Grain Drying and Storage MCQs

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1. : The main purpose of grain drying is to?
(A) Increase grain color
(B) Reduce moisture content for safe storage
(C) Improve taste
(D) Increase grain size

2. : The safe moisture content of wheat for long-term storage is around?
(A) 25%
(B) 20%
(C) 12%
(D) 18%

3. : The moisture content of paddy recommended for storage is about?
(A) 22%
(B) 14%
(C) 18%
(D) 10%

4. : Which type of dryer is most commonly used for grains?
(A) Spray dryer
(B) Fluidized bed dryer
(C) Bin dryer
(D) Freeze dryer

5. : The principle of grain drying is based on?
(A) Evaporation of moisture
(B) Condensation of air
(C) Freezing of water
(D) Absorption of gases

6. : The process of natural drying of grains by spreading them under the sun is called?
(A) Mechanical drying
(B) Artificial drying
(C) Solar drying
(D) Sun drying

7. : In grain storage, hermetic storage means?
(A) Storing grains with chemicals
(B) Storage in air-tight containers to prevent oxygen entry
(C) Storage under refrigeration
(D) Open-air storage

8. : The main factor causing spoilage of grains in storage is?
(A) Soil type
(B) High moisture and temperature
(C) Color of grains
(D) Variety of crop

9. : Which insect is commonly known as a storage pest in wheat?
(A) Rice weevil
(B) Bollworm
(C) Aphid
(D) Whitefly

10. : The storage structure commonly used for bulk storage of grains is?
(A) Crates
(B) Silos
(C) Bags
(D) Cold store

11. : The moisture content of maize for safe storage is about?
(A) 25%
(B) 20%
(C) 13%
(D) 18%

12. : The process of treating stored grains with chemicals to kill insects is called?
(A) Blanching
(B) Fumigation
(C) Sterilization
(D) Fermentation

13. : Which of the following is a mechanical dryer?
(A) Sun drying
(B) Bin dryer
(C) Open yard drying
(D) Solar drying

14. : In storage, the main cause of fungal growth in grains is?
(A) Low temperature
(B) High moisture
(C) Low oxygen
(D) Use of chemicals

15. : Which gas is produced inside hermetic grain storage that helps control insects?
(A) Oxygen
(B) Carbon dioxide
(C) Ethylene
(D) Nitrogen

16. : The maximum moisture content of paddy for milling is about?
(A) 10%
(B) 14%
(C) 22%
(D) 18%

17. : The principle of aeration in grain storage is to?
(A) Increase temperature
(B) Maintain uniform temperature and reduce moisture migration
(C) Add nutrients to grains
(D) Improve flavor

18. : Which structure is used for short-term storage of grains at the farm level?
(A) Silos
(B) Godowns
(C) Cribs
(D) Cold stores

19. : Which insect pest is known as the “primary pest of stored grains”?
(A) Pulse beetle
(B) Rice weevil
(C) Flour beetle
(D) Red flour mite

20. : The process of reducing grain temperature below ambient by blowing air is called?
(A) Freezing
(B) Aeration
(C) Refrigeration
(D) Blanching

21. : Which factor does NOT affect grain drying?
(A) Air velocity
(B) Air temperature
(C) Air humidity
(D) Grain color

22. : The main purpose of drying maize cobs before shelling is to?
(A) Improve taste
(B) Reduce kernel breakage
(C) Enhance color
(D) Reduce protein content

23. : Which type of dryer uses hot air passing through a perforated floor to dry grains?
(A) Tray dryer
(B) Fluidized bed dryer
(C) Bin dryer
(D) Rotary dryer

24. : The moisture content of paddy at harvesting is normally around?
(A) 10–12%
(B) 14–16%
(C) 18–22%
(D) 8–10%

25. : The main objective of grain storage is to?
(A) Increase yield
(B) Prevent quantitative and qualitative losses
(C) Change color of grains
(D) Enhance germination