Humidity MCQs Quiz Multiple Choice Questions & Answers

1. A psychrometer is

1. A hair element instrument
2. A wet and dry bulb humidity instrument
3. An instrument that senses psychological disturbances
4. An instrument that reads directly in dew point

2. A device used to measure humidity is called a

1. Psychrometer
2. Hygrometer
3. Both
4. None

3. All of the following statements are true except

1. Relative humidity of a mass of air falls if temperature of the air rises
2. Air is saturated when its relative humidity is 100%
3. When air subsides its relative humidity decreases
4. The relative humidity of a mass of air remains constant when the air crosses over a cold land surface from a warm water surface

4. Amount of water vapor in air is regarded as

1. water vapor
2. humidity
3. mildness
4. pressure

5. Amount of water vapour in air is regarded as

1. water vapour
2. Humidity
3. Mildness
4. Pressure

6. Because of which one of the following factors, clouds do not precipitate in deserts?

1. Low pressure
2. Low humidity
3. High wind velocity
4. High temperature

7. Condensation is a process which occurs when

1. temperature falls below 0 degree Centigrate
2. absolute humidity becomes equal to relative humidity
3. temperature in the air parcel remains static
4. relative humidity becomes 100% and more

8. Dew point normally occurs when a mass of air has relative humidity of

1. 50%
2. 75%
3. 80%
4. 100%

9. Factor influencing humidity includes

1. temperature
2. pressure
3. water
4. osmosis

10. Humidity is the result of

1. Evapouration
2. Transpiration
3. Presence of heat
4. Presence of moisture content in the air

11. Humidity refers to

1. Brackishness of water
2. Latent heat
3. Water vapour in the atmosphere
4. None of these

12. If the dew point is below freezing, it is referred to as

1. Dew point
2. Specific humidity
3. Frost point
4. Humidity during rain

13. Point at which gases turn in to liquid is called its

1. peak point
2. dew point
3. converting point
4. equilibrium point

14. Relative humidity of atmosphere is measured by

1. Hydrometer
2. Hygrometer
3. Potentiometer
4. Lactometer

15. Relative humidity refers to

1. Absolute amount of water vapour in the atmosphere
2. The amount of hygroscopic nuclei in the atmosphere
3. Saturated vapour pressure
4. Ration of actual amount of water vapour in the air to the amount it could hold at the temperature

16. Specific humidity is

1. The indicator of density of water vapour
2. The maximum water content existing in the atmosphere.
3. It is the ratio of the mass of water vapour present to the total mass of air.
4. none of the above

17. The actual moisture content of a sample of air as a percentage of that contained in the same volume of saturated air at the same temperature is called:

1. absolute humidity
2. relative humidity
3. specific humidity
4. vapour pressure

18. The instrument used for measuring relative humidity in air is

1. Hygrograph or psychrometer
2. Hydrograph
3. Pantograph
4. Barograph

19. The mass of water vapour divided by the mass of dry a in a volume of air at a given temperature is called

1. Absolute humidity
2. Specific humidity
3. Relative humidity
4. Humidity during rain

20. The quantity of water in a particular volume of air is called

1. Absolute humidity
2. Specific humidity
3. Relative humidity
4. Humidity during rair

21. The relative humidity of a region is low when

1. The wet and dry bulb thermometers read the same.
2. The difference between the readings of the wet and dry bulb thermometers is large
3. The temperatures are high
4. The temperatures are low

22. Water vapour has several very important functional roles on our planet. These are

1. It redistributes heat energy on the Earth through latent heat energy exchange.
2. The condensation of water vapour creates precipitation that falls to the Earths surface providing needed fresh water for plants and animals.
3. It helps warm the Earths atmosphere through the greenhouse effect.
4. All the above

23. What is relative humidity?

1. It is the ratio of specific humidity
2. It is the indicator of moisture content in the atmosphere.
3. It implies maximum vapour pressure in the atmosphere.
4. It is present everywhere

24. Which of the following does not affect visibility on the ground?

1. Mist
2. Fog
3. haze
4. dew

25. Which of the following instruments is used to measure humidity?

1. Kate Thermometer
2. Anemometer
3. Sling Psychrometer
4. Clinical Thermometer

26. Which of the following is defined as the ratio of th partial pressure of water vapour in a parcel of air to the saturated vapour pressure of water vapour at a prescribe temperature?

1. Absolute humidity
2. Specific humidity
3. Relative humidity
4. Humidity during rain

27. Which of the following is the temperature at which water vapour saturates from an air mass into liquid or solid usually forming rain, snow, frost, or dew?

1. Dew point
2. Specific humidity
3. Frost point
4. Humidity during rain

28. Which of the following statement is true

1. Saturated air has a relative humidity of 100%
2. Air with a relative humidity in excess of 100% is said to be supersaturated
3. Relative humidity is measured with a hygrometer
4. All the above

29. Which of the following statements is / are correct about convection?

1. The act or process of conveying; transmission
2. Heat transfer in a gas or liquid by the circulation of currents from one region to another
3. The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward
4. All the above

30. Which term is used to describe the amount of water vapour that exists in a gaseous mixture of air and water vapour

1. Absolute Humidity
2. Specific Humidity
3. Dynamic Humidity
4. Relative Humidity