Q. How is biogas prepared?

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Q. What is the maximum permissible amount of ash on carbonization after coal is washed?

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Q. What is the solid residue that remains after heating of coal in the absence of air?

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Q. What is the level of fineness to be achieved in crushed coal?

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Q. For how long must coke be burnt?

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Q. What is the appearance of oven coke?

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Q. Which of the following factors are not used to evaluate the quality of coke?

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Q. Which of the following is not an advantage of coke over coal?

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Q. What is the temperature at which low-temperature coke is prepared?

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Q. What is high-temperature coke used for?

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Q. ________ is produced due to a chemical reaction between two or more substances.

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Q. Neoprene was originally known as ________

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Q. Which of the following is not an application of synthetic resins?

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Q. What is Portland cement primarily composed of?

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Q. At what temperature is limestone heated to make Portland cement?

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Q. The hardening process of Portland cement is known as _______

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Q. After burning of raw materials, Portland cement involves blending with ______

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Q. Which of the following cement are not used as a cement replacement?

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Q. What is the specific gravity of Portland cement?

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Q. White Portland cement is obtained due to sintering at _______

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