्देश्य कच्ची ईंटों को सुखाने और पकाने की प्रक्रिया के दौरान उनमें

सिकुड़न को रोकना है। यह एक 'फ्लक्स' के रूप में भी काम करता है, जिससे सिलिका कम तापमान पर पिघल जाती है और ईंट के कण आपस में

अच्छी तरह जुड़ जाते हैं, जिससे ईंट की मजबूती बढ़ती है।

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