Question

Given below are two statements:
Statement (I): The direct measurement of relative humidity is done using hygrometer.
Statement (II): The most common method of measuring relative humidity is using dry and wet bulb thermometers.

In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

While electronic hygrometers give direct digital readings, wet and dry-bulb thermometers are the primary calibration standards used to verify and build psychrometric charts.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Relative humidity is a key atmospheric and post-harvest drying parameter, measuring the water vapor pressure of air relative to its saturation limit.

Step 3: Detailed Explanation:
1.

Statement (I): A hygrometer (such as a hair, mechanical, or capacitive electronic sensor) is an instrument calibrated to read out the relative humidity of the air directly from a dial or display. Thus, Statement (I) is correct.
2.

Statement (II): A psychrometer, which consists of a dry-bulb thermometer (measuring air temperature) and a wet-bulb thermometer (measuring evaporative cooling temperature), is the most robust, widely available, and universally common field method to determine relative humidity. Thus, Statement (II) is correct.

Step 4: Final Answer:
The correct option is 1, which corresponds to "Both Statement (I) and Statement (II) are correct."