CWEA Grade 2 Lab Analyst Practice Test Full
Questions with 100% Verified Answers Complete
Solutions UPDATED 2026/2027!!!!!!
200 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Advanced Instrumentation
2 Advanced Chemistry
3 Advanced Microbiology
4 Quality Assurance/Quality Control
5 Regulatory Compliance
6 Laboratory Management
7 Advanced Calculations
8 Safety
9 Nutrient Analysis
10 Toxicity Testing
11 Solids and Biosolids
12 Disinfection Byproducts
,Q1
Which instrument is used for trace metal analysis at parts per billion levels?
A) Spectrophotometer
B) ICP-MS CORRECT
C) pH meter
D) Turbidimeter
Rationale
ICP-MS (Inductively Coupled Plasma Mass Spectrometry) detects trace metals at ppb or lower.
Q2
What does ICP stand for?
A) Inductively Coupled Plasma
B) Inductively Coupled Plasma CORRECT
C) Ion Coupled Plasma
D) Integrated Coupled Plasma
Rationale
ICP uses plasma to atomize and ionize samples for metal analysis.
Q3
Which detector is used in GC-MS?
A) Flame ionization detector
B) Mass spectrometer CORRECT
C) Thermal conductivity detector
D) Electron capture detector
2
,Rationale
GC-MS uses a mass spectrometer for identification and quantification.
Q4
What is the purpose of a TOC analyzer?
A) Measure total organic carbon
B) Measure total organic carbon CORRECT
C) Measure total inorganic carbon
D) Measure total carbon
Rationale
TOC analyzers measure organic carbon in water samples.
Q5
Which method is used for volatile organic compounds?
A) GC-MS
B) GC-MS CORRECT
C) ICP-MS
D) IC
Rationale
GC-MS is standard for volatile organic compounds (VOCs).
Q6
What is the purpose of IC?
A) Ion chromatography
B) Ion chromatography CORRECT
3
, C) Inductively coupled
D) Infrared chromatography
Rationale
IC measures anions and cations in water.
Q7
What is the primary use of HPLC?
A) Metal analysis
B) Organic compound analysis CORRECT
C) Anion analysis
D) Gas analysis
Rationale
HPLC separates and quantifies organic compounds.
Q8
What is a method detection limit?
A) Lowest detectable concentration
B) Lowest concentration reliably detected CORRECT
C) Highest concentration
D) Average concentration
Rationale
MDL is the lowest concentration that can be detected with confidence.
4
Questions with 100% Verified Answers Complete
Solutions UPDATED 2026/2027!!!!!!
200 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Advanced Instrumentation
2 Advanced Chemistry
3 Advanced Microbiology
4 Quality Assurance/Quality Control
5 Regulatory Compliance
6 Laboratory Management
7 Advanced Calculations
8 Safety
9 Nutrient Analysis
10 Toxicity Testing
11 Solids and Biosolids
12 Disinfection Byproducts
,Q1
Which instrument is used for trace metal analysis at parts per billion levels?
A) Spectrophotometer
B) ICP-MS CORRECT
C) pH meter
D) Turbidimeter
Rationale
ICP-MS (Inductively Coupled Plasma Mass Spectrometry) detects trace metals at ppb or lower.
Q2
What does ICP stand for?
A) Inductively Coupled Plasma
B) Inductively Coupled Plasma CORRECT
C) Ion Coupled Plasma
D) Integrated Coupled Plasma
Rationale
ICP uses plasma to atomize and ionize samples for metal analysis.
Q3
Which detector is used in GC-MS?
A) Flame ionization detector
B) Mass spectrometer CORRECT
C) Thermal conductivity detector
D) Electron capture detector
2
,Rationale
GC-MS uses a mass spectrometer for identification and quantification.
Q4
What is the purpose of a TOC analyzer?
A) Measure total organic carbon
B) Measure total organic carbon CORRECT
C) Measure total inorganic carbon
D) Measure total carbon
Rationale
TOC analyzers measure organic carbon in water samples.
Q5
Which method is used for volatile organic compounds?
A) GC-MS
B) GC-MS CORRECT
C) ICP-MS
D) IC
Rationale
GC-MS is standard for volatile organic compounds (VOCs).
Q6
What is the purpose of IC?
A) Ion chromatography
B) Ion chromatography CORRECT
3
, C) Inductively coupled
D) Infrared chromatography
Rationale
IC measures anions and cations in water.
Q7
What is the primary use of HPLC?
A) Metal analysis
B) Organic compound analysis CORRECT
C) Anion analysis
D) Gas analysis
Rationale
HPLC separates and quantifies organic compounds.
Q8
What is a method detection limit?
A) Lowest detectable concentration
B) Lowest concentration reliably detected CORRECT
C) Highest concentration
D) Average concentration
Rationale
MDL is the lowest concentration that can be detected with confidence.
4
