Question

Class -A USWB pan has the following specifications:
A. It has metallic sheet of 22 gauge.
B. It has a diameter of 1.2 m.
C. It is painted as green.
D. It has a depth of 25 cm.
E. It is directly placed on the ground surface.
Choose the correct answer from the options given below:

• A. A, C, D and E only
• B. B and D only
• C. A, B and D only
• D. B, C, D and E only

Hint:

For the Class A pan, remember these key features: \(\sim\)1.2 m diameter, 25 cm depth, 22-gauge galvanized iron, UNPAINTED, and placed ON a wooden platform above the ground.

Answer 1

The Correct Option is C

Step 1: Access the established criteria for a U.S. Weather Bureau (USWB) Class A Evaporation Pan.
- Statement A: The pan is fabricated from 22-gauge unpainted galvanized iron. This assertion is accurate.
- Statement B: The pan's customary diameter is 47.5 inches (120.7 cm, or about 1.2 m). This assertion is accurate.
- Statement C: The pan's interior surface is unpainted, maintaining a standard galvanized finish. It is not painted green. This assertion is inaccurate.
- Statement D: The pan's standard depth measures 10 inches (25.4 cm, or approximately 25 cm). This assertion is accurate.
- Statement E: The pan is not positioned directly on the ground. It necessitates mounting on an open wooden frame, approximately 15 cm elevated from the ground, to facilitate airflow beneath. This assertion is inaccurate.
Step 2: Determine the accurate compilation.
The accurate specifications are A, B, and D.