LADWP Meter Reader Exam — Class 1611 Newest Evaluated
Exam Practice Study Guide
This comprehensive study resource serves as a high-yield test bank specifically
engineered for candidates preparing for the Los Angeles Department of Water and
Power (LADWP) Class 1611 Meter Reader Examination. It features realistic, exam-
style practice questions accompanied by 100% verified correct answers and detailed
civil-service rationales covering essential field operations. Reviewing these materials
will ensure you master vital competencies—such as reading multi-dial analog electric
meters from right to left, computing water consumption math in units of 100 cubic feet,
identifying field safety hazards, and properly logging data into handheld route
computers
Section 1: General Laboratory (Questions 1–50)
1. A technologist receives a blood specimen labeled with only the patient's last
name. What is the most appropriate action?
A) Accept the specimen and test it
B) Reject the specimen and request a properly labeled sample
C) Call the patient to confirm identity
D) Label the tube with the patient's first name
Answer: B
Rationale: Specimens must have at least two unique identifiers. A specimen labeled with
only a last name is unacceptable and must be rejected to prevent misidentification .
2. Which federal regulation mandates that all clinical laboratories performing
testing on human specimens must be certified?
,A) OSHA
B) HIPAA
C) CLIA '88
D) FDA
Answer: C
Rationale: CLIA '88 established quality standards for all laboratory testing to ensure
accuracy, reliability, and timeliness of patient test results .
3. A Levey-Jennings chart shows 6 consecutive control values falling on the same
side of the mean. This pattern is best described as:
A) Shift
B) Trend
C) Random error
D) Outlier
Answer: B
Rationale: A trend is defined as 6 or more consecutive control values that consistently
increase or decrease in one direction .
4. The term that describes the closeness of a measured value to the true value is:
A) Precision
B) Accuracy
C) Reliability
D) Specificity
Answer: B
Rationale: Accuracy refers to how close a measured value is to the true or accepted value.
Precision refers to reproducibility .
5. A technologist is performing a manual differential and observes uneven staining
with pink edges and blue centers. The most likely cause is:
A) Prolonged fixation
B) Inadequate drying of the smear
C) Buffers with incorrect pH
D) Excessive staining time
,Answer: C
Rationale: Uneven staining with pink edges and blue centers (pH artifact) is caused by
buffers with incorrect pH .
6. According to CLSI guidelines, which of the following is the correct order of draw
for venipuncture?
A) Light blue → Red → Green → Lavender → Gray
B) Red → Light blue → Green → Lavender → Gray
C) Yellow → Light blue → Red → Green → Lavender
D) Lavender → Green → Red → Light blue → Gray
Answer: A
Rationale: The correct order is: Blood culture bottles (yellow) → Light blue (sodium citrate)
→ Red (serum) → Green (heparin) → Lavender (EDTA) → Gray (oxalate/fluoride) .
7. The Westgard multirule "1₃s" rule is violated when:
A) One control value exceeds the mean by 3 standard deviations
B) Two consecutive control values exceed the mean by 2 standard deviations
C) Four consecutive control values are on the same side of the mean
D) Ten consecutive control values are on the same side of the mean
Answer: A
Rationale: The 1₃s rule is violated when a single control value exceeds the mean by ±3
standard deviations, indicating random error .
8. Which of the following is an example of a preanalytical error?
A) Reagent contamination
B) Incorrect calibration of an instrument
C) Hemolyzed specimen
D) Data entry error
Answer: C
Rationale: Preanalytical errors occur before the specimen is analyzed and include
specimen collection, handling, and transport issues .
9. The SDS (Safety Data Sheet) for a chemical reagent must contain information
about:
, A) The chemical's physical and health hazards
B) Safe handling and storage procedures
C) Emergency control measures
D) All of the above
Answer: D
Rationale: Safety Data Sheets provide comprehensive information about chemical
substances including hazards, safe handling, emergency measures, and disposal .
10. The Beer-Lambert Law states that absorbance is directly proportional to:
A) Path length and concentration
B) Path length only
C) Concentration only
D) Temperature and pressure
Answer: A
Rationale: The Beer-Lambert Law states that absorbance is directly proportional to both
the path length and the concentration of the absorbing substance .
11. Which of the following is the correct formula for calculating absorbance from
percent transmission?
A) 2 - log10 %T
B) 2 + log10 %T
C) log10 %T - 2
D) log10 %T + 2
Answer: A
Rationale: Absorbance can be calculated from percent transmission using 2 - log10 %T. If
all light passes through, absorbance is zero and %T is 100% .
12. What is a substance or constituent in which the laboratory conducts testing?
A) A solution
B) An additive
C) An analyte
D) An anticoagulant
Answer: C
Exam Practice Study Guide
This comprehensive study resource serves as a high-yield test bank specifically
engineered for candidates preparing for the Los Angeles Department of Water and
Power (LADWP) Class 1611 Meter Reader Examination. It features realistic, exam-
style practice questions accompanied by 100% verified correct answers and detailed
civil-service rationales covering essential field operations. Reviewing these materials
will ensure you master vital competencies—such as reading multi-dial analog electric
meters from right to left, computing water consumption math in units of 100 cubic feet,
identifying field safety hazards, and properly logging data into handheld route
computers
Section 1: General Laboratory (Questions 1–50)
1. A technologist receives a blood specimen labeled with only the patient's last
name. What is the most appropriate action?
A) Accept the specimen and test it
B) Reject the specimen and request a properly labeled sample
C) Call the patient to confirm identity
D) Label the tube with the patient's first name
Answer: B
Rationale: Specimens must have at least two unique identifiers. A specimen labeled with
only a last name is unacceptable and must be rejected to prevent misidentification .
2. Which federal regulation mandates that all clinical laboratories performing
testing on human specimens must be certified?
,A) OSHA
B) HIPAA
C) CLIA '88
D) FDA
Answer: C
Rationale: CLIA '88 established quality standards for all laboratory testing to ensure
accuracy, reliability, and timeliness of patient test results .
3. A Levey-Jennings chart shows 6 consecutive control values falling on the same
side of the mean. This pattern is best described as:
A) Shift
B) Trend
C) Random error
D) Outlier
Answer: B
Rationale: A trend is defined as 6 or more consecutive control values that consistently
increase or decrease in one direction .
4. The term that describes the closeness of a measured value to the true value is:
A) Precision
B) Accuracy
C) Reliability
D) Specificity
Answer: B
Rationale: Accuracy refers to how close a measured value is to the true or accepted value.
Precision refers to reproducibility .
5. A technologist is performing a manual differential and observes uneven staining
with pink edges and blue centers. The most likely cause is:
A) Prolonged fixation
B) Inadequate drying of the smear
C) Buffers with incorrect pH
D) Excessive staining time
,Answer: C
Rationale: Uneven staining with pink edges and blue centers (pH artifact) is caused by
buffers with incorrect pH .
6. According to CLSI guidelines, which of the following is the correct order of draw
for venipuncture?
A) Light blue → Red → Green → Lavender → Gray
B) Red → Light blue → Green → Lavender → Gray
C) Yellow → Light blue → Red → Green → Lavender
D) Lavender → Green → Red → Light blue → Gray
Answer: A
Rationale: The correct order is: Blood culture bottles (yellow) → Light blue (sodium citrate)
→ Red (serum) → Green (heparin) → Lavender (EDTA) → Gray (oxalate/fluoride) .
7. The Westgard multirule "1₃s" rule is violated when:
A) One control value exceeds the mean by 3 standard deviations
B) Two consecutive control values exceed the mean by 2 standard deviations
C) Four consecutive control values are on the same side of the mean
D) Ten consecutive control values are on the same side of the mean
Answer: A
Rationale: The 1₃s rule is violated when a single control value exceeds the mean by ±3
standard deviations, indicating random error .
8. Which of the following is an example of a preanalytical error?
A) Reagent contamination
B) Incorrect calibration of an instrument
C) Hemolyzed specimen
D) Data entry error
Answer: C
Rationale: Preanalytical errors occur before the specimen is analyzed and include
specimen collection, handling, and transport issues .
9. The SDS (Safety Data Sheet) for a chemical reagent must contain information
about:
, A) The chemical's physical and health hazards
B) Safe handling and storage procedures
C) Emergency control measures
D) All of the above
Answer: D
Rationale: Safety Data Sheets provide comprehensive information about chemical
substances including hazards, safe handling, emergency measures, and disposal .
10. The Beer-Lambert Law states that absorbance is directly proportional to:
A) Path length and concentration
B) Path length only
C) Concentration only
D) Temperature and pressure
Answer: A
Rationale: The Beer-Lambert Law states that absorbance is directly proportional to both
the path length and the concentration of the absorbing substance .
11. Which of the following is the correct formula for calculating absorbance from
percent transmission?
A) 2 - log10 %T
B) 2 + log10 %T
C) log10 %T - 2
D) log10 %T + 2
Answer: A
Rationale: Absorbance can be calculated from percent transmission using 2 - log10 %T. If
all light passes through, absorbance is zero and %T is 100% .
12. What is a substance or constituent in which the laboratory conducts testing?
A) A solution
B) An additive
C) An analyte
D) An anticoagulant
Answer: C
