CWEA Grade 1 Lab Analyst Practice Test Full
Questions with 100% Verified Answers Complete
Solutions UPDATED 2026/2027!!!!!!
199 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Safety
2 Sampling
3 BOD Testing
4 TSS Testing
5 pH and Alkalinity
6 Chlorine Analysis
7 Microbiology
8 Solids Analysis
9 Nutrients
10 Metals and Organics
11 Quality Control
12 Regulations
13 Instrumentation
14 Calculations
,Q1
What is the primary purpose of a laboratory safety program?
A) Increase productivity
B) Protect personnel from hazards CORRECT
C) Reduce costs
D) Improve accuracy
Rationale
Safety programs protect workers from chemical, biological, and physical hazards.
Q2
Which document provides information about chemical hazards?
A) Chain of custody
B) Safety Data Sheet (SDS) CORRECT
C) NPDES permit
D) Standard Methods
Rationale
SDS provides handling, storage, and emergency information for chemicals.
Q3
What does PPE stand for?
A) Personal Protective Equipment
B) Personal Protective Equipment CORRECT
C) Public Protection Equipment
D) Primary Protection Equipment
2
,Rationale
PPE includes gloves, goggles, lab coats, and respirators.
Q4
When should safety goggles be worn in the laboratory?
A) Only when handling acids
B) At all times CORRECT
C) Only during titrations
D) Only when instructed
Rationale
Eye protection is required whenever in the laboratory.
Q5
What is the proper way to dilute concentrated acid?
A) Add water to acid
B) Add acid to water CORRECT
C) Mix simultaneously
D) Add ice first
Rationale
Adding acid to water prevents violent boiling and splattering.
Q6
Where should acids be stored?
A) With bases
B) Separately from bases CORRECT
3
, C) With organics
D) In direct sunlight
Rationale
Acids and bases react violently if mixed.
Q7
What type of fire extinguisher is used for electrical fires?
A) Water
B) CO2 or dry chemical CORRECT
C) Foam
D) Sand
Rationale
CO2 and dry chemical are safe for electrical fires.
Q8
What is the first step if a chemical splashes in your eye?
A) Notify supervisor
B) Flush with water for 15 minutes CORRECT
C) Apply ointment
D) Close eye tightly
Rationale
Immediate flushing minimizes damage.
4
Questions with 100% Verified Answers Complete
Solutions UPDATED 2026/2027!!!!!!
199 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Safety
2 Sampling
3 BOD Testing
4 TSS Testing
5 pH and Alkalinity
6 Chlorine Analysis
7 Microbiology
8 Solids Analysis
9 Nutrients
10 Metals and Organics
11 Quality Control
12 Regulations
13 Instrumentation
14 Calculations
,Q1
What is the primary purpose of a laboratory safety program?
A) Increase productivity
B) Protect personnel from hazards CORRECT
C) Reduce costs
D) Improve accuracy
Rationale
Safety programs protect workers from chemical, biological, and physical hazards.
Q2
Which document provides information about chemical hazards?
A) Chain of custody
B) Safety Data Sheet (SDS) CORRECT
C) NPDES permit
D) Standard Methods
Rationale
SDS provides handling, storage, and emergency information for chemicals.
Q3
What does PPE stand for?
A) Personal Protective Equipment
B) Personal Protective Equipment CORRECT
C) Public Protection Equipment
D) Primary Protection Equipment
2
,Rationale
PPE includes gloves, goggles, lab coats, and respirators.
Q4
When should safety goggles be worn in the laboratory?
A) Only when handling acids
B) At all times CORRECT
C) Only during titrations
D) Only when instructed
Rationale
Eye protection is required whenever in the laboratory.
Q5
What is the proper way to dilute concentrated acid?
A) Add water to acid
B) Add acid to water CORRECT
C) Mix simultaneously
D) Add ice first
Rationale
Adding acid to water prevents violent boiling and splattering.
Q6
Where should acids be stored?
A) With bases
B) Separately from bases CORRECT
3
, C) With organics
D) In direct sunlight
Rationale
Acids and bases react violently if mixed.
Q7
What type of fire extinguisher is used for electrical fires?
A) Water
B) CO2 or dry chemical CORRECT
C) Foam
D) Sand
Rationale
CO2 and dry chemical are safe for electrical fires.
Q8
What is the first step if a chemical splashes in your eye?
A) Notify supervisor
B) Flush with water for 15 minutes CORRECT
C) Apply ointment
D) Close eye tightly
Rationale
Immediate flushing minimizes damage.
4
