Which sequence of steps is correct for the manufacture of cement ?
Correct answer: C. crushing grinding mixing heating
- A. crushing heating mixing grinding
- B. crushing mixing heating grinding and mixing
- C. crushing grinding mixing heating
- D. mixing heating grinding crushing
Explanation
Cement manufacture proceeds by crushing the raw materials, grinding them, mixing the ground material to obtain a uniform composition, and heating it in the rotary kiln. This gives crushing, grinding, mixing and heating, represented by c. Students may choose b because mixing occurs before heating, but the sequence incorrectly places heating before the final grinding step described there.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Exothermic and Endothermic Reactions
Exothermic reactions release heat to the surroundings and have negative enthalpy change, while endothermic reactions absorb heat and have positive enthalpy change. The topic uses energy profiles to identify reactants, products and activation energy, and includes bond energy, enthalpy diagrams, calorimetry and Hess's law for calculating overall heat changes.
Practise Thermochemistry and Energetics of Chemical Reactions
728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Exothermic and Endothermic Reactions questions
The composition of mixture of clay and lime stone in the raw for cement material is __________________?
The important function of burning zone in the rotary kilm is __________________?
Argillaceous material does not include________________?
Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ?
Cement is a mixture of________________?
When enthalpy of reactants is higher than product then reaction will be_________________?