Understanding Relative Humidity Concepts

This video tutorial explains the concepts of absolute and relative humidity, and how they are influenced by temperature. It introduces the sling hygrometer, an instrument used to measure relative humidity, and demonstrates its use through practical examples. The video concludes with a quiz to test understanding of the material.

What is the term used to describe the amount of water vapor in the air relative to the maximum it can hold?

• Saturation

• Condensation

• Relative humidity

• Absolute humidity

What happens when the moisture content in the air exceeds saturation?

• The air temperature increases

• The excess moisture condenses into droplets

• The moisture evaporates

• The air holds more moisture

How is relative humidity expressed?

• As a ratio of dry air to water vapor

• As a measure of air pressure

• As a percentage of actual moisture to maximum capacity

• As a fixed value regardless of temperature

What is the primary function of a sling hygrometer?

• To measure wind speed

• To measure temperature

• To measure air pressure

• To measure relative humidity

What is the role of the wet bulb in a sling hygrometer?

• To measure the temperature drop due to evaporation

• To measure dry air temperature

• To absorb moisture from the air

• To cool down the air

In a bathroom after a shower, why is the temperature difference between the dry and wet bulb smaller?

• Because the air is cooler

• Because the air pressure is lower

• Because the relative humidity is higher

• Because the air is drier

What is the relative humidity of air coming out from a dehumidifier?

• 100%

• 75%

• 50%

• 29%

How does a digital hygrometer differ from a sling hygrometer?

• It requires manual calculation

• It provides a direct digital readout

• It uses mercury to measure humidity

• It measures air pressure

What is the expected relative humidity of air coming out from an air conditioner?

• 40%

• 100%

• 60%

• 80%

Why is it unnecessary to sling the hygrometer when measuring air from a dehumidifier?

• Because the air is too cold

• Because the air is already moving

• Because the air is too dry

• Because the air is already saturated