Q. Statement 1: Batch crystallizers are used if the throughput is high.
Statement 2: The operating cost of batch crystallizers is high.

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Q. Statement 1: Batch crystallizers use the concept of cooling of hot solution/magma.
Statement 2: Control of particle size is poor in a batch crystallizer.

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Q. Statement 1: Batch crystallizers are used for jaggery.
Statement 2: Particle size is controlled by stirring and scraping the concentrate from the vessel for better heat transfer.

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Q. Scraped surface crystallizers can be used for viscous fluids up to 10000 cp.

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Q. Which of the following is true about scraped surface crystallizers?

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Q. Statement 1: Forced circulation liquid evaporator-crystallizer has good CSD control.
Statement 2: Draft tube baffle crystallizer is flash evaporated for crystallization.

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Q. Work of Draft tube in Draft tube baffle crystallizer is _____

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Q. Advantage of Draft tube baffles crystallizer _____

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Q. Secondary nucleation involves the collision of crystals.

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Q. Draft tubes _____ crystal-crystal attrition. Crystals _____ bottom.

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Q. High residence time encourages _____

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Q. Heating on the surface of a heat exchanger leads to fouling.

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Q. What does excess supersaturating followed by cooling lead to?

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Q. Excess nucleation leads to _____

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Q. Incrustation leads to _____

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Q. Statement 1: Incrustation may lead to under deposit-corrosion.
Statement 2: Scrapers can be used as an agitated medium to avoid incrustation.

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Q. Automated valves should be avoided.

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Q. Statement 1: T-joints in pipelines for crystallization should be avoided as much as possible.
Statement 2: Thin liquids should have a slope to drain off liquid.

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Q. In making of cocoa butter via crystallization, liquid is the desired product.

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Q. Which of the following needs to be taken care of during scale up of crystallizers?

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