GRADE 2 EXAM REVIEW GUIDE 2026
COMPLETE PRACTICE QUESTIONS AND
ANSWERS
●● Wastewater entering a treatment plant is typically..
A. Somewhat warmer than unheated tap water
B. The same temperature as unheated tap water
C. Somewhat cooler than unheated tap water
D. Very much cooler than unheated tap water. Answer: A. Somewhat
warmer than unheated tap water
●● Anaerobic decomposition of wastewater produces..
A. Ammonium Chloride
B. Hydrogen Sulphide
C. Carbon Monoxide
D. Copper Sulphate. Answer: B. Hydrogen Sulphide
●● Which of the following causes overheating of mechanical
equipment?