Question

20 multiple choice 1 point what is one of the possible hazards related to the task of monitoring raw water pumps? chemical exposure presence of venomous snakes extreme cold slippery surfaces 21 multiple choice 1 point exposure to moving parts on mixers and skimmers is related to which of the following tasks? working with clarifiers cleaning screens injecting chlorine monitoring fire pumps

Explanation:

For question 20: Raw water pump areas are typically wet environments, making slippery surfaces a direct, common hazard during monitoring.
For question 21: Clarifiers use mixers and skimmers as core components, so working with clarifiers brings risk of exposure to their moving parts.

Answer:

1. Slippery surfaces
2. Working with clarifiers