CWEA Grade 1 Lab Analyst Practice Test
Part 2 | Complete Questions with Correct
Detailed Answers | 100% Correct | A Grade
Exam Description
The CWEA Grade 1 Lab Analyst exam tests fundamental knowledge for entry-level lab work in
water/wastewater, focusing on safety, basic math (temp conversion, sig figs, rounding),
equipment (balances, pH meters), sampling protocols, and core parameters like BOD, COD,
alkalinity, and coliforms, using a multiple-choice format to assess practical competency in safe,
effective lab duties. It's the starting point for CWEA's tiered certification, requiring no prior
experience but recommending about a year on the job.
Key Topics Covered:
• Laboratory Fundamentals: Safety, precision, accuracy, significant figures, temperature
conversion, proper labeling, and hold times.
• Basic Equipment Use: Analytical balances, pH meters, meters for conductivity.
• Sample Handling & Protocols: Chain-of-Custody, proper bottles, preservation, and
holding times for various tests (e.g., pH, BOD, Chloride, TSS).
• Fundamental Parameters: Definitions and measurement principles for BOD, COD,
Alkalinity, pH, Color, Conductivity, Chloride, and bacteria (coliforms).
• Calculations & Math: Normality equations, rounding rules, and understanding units.
Exam Format & Structure:
• Multiple Choice: This exam is a multiple-choice format, testing recall, synthesis, and
evaluation.
• Job-Related: Questions are based on essential duties identified through Job Task Analyses
(JTAs) by experts.
• Entry-Level: Grade 1 is entry-level; no experience is required, but one year is
recommended, covering basic competency. (Ultimate Guide for YR. 2026/2027)
1
, Quiz_________________?
What is chloride? -
Answer☑️
Major anion found in many natural waters - Can impart salty taste in H2O
Quiz_________________?
What increases the concentration of chloride in wastewater? -
Answer☑️
Chloride in human diet and softeners flushed into sanitary sewer system
Quiz_________________?
2 most prevalent methods of measuring chloride? -
Answer☑️
argentometric and mercuric nitrate
Quiz_________________?
What is the Argentometric method? -
Answer☑️
Titration of the sample with a standard solution of silver nitrate (AgNO3) -
Indicator: Chromate ions (CrO4) - End point: reddish silver chromate
2
Part 2 | Complete Questions with Correct
Detailed Answers | 100% Correct | A Grade
Exam Description
The CWEA Grade 1 Lab Analyst exam tests fundamental knowledge for entry-level lab work in
water/wastewater, focusing on safety, basic math (temp conversion, sig figs, rounding),
equipment (balances, pH meters), sampling protocols, and core parameters like BOD, COD,
alkalinity, and coliforms, using a multiple-choice format to assess practical competency in safe,
effective lab duties. It's the starting point for CWEA's tiered certification, requiring no prior
experience but recommending about a year on the job.
Key Topics Covered:
• Laboratory Fundamentals: Safety, precision, accuracy, significant figures, temperature
conversion, proper labeling, and hold times.
• Basic Equipment Use: Analytical balances, pH meters, meters for conductivity.
• Sample Handling & Protocols: Chain-of-Custody, proper bottles, preservation, and
holding times for various tests (e.g., pH, BOD, Chloride, TSS).
• Fundamental Parameters: Definitions and measurement principles for BOD, COD,
Alkalinity, pH, Color, Conductivity, Chloride, and bacteria (coliforms).
• Calculations & Math: Normality equations, rounding rules, and understanding units.
Exam Format & Structure:
• Multiple Choice: This exam is a multiple-choice format, testing recall, synthesis, and
evaluation.
• Job-Related: Questions are based on essential duties identified through Job Task Analyses
(JTAs) by experts.
• Entry-Level: Grade 1 is entry-level; no experience is required, but one year is
recommended, covering basic competency. (Ultimate Guide for YR. 2026/2027)
1
, Quiz_________________?
What is chloride? -
Answer☑️
Major anion found in many natural waters - Can impart salty taste in H2O
Quiz_________________?
What increases the concentration of chloride in wastewater? -
Answer☑️
Chloride in human diet and softeners flushed into sanitary sewer system
Quiz_________________?
2 most prevalent methods of measuring chloride? -
Answer☑️
argentometric and mercuric nitrate
Quiz_________________?
What is the Argentometric method? -
Answer☑️
Titration of the sample with a standard solution of silver nitrate (AgNO3) -
Indicator: Chromate ions (CrO4) - End point: reddish silver chromate
2
