Virtual Academy for the Semi Arid Tropics Course on Crop-Weather Relationships Module III: Weather Elements There are 19 multiple choice questions in this.

Virtual Academy for the Semi Arid Tropics

Course on Crop-Weather Relationships

Module III: Weather Elements

There are 19 multiple choice questions in this exercise.

Answer by clicking on one of the red letters (A, B, C, Or D). You will get a feedback to your response.

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1. 80 mm rainfall received in 30 minutes indicate

A. long duration rainfall

B. low intensity of rainfall

C. high intensity of rainfall

D. large size rain drops

2. Soil erosion may result with

A. Rains received over large area.

B. 120 mm of rainfall in 1 hour.

C. Low intensity rains with small drop size.

D. 10 mm of rainfall in 45 minutes.

3. Which type of rainfall you welcome to sow crops?

A. High intensity rains

B. Low intensity rains

C. 25 mm of rainfall a day before sowing

D. 10 cm rainfall after a day of sowing

4. Monsoon rains in India are received during

A. March to April and October to December

B. June to September and October to December

C. March to April and June to September

D. I am not sure

5. How rainfall breaks during late August and early September affect groundnut crop?

A. Delays sowing

B. Flower production is reduced

C. Pod development is affected

D. Harvesting of pods is difficult

6. Monsoon rains result due to

A. Lower temperatures over land than sea

B. Higher temperatures over land than sea

C. Low temperatures over land and sea

D. High temperatures over land and sea

7. The Relative humidity in the coastal areas during summer will be

A. low (10%)

B. moderate (30%)

C. high (50%)

D. very high (>60%)

8. Relative humidity is measured using

A. hygrometer

B. barometer

C. anemometer

D. I am not sure

9. At what relative humidity you will feel comfortable

A. 20%

B. 50%

C. 70%

D. 90%

10. Sunshine is recorded for measuring

A. minimum temperature

B. maximum temperature

C. day length

D. I am not sure

11. Maximum temperature is measured using ------ thermometer.

A. alcohol

B. mercury

C. Wet and dry bulb

D. I am not sure

12. Day and night temperatures vary because

of A. presence of moon during nights

B. absence of sun during nights

C. Cooler winds during nights

D. I am not sure

13. Air-pressure is measured by

A. hygrometer

B. barometer

C. anemometer

D. I am not sure

14. Lesser the air in the atmosphere, the air-pressure

A. will be low

B. will be high

C. will increase

D. I am not sure

15. A low-pressure system indicates

A. cooler temperatures

B. clear skies

C. possible rain

D. I am not sure

16. Wind velocity is measured by

A. anemometer

B. barometer

C. hygrometer

D. I am not sure

17. Winds move from

A. high air pressure to low pressure

B. low air pressure to high pressure

C. sea to land

D. land to sea

18. The type of clouds in the

picture are A. Rain-giving clouds

B. Fair-Weather clouds

C. Change-of-weather clouds

D. I am not sure

19. The type of clouds in the

picture are A. Rain-giving clouds

B. Fair-Weather clouds

C. Change-of-weather clouds

D. I am not sure

Thank you for completing this exercise.

Now you may select Module IV from Course contents.

Your answer is not correct.

The correct answer is:

80 mm rainfall received in 30 minutes indicate high intensity of rainfall.

Continue

You are right.

80 mm rainfall received in 30 minutes indicate high intensity of rainfall.

Continue

Your are right.

Soil erosion may result with a high intensity rainfall like 120 mm of rainfall in 1 hour.

Continue

Your answer is not correct.

Soil erosion may result with a high intensity rainfall like 120 mm of rainfall in 1 hour.

Continue

You are right.

Soaking rain like 25 mm of rainfall a day before will be useful to take up the sowings.

Continue

No please.

Water from high intensity rainfall mostly result in run off with very little water saturating the soil profile.

So soaking rain like 25 mm of rainfall a day before will be useful to take up the sowings.

Continue

No please.

You are partly correct because the amount of rainfall received is not clear from the statement to take up the sowings.

Soaking rain like 25 mm of rainfall a day before will be useful to take up the sowings.

Continue

You are right

Rains received during June to September, and October to December are monsoon rains.

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No please.

Rain during March to April are not monsoon rains. These rains are known as summer showers

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If you are not sure, the answer is:

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You are right

This break in rainfall coincides with pod development in groundnut and thus affect the pod formation and development.

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No please.

Please note the break in rainfall. Rains were received during flowering and harvesting stages and so, these stages may not be adversely affected due to moisture availability.

Breaks in rainfall during late August and early September coincides with pod development in groundnut, and thus affect the pod formation and development.

Continue

You are right

Higher temperatures over land than sea results in differential heating between land and sea. Consequent to this, air pressure will be higher on land compared to the sea. This pressure gradient brings moisture-laden winds towards land resulting in monsoon rains.

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No please.

Higher temperatures over land than sea results in differential heating between land and sea. Consequent to this, air pressure will be higher on land compared to the sea. This pressure gradient brings moisture-laden winds towards land resulting in monsoon rains.

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You are right

Near water body the air will be saturated with moisture. So, the RH will be quiet high (>60%) during summer in the coastal areas.

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No please.

Near water body the air will be saturated with moisture. So, the RH will be quiet high (>60%) during summer in the coastal areas.

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You are right

Relative humidity is measured using hygrometer (Fig.)

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No please.

Barometer is used to measure air pressure (top Fig.).

Relative humidity is measured using hygrometer (bottom Fig.)

Continue

No please.

Anemometer is used to measure wind velocity (top Fig.).

Relative humidity is measured using hygrometer (bottom Fig.)

Continue

If you are not sure, here is the answer:

Relative humidity is measured using hygrometer (Fig.)

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You are right

You will feel comfortable if RH is low. At high RH you will sweat more, feel sticky and uncomfortable.

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No please.

At high RH you will sweat more, feel sticky and uncomfortable. You will feel comfortable if RH is low.

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You are right

Sunshine is recorded to calculate day length.

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No please.

Sunshine do not provide maximum and minimum temperatures.

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You are right

Mercury thermometer is used to measure maximum temperature.

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No please.

Alcohol thermometer is used to measure the minimum temperature.

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No please.

Wet and dry bulb thermometer is used to measure the relative humidity.

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You are right

There will not be any short-wave radiation during the nights due to the absence of sun. This results in lower temperatures during nights compared to the day temperatures.

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No please.

Continue

You are right

Air-pressure is measured using aneroid barometer (Fig.)

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No please.

Hygrometer (top Fig.) is used to measure relative humidity.

Air-pressure is measured using aneroid barometer (bottom Fig.).

Continue

No please.

Anemometer is used to measure wind velocity (top Fig.).

Air-pressure is measured using aneroid barometer (bottom Fig.).

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Air-pressure is measured using aneroid barometer (Fig.).

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You are right

The air pressure will be lower with less air. That is why you feel difficult to breath as you climb a hill or more floors in a high-raised building.

More the air, higher will be the pressure.

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No please.

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You are right

A low-pressure system indicates cyclonic winds and subsequent possibility of rain.

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No please.

A high-pressure system leads to cooler temperatures and clear skies.

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A high-pressure system leads to cooler temperatures and clear skies.

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You are right

Anemometer is used to measure wind (Fig.).

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No please.

Air-pressure is measured using aneroid barometer (top Fig.).

Anemometer is used to measure wind (bottom Fig.).

Continue

No please.

Hygrometer (top Fig.) is used to measure relative humidity.

Anemometer is used to measure wind (Fig.).

Continue

Anemometer is used to measure wind (top Fig.).

Air-pressure is measured using aneroid barometer (middle Fig.).

Hygrometer (bottom Fig.) is used to measure relative humidity.

Continue

You are right

Winds move from a high-pressure system towards a low-pressure system.

Continue

No please.

The direction of winds between sea and land depends on the air pressure differences. If air pressure is higher over the land, then the winds move towards the sea and vice-versa.

Winds move from a high-pressure system towards a low-pressure system.

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You are right

The clouds in the picture are fair-weather clouds.

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No please.

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You are right

The clouds in the picture are rain-giving clouds.

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No please.

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Virtual Academy for the Semi Arid Tropics Course on Crop-Weather Relationships Module III: Weather Elements There are 19 multiple choice questions in this.

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