Questions and answers for exam Preparation

MCQs

Total Questions : 72 | Page 1 of 8 pages

Question 1. In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 2. 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.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 3. Which of the following is an advantage of using pumps as heat transfer equipment?

No stirrer required
Taking them to a heat exchanger where the area used for heat transfer can be easily changed
No stirrer required & taking them to a heat exchanger where the area used for heat transfer can be easily changed
None of the mentioned

Discuss Question

Answer: Option C. -> No stirrer required & taking them to a heat exchanger where the area used for heat transfer can be easily changed
Answer: (c).No stirrer required & taking them to a heat exchanger where the area used for heat transfer can be easily changed

Question 4. 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?

Some shear-sensitive cells might get damaged due to abrasion
It is difficult for pumps to withstand high temperature without leakages of the fluid
All of the mentioned
None of the mentioned

Discuss Question

Answer: Option C. -> All of the mentioned
Answer: (c).All of the mentioned

Question 5. Contamination takes place to high extend in Plate heat exchangers.

True, the space between plates is too less
False, they cannot be used for viscous liquids
Cannot be determined
True, they can be used for thin liquids only

Discuss Question

Answer: Option A. -> True, the space between plates is too less
Answer: (a).True, the space between plates is too less

Question 6. Any food item should be subjected to micro frequencies such that, the dielectric constant is _____ and loss factor is _____

Maximum, minimum
Maximum, maximum
Minimum, minimum
Minimum, maximum

Discuss Question

Answer: Option C. -> Minimum, minimum
Answer: (c).Minimum, minimum

Question 7. Penetration depth of food refers to the depth inside the food inside which the heat generation drops to 37%.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 8. Hannah heats refrigerated rice which has been devoid of moisture and become dry. She heats it in a microwave. It gets unevenly heated. What should she do?

Water should be added for even heating
She should heat it using equipment that offers conduction or convection
None of the mentioned
All of the mentioned

Discuss Question

Answer: Option A. -> Water should be added for even heating
Answer: (a).Water should be added for even heating

Question 9. Which of the following is untrue?

It is difficult to predict the electric field intensity inside a food material
Design of oven plays an important role in determining the electric filed intensity in a food material
Orientations of microwaves is an important role
None of the mentioned

Discuss Question

Answer: Option D. -> None of the mentioned
Answer: (d).None of the mentioned

Question 10. Which of the following is NOT a part of the microwave heating system?