Humidity Multiple Choice Questions and Answers for Practice

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