Which of the following is a parameter to be checked before choosing the shape of the pitch in heat exchangers?

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Which of the following is true about Plate heat exchangers?

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Which of the following is untrue about scraped surface heat exchangers?

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Which of the following heat exchangers are used for the quick exchange of heat?

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Statement 1: Scraping improves heat transfer co-efficient by 5 times in case of non-Newtonian fluids. Statement 2: In food industry, major physical changes to food items when they’re processed, take place like transformation from Newtonian to Non-Newtonian fluids. Hence, scraped surface heat exchangers are very beneficial.

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Contamination takes place to high extend in Plate heat exchangers.

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Statement 1: Plate heat exchangers are used in heat sensitive foods like milk. Statement 2: Principle behind plate heat exchangers is that there is very less space between the plates and hence quick heating can take place.

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Statement 1: In a rising film evaporator, the feed can be very viscous. Statement 2: In a rising film evaporator, the feed cannot be heat sensitive.

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If _______ heating has higher heat transfer rates than _______ heating, then why is ________ difficult to be used.

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Statement 1: Forward feeding requires pumps for the feed at every step. Statement 2: In a backward feeding arrangement, the most concentrated feed is exposed to the maximum steam in order to remove heat. This is its advantage.

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In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference.

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Statement 1: Cabinet tray dyers can be used for heat sensitive materials. Statement 2: Bin dryer is used for materials which follow the falling rate drying curve.

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Statement 1: In coiled heat exchanger, the coils can be present inside and outside the vessel. Statement 2: The coils can have either hot/cold fluid present inside them or even electrical coils can be present.

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Which of the following is an advantage of using pumps as heat transfer equipment?

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Penetration depth of food refers to the depth inside the food inside which the heat generation drops to 37%.

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Statement 1: In microwave heating, heat is not applied to the food item. Statement 2: Radiation doesn’t gives even drying whereas microwave heating does.

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Statement 1: Difference between 1-1 and 1-2 heat exchanger is that 1-2 has both counter AND co current, whereas 1-1 has only co-current. Statement 2: 1-2 heat exchanger requires a high pressure drop.

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Statement 1: Evaporation is considered a mass and heat transfer operation. Statement 2: After evaporation, solids are left behind.

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In plate evaporator, the heat transfer coefficient is high in spite of low residence time because _____

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In a packaging of dry grapes, the packaging material is made of polyethylene. The dry grapes have certain moisture content. Which of the following is true with respect to the diffusion of certain amount of moisture through the packing?

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At a food processing industry, the steam was re-compressed and a small amount of steam at high pressures and temperatures was sent into the next evaporation chamber in a multiple effect evaporator. Which of the following is true with respect to the above sentences?

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Which of the following is untrue? (a)It is difficult to predict the electric field intensity inside a food material

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Coffee powders can be made from which of the following dryers?

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Industry A is low on budget and is used in the sugar industry. Industry B wants to invest in a good evaporator. They are needed for meat extracts. Which evaporators will you suggest for each of them?

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Which of the following dryers cannot take a feed in the form of pastes/slurries/sticky items?

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