Wastewater/Practice exam questions with correct answers

When organic wastes are discharged to receiving waters, O2 is depleted by _____. CORRECT ANSWER bacteria Hydrogen sulfide gives off an odor similar to____. CORRECT ANSWER rotten eggs 3 diseases potentially carried by wastewater are _____. CORRECT ANSWER typhoid fever, disentery, cholera Immediate first aid for butrns is to ____. CORRECT ANSWER flood with cold water What most likely causes an electic motor failure? CORRECT ANSWER mopisture What mixed liquor characteristics indicate a healthy activated sludge process? CORRECT ANSWER brown color, frothy appearance, and musty odor T/F: Algae is a plant life necessary for the proper functioning of a stabilization or oxidation pond. CORRECT ANSWER True Chlorine gas is ? CORRECT ANSWER heavier than air T/F: The highest concentration of algae growth in a facultative lagoon is usually observed near the top. CORRECT ANSWER True