Explore topic-wise MCQs in Food Engineering.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Radiation dryers use _____

A. Ultraviolet rays
B. Infrared radiation
C. Visible range
D. None of the mentioned
Answer» C. Visible range
Discussion
2.

In deep freezers, the walls absorb heat from food materials by _____ and keep them cool.

A. Conduction
B. Convection
C. Radiation
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
3.

Statement 1: Radiation dryers are used to dry grains and reduce their moisture content before storage.Statement 2: Baking ovens are used both for making the dough and after that’s made, making biscuits by cutting them and baking them further. This entire process uses radiation.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» C. False, False
Discussion
4.

Freezer is at -18 deg C. Will will be Radiative heat transfer if meat is at 298k, its emissivity is 0.82 and average area is 0.045m2.Either use Stefan Boltzmann law or take hr (radiative heat transfer co-efficient) as 0.227.ε = ( Tav/100 )3

A. 7.61
B. 6.94
C. 8.43
D. None of the mentioned
Answer» B. 6.94
Discussion
5.

Statement 1: Radiation is NOT heat.Statement 2: Maximum value of absorptivity is 1.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» C. False, False
Discussion
6.

Statement 1: Radiation needs a medium to travel.Statement 2: Thermal radiation takes place at a certain temperature for every body.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» D. False, True
Discussion
7.

Statement 1: Radiation is the transfer of heat by electromagnetic waves.Statement 2: When heat is radiated from a hot source, the amount of heat received by the body depends on the nature of the body.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» C. False, False
Discussion
8.

IN_DEEP_FREEZERS,_THE_WALLS_ABSORB_HEAT_FROM_FOOD_MATERIALS_BY_______AND_KEEP_THEM_COOL.?$

A. Conduction
B. Convection
C. Radiation
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
9.

Radiation dryers use _____$

A. Ultraviolet rays
B. Infrared radiation
C. Visible range
D. None of the mentioned
Answer» C. Visible range
Discussion
10.

Statement 1: Radiation dryers are used to dry grains and reduce their moisture content before storage?

A.
B. True, False
C. True, True
Answer» C. True, True
Discussion
11.

Freezer is at -18 deg C. Will will be Radiative heat transfer if meat is at 298k, its emissivity is 0.82 and average area is 0.045m2.

A. as 0.227.
B. <sup>3</sup>
C. 7.61
D. 6.94
Answer» B. <sup>3</sup>
Discussion
12.

Which of the following reason does NOT affect radiation between two parallel bodies?

A. Angle of vision
B. Orientation of surfaces
C. Emissivity of both
D. Smoothness and roughness
Answer» B. Orientation of surfaces
Discussion
13.

A food industry keeps food cool in a very crude manner, by radiation. It paints its walls white and not black, because of _____

A. Kirchhoff’s Law
B. Stephan-Boltzmann Law
C. None of the mentioned
D. Kirchhoff’s Law & Stephan-Boltzmann Law
Answer» B. Stephan-Boltzmann Law
Discussion
14.

The emission of radiation by any body is independent of the radiation by any body next to it.

A. True
B. False
Answer» B. False
Discussion
15.

Statement 1: Radiation is NOT heat.

A.
B. True, False
C. True, True
Answer» C. True, True
Discussion
16.

Statement 1: Radiation needs a medium to travel.

A.
B. True, False
C. True, True
Answer» D.
Discussion
17.

Statement 1: Radiation is the transfer of heat by electromagnetic waves.

A.
B. True, False
C. True, True
Answer» C. True, True
Discussion