Question

Arrange the parts of a tensiometer from the bottom to the top of the instrument.
A. Transparent pipe
B. Connecting tube
C. Ceramic cup
D. Vacuum gauge
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. A, C, B, D
• C. B, A, D, C
• D. C, B, A, D

Hint:

Visualize building a tensiometer from the ground up: You start with the part that goes in the soil (Ceramic Cup), connect it with a tube (Connecting tube), add the main water reservoir (Transparent pipe), and cap it with the measuring device (Vacuum gauge).

Answer 1

The Correct Option is C

Step 1: Comprehend tensiometer construction. A tensiometer quantifies soil water potential (suction). It comprises a porous tip inserted into the soil, linked via a water-filled tube to a vacuum gauge.
Step 2: Order the components from bottom (in soil) to top.
1. C. Ceramic cup: The porous tip at the instrument's base, inserted into the soil. Water movement through the cup's pores generates a vacuum in the tube.
2. B. Connecting tube: A short tube section linking the ceramic cup to the instrument's main body.
3. A. Transparent pipe: The tensiometer's main body, a clear, rigid tube filled with water. It enables observation for air bubbles in the system.
4. D. Vacuum gauge: Positioned at the instrument's apex, this gauge (manometer) measures the vacuum or tension in the water column, reflecting soil water potential.
The correct sequence from bottom to top is C \(\rightarrow\) B \(\rightarrow\) A \(\rightarrow\) D.