Q. Which of the following is untrue?

View solution

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

View solution

Q. Which of the following is true about loss factor of food?

View solution

Q. Which of the following is a synonym for loss factor of food?

View solution

Q. Which of the following is true about Plate heat exchangers?

View solution

Q. 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.

View solution

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

View solution

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

View solution

Q. 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.

View solution

Q. Statement 1: Generally, in small scaled jacketed pans, food products like jams, sauces etc are made.
Statement 2: Baffles provide structural support to tubes, but they cannot prevent channeling.

View solution

Q. 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.

View solution

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

View solution

Q. 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.

View solution

Q. Contamination takes place to high extend in Plate heat exchangers.

View solution

Q. External heat exchangers are gaining popularity as they’ve several advantages over conventional methods. Still, there is a major drawback. Which among the following is it?

View solution

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

View solution

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

View solution

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

View solution

Q. Which of the following sentences is true?

View solution

Q. Radiation dryers use _____

View solution