Page 1 of 140
LAB EXAM / LATEST LAB EXAM APRIL 2026
ACTUAL TEST REAL QUESTIONS AND
COMPLETE CURRENT QUESTIONS WITH
RELIABLE ANSWERS (100% CORRECT
VERIFIED SOLUTIONS) A NEW UPDATED
VERSION 2026 EDITION |GUARANTEED
PASS |FULL REVISED LAB EXAM
Q1. A technologist spills a large amount of blood on the floor.
What is the first action?
A) Notify the supervisor
B) Cover with absorbent material and apply disinfectant
C) Wipe with a dry cloth
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D) Evacuate the lab
Answer: B – Absorbent material limits spread; disinfectant
(e.g., 1:10 bleach) follows. Safety first contains spill. A comes
after containment.
Q2. Which class of fire extinguisher is used for electrical fires?
A) Class A
B) Class B
C) Class C
D) Class D
Answer: C – Class C for energized electrical equipment. Class
A (ordinary combustibles), B (flammable liquids), D (metals).
Q3. A quality control result is 2 SD from the mean. You should:
A) Report patient results
B) Recalibrate immediately
C) Repeat QC; if still out, troubleshoot
D) Change reagent lot
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Answer: C – Westgard rules: 2SD is a warning; repeat QC
first.
Q4. Which of the following is a CLIA-waived test?
A) Complete blood count
B) Dipstick urinalysis
C) Blood culture
D) Crossmatch
Answer: B – Dipstick UA is simple, low risk. CBC, culture,
crossmatch are moderate/high complexity.
Q5. A biosafety cabinet (BSC) should be recertified:
A) Monthly
B) Every 6 months
C) Annually
D) Only after moving
Answer: C – Annual recertification is standard; also after
moving or filter change.
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Q6. Which chemical requires use of a fume hood?
A) Saline
B) Ethanol (70%)
C) Glutaraldehyde
D) EDTA
Answer: C – Glutaraldehyde is a volatile irritant; hood
required. Ethanol 70% is low risk.
Q7. A lab receives a result that is 4 SD from the mean. This
violates:
A) 1₂s
B) 2₂s
C) R₄s
D) 4₁s
Answer: C – R₄s (range 4 SD) means two controls differ by
>4 SD; indicates random error.
Q8. The purpose of a logbook for temperature monitoring is:
A) Regulatory requirement only
LAB EXAM / LATEST LAB EXAM APRIL 2026
ACTUAL TEST REAL QUESTIONS AND
COMPLETE CURRENT QUESTIONS WITH
RELIABLE ANSWERS (100% CORRECT
VERIFIED SOLUTIONS) A NEW UPDATED
VERSION 2026 EDITION |GUARANTEED
PASS |FULL REVISED LAB EXAM
Q1. A technologist spills a large amount of blood on the floor.
What is the first action?
A) Notify the supervisor
B) Cover with absorbent material and apply disinfectant
C) Wipe with a dry cloth
,Page 2 of 140
D) Evacuate the lab
Answer: B – Absorbent material limits spread; disinfectant
(e.g., 1:10 bleach) follows. Safety first contains spill. A comes
after containment.
Q2. Which class of fire extinguisher is used for electrical fires?
A) Class A
B) Class B
C) Class C
D) Class D
Answer: C – Class C for energized electrical equipment. Class
A (ordinary combustibles), B (flammable liquids), D (metals).
Q3. A quality control result is 2 SD from the mean. You should:
A) Report patient results
B) Recalibrate immediately
C) Repeat QC; if still out, troubleshoot
D) Change reagent lot
,Page 3 of 140
Answer: C – Westgard rules: 2SD is a warning; repeat QC
first.
Q4. Which of the following is a CLIA-waived test?
A) Complete blood count
B) Dipstick urinalysis
C) Blood culture
D) Crossmatch
Answer: B – Dipstick UA is simple, low risk. CBC, culture,
crossmatch are moderate/high complexity.
Q5. A biosafety cabinet (BSC) should be recertified:
A) Monthly
B) Every 6 months
C) Annually
D) Only after moving
Answer: C – Annual recertification is standard; also after
moving or filter change.
, Page 4 of 140
Q6. Which chemical requires use of a fume hood?
A) Saline
B) Ethanol (70%)
C) Glutaraldehyde
D) EDTA
Answer: C – Glutaraldehyde is a volatile irritant; hood
required. Ethanol 70% is low risk.
Q7. A lab receives a result that is 4 SD from the mean. This
violates:
A) 1₂s
B) 2₂s
C) R₄s
D) 4₁s
Answer: C – R₄s (range 4 SD) means two controls differ by
>4 SD; indicates random error.
Q8. The purpose of a logbook for temperature monitoring is:
A) Regulatory requirement only
