ईंट बनाने वाली प्रत्येक मिट्टी का मुख्य घटक निम्नलिखित में से कौन-सा है, जो आमतौर पर इसका 20% से 30% हिस्सा होता है?

The internal size of a mould used in brick manufacturing is kept:

The standard number of modular bricks required per cubic meter of brick masonry is:

Which of the following lightweight volcanic or expanded mineral aggregates is commonly used to manufacture lightweight concrete blocks for partition walls?