List of top Agricultural Engineering and Technology Questions on Post Harvest Engineering

Match List-I with List-II regarding food processing operations and their applications:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): Process of blanching minimises discolouration of food during dehydration.

Reason (R): Blanching cleans raw material and reduces surface bacterial load of the produce.

In light of the above statements, choose the correct answer from the options given below.

The diameter of largest inscribing circle of an object is observed to be 20 mm. What would be the sphericity of the object if diameter of smallest circumscribing circle is 30 mm?

It is found that the energy required to reduce particle from a mean diameter of 10 mm to 5 mm is 1 kJ/kg. Using Rittinger's law, what is the energy requirement to reduce the same from a diameter of 1 mm to 0.5 mm?

Process of freezing food below eutectic temperature and converting solid ice crystals directly into vapour form is known as

Frictional force of granular material is -

(A) Proportional to normal load

(B) Independent of the area of the sliding surface

(C) Proportional to actual area of contact

(D) Dependent on nature of material in contact

Choose the correct answer from the options given below:

Which of the following is related to international trade and promotion?

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): Falling film evaporators are most suitable for food that become thicker with concentration.

Reason (R): In falling film evaporator, food film moves downward under gravity instead of buoyancy force.

In light of the above statements, choose the correct answer from the options given below.

Match List-I with List-II.

Choose the correct answer from the options given below:

Agricultural waste from which activated carbon can be manufactured include(s)

(A) Rice husk

(B) Groundnut shell

(C) Oil cake

(D) Mango stone

Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): In a rubber roll sheller, paddy is sheared and compressed between two rollers so that its husk is stripped off.

Reason (R): Rollers in a rubber roll sheller rotate in same direction at different speed to increase contact of one roll longer than the other roll.

In light of the above statements, choose the correct answer from the options given below.

Which of the following statement(s) holds correct for a screw press?

(A) Compression ratio is the ratio of the volume displaced per revolution at feed end to that at discharge end.

(B) Volume displaced at feed end is considerably less than at discharge end.

(C) Volume displaced at feed end is considerably greater than at discharge end.

(D) Volume displaced at feed end is equal to that at discharge end.

Choose the correct answer from the options given below:

The effective tension of a belt conveyor -

Cyclone separator design is based on -

(A) High tangential velocity

(B) Low radial velocity

(C) Low tangential velocity

(D) High radial velocity

Choose the correct answer from the options given below:

Which among the following is a bag storage structure?

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): Thermal conductivity of a single grain is always greater than that of bulk grain.

Reason (R): Thermal conductivity of air is comparatively less than that of food grain.

In light of the above statements, choose the correct answer from the options given below.

What is the amount of heat to be removed from 2 tons of apples when cooled from 25°C to 5°C? Specific heat of apple is 0.1 kcal/kg°C.

The undesirable components which need to be removed during refining of crude vegetable oils include:

(A) Colouring and odouring matters

(B) Free fatty acids

(C) Gums

(D) Waxes

Choose the correct answer from the options given below:

Match List-I with List-II

Choose the correct answer from the options given below:

When one ton of grain with 25% (wb) moisture content is to be dried to 20% (wb), then the amount of water to be evaporated will be?

Which of the following Law's are based on gradient:
(A) Stefan-Boltzmann law
(B) Fourier's law
(C) Newton's law of cooling
(D) Fick's law

Choose the correct answer from the options given below:

A red brick wall of length 5 m, height 4 m and thickness 0.25 m has a temperature on the inner surface of 40 degree C and on the outer surface of 110 degree C. The thermal conductivity of the red brick is k = 0.70 W/mK. What will be the temperature at an interior point of the wall, 20 cm from the inner wall?

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): Counter flow heat exchanger is more effective than a parallel flow heat exchanger.

Reason (R): For same temperature limits of hot and cold fluids, the overall heat transfer coefficient of counter flow heat exchanger is more than parallel flow heat exchanger.

In light of the above statements, choose the correct answer from the options given below.