CWEA Grade 1 Lab Analyst Practice Test Full
Questions with 100% Verified Answers
Complete Solutions UPDATED 2026/2027!!!!!!
1. What is the primary purpose of a laboratory safety program?
A) Increase productivity
B) Protect personnel from hazards
C) Reduce costs
D) Improve accuracy
Answer: B
Rationale: Safety programs protect workers from chemical, biological, and physical hazards.
2. Which document provides information about chemical hazards?
A) Chain of custody
B) Safety Data Sheet (SDS)
C) NPDES permit
D) Standard Methods
Answer: B
Rationale: SDS provides handling, storage, and emergency information for chemicals.
3. What does PPE stand for?
A) Personal Protective Equipment
B) Personal Protective Equipment
C) Public Protection Equipment
D) Primary Protection Equipment
Answer: B
Rationale: PPE includes gloves, goggles, lab coats, and respirators.
,4. When should safety goggles be worn in the laboratory?
A) Only when handling acids
B) At all times
C) Only during titrations
D) Only when instructed
Answer: B
Rationale: Eye protection is required whenever in the laboratory.
5. What is the proper way to dilute concentrated acid?
A) Add water to acid
B) Add acid to water
C) Mix simultaneously
D) Add ice first
Answer: B
Rationale: Adding acid to water prevents violent boiling and splattering.
6. Where should acids be stored?
A) With bases
B) Separately from bases
C) With organics
D) In direct sunlight
Answer: B
Rationale: Acids and bases react violently if mixed.
7. What type of fire extinguisher is used for electrical fires?
A) Water
2
,B) CO2 or dry chemical
C) Foam
D) Sand
Answer: B
Rationale: CO2 and dry chemical are safe for electrical fires.
8. What is the first step if a chemical splashes in your eye?
A) Notify supervisor
B) Flush with water for 15 minutes
C) Apply ointment
D) Close eye tightly
Answer: B
Rationale: Immediate flushing minimizes damage.
9. What is the purpose of an eyewash station?
A) Clean glassware
B) Flush chemicals from eyes
C) Store solutions
D) Wash hands
Answer: B
Rationale: Eyewash stations provide emergency eye flushing.
10. What is the purpose of a safety shower?
A) Clean equipment
B) Rinse chemicals from body
C) Store PPE
D) Water plants
Answer: B
3
, Rationale: Safety showers provide full-body rinsing.
11. What does the NFPA diamond indicate?
A) Chemical name
B) Hazard ratings
C) Storage location
D) Disposal method
Answer: B
Rationale: NFPA diamond shows health, flammability, reactivity, and special hazards.
12. What is a grab sample?
A) Composite over time
B) Single sample at one time
C) Mixed sample
D) Automatic sample
Answer: B
Rationale: Grab samples represent conditions at a specific moment.
13. What is a composite sample?
A) Single sample
B) Multiple samples combined over time
C) Duplicate sample
D) Blank sample
Answer: B
Rationale: Composite samples represent average conditions over a period.
14. How long can a grab sample be held for pH analysis?
4
Questions with 100% Verified Answers
Complete Solutions UPDATED 2026/2027!!!!!!
1. What is the primary purpose of a laboratory safety program?
A) Increase productivity
B) Protect personnel from hazards
C) Reduce costs
D) Improve accuracy
Answer: B
Rationale: Safety programs protect workers from chemical, biological, and physical hazards.
2. Which document provides information about chemical hazards?
A) Chain of custody
B) Safety Data Sheet (SDS)
C) NPDES permit
D) Standard Methods
Answer: B
Rationale: SDS provides handling, storage, and emergency information for chemicals.
3. What does PPE stand for?
A) Personal Protective Equipment
B) Personal Protective Equipment
C) Public Protection Equipment
D) Primary Protection Equipment
Answer: B
Rationale: PPE includes gloves, goggles, lab coats, and respirators.
,4. When should safety goggles be worn in the laboratory?
A) Only when handling acids
B) At all times
C) Only during titrations
D) Only when instructed
Answer: B
Rationale: Eye protection is required whenever in the laboratory.
5. What is the proper way to dilute concentrated acid?
A) Add water to acid
B) Add acid to water
C) Mix simultaneously
D) Add ice first
Answer: B
Rationale: Adding acid to water prevents violent boiling and splattering.
6. Where should acids be stored?
A) With bases
B) Separately from bases
C) With organics
D) In direct sunlight
Answer: B
Rationale: Acids and bases react violently if mixed.
7. What type of fire extinguisher is used for electrical fires?
A) Water
2
,B) CO2 or dry chemical
C) Foam
D) Sand
Answer: B
Rationale: CO2 and dry chemical are safe for electrical fires.
8. What is the first step if a chemical splashes in your eye?
A) Notify supervisor
B) Flush with water for 15 minutes
C) Apply ointment
D) Close eye tightly
Answer: B
Rationale: Immediate flushing minimizes damage.
9. What is the purpose of an eyewash station?
A) Clean glassware
B) Flush chemicals from eyes
C) Store solutions
D) Wash hands
Answer: B
Rationale: Eyewash stations provide emergency eye flushing.
10. What is the purpose of a safety shower?
A) Clean equipment
B) Rinse chemicals from body
C) Store PPE
D) Water plants
Answer: B
3
, Rationale: Safety showers provide full-body rinsing.
11. What does the NFPA diamond indicate?
A) Chemical name
B) Hazard ratings
C) Storage location
D) Disposal method
Answer: B
Rationale: NFPA diamond shows health, flammability, reactivity, and special hazards.
12. What is a grab sample?
A) Composite over time
B) Single sample at one time
C) Mixed sample
D) Automatic sample
Answer: B
Rationale: Grab samples represent conditions at a specific moment.
13. What is a composite sample?
A) Single sample
B) Multiple samples combined over time
C) Duplicate sample
D) Blank sample
Answer: B
Rationale: Composite samples represent average conditions over a period.
14. How long can a grab sample be held for pH analysis?
4
