Winnowing

Q.

What is the difference between threshing and winnowing

Q.

Name the process in which grains are separated from chaff and hay with the help of wind.

Q. Radha places some gram seeds in a water container and observes that a few seeds start floating on the surface of the water, while the rest sink to the bottom of the container. Next, she collects the floating and the sunken seeds and sows them in pots A and B respectively, both containing the same quality of the soil. She keeps the two pots in her garden and observes that only the seeds in pot B germinate.
Which of the following statements is correct?

1. The seeds sown in pot A were hollow, while the seeds sown in pot B were healthy.
2. The seeds sown in pot B were hollow, while the seeds sown in pot A were healthy.
3. The seeds sown in pot A received more sunlight than the seeds sown in pot B.
4. The seeds sown in pot B received more sunlight than the seeds sown in pot A.

Q.

Four mixtures are given below.

(i) Kidney beans and chickpeas

(ii) Pulses and rice

(iii) Rice flakes and corn

(iv) Potato wafers and biscuits

Which of these can be separated by the method of winnowing?

1. (i) and (ii)

2. (ii) and (iii)

3. (i) and (iii)

4. (iii) and (iv)

Q.

With respect to the following statements, choose the correct option.

(i) Winnowing is a time-consuming process for separating grain from chaff.
(ii) Fodder cannot be recovered by the process of winnowing.
(iii) Threshing is loosening of grain from chaff.
(iv) Traditional methods do not involve threshing.

1. Both of these

2. Harvesting machine

3. None of these

4. Winnowing machine

Q.

Difference between threshing and winnowing

Q.

The term used for the process of separating grains from chaff is

1. sieving

2. threshing

3. winnowing

4. hand picking

Q.

What is the proper definition for winnowing?

Q. __________ are light in weight and are carried away by wind during winnowing.

1. Chaff
2. Grains

Q.

78 A mixture of wheat grains and rice flakes can be separated by winnowing.

1. True
2. False

Q.

Winnowing is used to separate the husk from rice.

1. True
2. False

Q.

40 What happens when sand and powdered leaves are being fallen in the same place?

Q. Separation of grains from the chaff is called
(a) winnowing.
(b) harvesting.
(c) separation.
(d) threshing.

Q.

Write the principle behind the following separation technique.

Winnowing

Q. Match the items in column I with the appropriate ones in column II.

	Column I		Column II
I.	Winnowing	A.	Irrigation
II.	Threshing	B.	Hose
III.	Drip system	C.	Separation of grain from stalks by beating the stalks
IV.	Weeds	D.	Separation of husk from heavy seeds of grains by wind

Select the correct alternative.

1. I- D, II- C, III- A, IV- B
2. I- D, II- C, III- B, IV- A
3. I- C, II- D, III- A, IV- B
4. I- C, II- D, III- B, IV- A

Q.

Name the best method of separation of components: grains from chaff

Q. Complete the sentence with the correct word:

1. Vial
2. Barrel
3. Ampoule
4. Granary

Q. ____________ is used to separate heavier and lighter components of a mixture using wind.

1. Threshing
2. Winnowing
3. Sieving
4. Handpicking