Which of the following is a feature of the hand shaker for applying toxic tracking powders?

The hand shaker designed for applying toxic tracking powders typically includes a screened or perforated lid as a key feature. This design allows the operator to dispense the powder in a controlled manner, creating a fine, even application that helps to ensure that the powder effectively adheres to the surfaces it is intended to treat. The screened or perforated lid helps to prevent clumping and allows the powder to escape gradually, which is particularly important for tracking powders that need to be spread out effectively to monitor pest activity.

In contrast, features such as a spray nozzle, electricity requirement, or suitability for liquid formulations do not apply to this type of application. A spray nozzle is generally associated with liquid applications, while a hand shaker operates mechanically and does not require electricity. Moreover, toxic tracking powders are specifically designed for solid application rather than for liquids, reinforcing the importance of the proper design features tailored to that purpose.