Question

Instrument shelter used to protect the temperature measuring device from rain, wind or snow is called

• A. Stevenson screen
• B. Weather screen
• C. LCD screen
• D. Radiation protecting instrument

Hint:

Meteorological Instruments:
Stevenson Screen = Louvered shelter for thermometers/hygrometers.
Anemometer = Wind speed.
Sunshine Recorder = Campbell-Stokes.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Meteorological instrumentation standards: the Stevenson screen is a double-louvered wooden enclosure providing standardized, shielded ambient shade temperature and humidity measurements.

Step 2: Detailed Explanation:
In agricultural meteorology and weather stations:
- A Stevenson Screen (invented by Thomas Stevenson, 1864) is a standardized white-painted, double-louvered wooden shelter mounted $1.25 - 1.5\text{ meters}$ above ground level.
- It shields meteorological instruments (maximum and minimum thermometers, dry and wet bulb psychrometers, thermohygrographs) from direct solar radiation, precipitation (rain, snow), and wind buffeting while permitting free airflow to measure true ambient shade air temperature and relative humidity.

Step 3: Final Answer:
Thus, the instrument shelter is called a Stevenson screen, corresponding to option (A).