Question

Which one among the following is a pneumatic sprayer?

• A. Foot sprayer
• B. Stirrup sprayer
• C. Hand compression sprayer
• D. Rocker sprayer

Hint:

Pneumatic sprayers work by compressing air in a sealed tank above the liquid. The hand compression sprayer is the most common example of this design.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Pesticide application equipment is classified based on how pressure is generated to atomize and discharge the liquid spray.
Sprayers can be hydraulic (where the liquid is pumped under pressure) or pneumatic (where air is compressed above the liquid inside a sealed tank).

Step 2: Detailed Explanation:
In a pneumatic sprayer, the spray fluid is filled into a sealed, pressure-tight tank, leaving some air space at the top.
A built-in air pump is used to compress the air in this space before spraying begins.
This compressed air exerts continuous downward pressure on the liquid surface.
When the discharge valve is opened, the compressed air forces the liquid out through the dip tube, hose, lance, and nozzle, atomizing it into a fine spray.
Because the operator pumps air to build up pressure before spraying rather than pumping liquid during spraying, it is classified as a pneumatic or compression sprayer.
The hand compression sprayer is a classic example of this design.
In contrast, foot sprayers (A), stirrup sprayers (B), and rocker sprayers (D) are hydraulic sprayers.
In these devices, the operator must continuously pump a hydraulic plunger or piston to force the liquid directly through the discharge line during application.
Therefore, the hand compression sprayer is the correct choice.

Step 3: Final Answer
The hand compression sprayer is a pneumatic sprayer.