WA HOSA Clinical Laboratory Science Exam 2026/2027 |
Complete Practice Questions, Correct Answers & Detailed
Rationales
Section 1 — Clinical Laboratory Professions & Laboratory
Fundamentals
1.
Which professional is primarily trained to perform laboratory testing on
patient specimens and analyze the resulting data?
A. Medical laboratory scientist
B. Medical receptionist
C. Radiologic technologist
D. Dental assistant
Correct Answer: A
Rationale: A medical laboratory scientist performs complex laboratory
testing, analyzes specimens, evaluates results, and contributes to
diagnosis and treatment.
2.
Which laboratory professional is specifically trained to collect blood
specimens for laboratory testing?
A. Histotechnologist
B. Phlebotomy technician
C. Cytotechnologist
D. Pathologist
,Correct Answer: B
Rationale: A phlebotomy technician specializes in obtaining blood
specimens by venipuncture and other approved collection methods.
3.
A pathologist is best described as a physician who primarily:
A. Performs patient registration
B. Interprets laboratory and tissue findings for diagnosis
C. Collects all patient specimens
D. Maintains laboratory refrigerators
Correct Answer: B
Rationale: Pathologists are physicians who diagnose disease using
laboratory, pathology, and related findings.
4.
Which laboratory area is primarily concerned with blood cells and
blood-forming tissues?
A. Hematology
B. Urinalysis
C. Parasitology
D. Immunology
Correct Answer: A
Rationale: Hematology focuses on blood cells, blood disorders, and
hematopoietic processes.
5.
Which discipline studies microorganisms that can cause disease?
,A. Clinical chemistry
B. Microbiology
C. Hematology
D. Histology
Correct Answer: B
Rationale: Microbiology involves the study and identification of
microorganisms, including bacteria, fungi, viruses, and certain parasites.
6.
Which department commonly analyzes electrolytes, enzymes, glucose,
and other chemical constituents of blood?
A. Clinical chemistry
B. Hematology
C. Cytology
D. Microbiology
Correct Answer: A
Rationale: Clinical chemistry measures chemical substances in blood
and other body fluids.
7.
Which laboratory discipline focuses on antigen-antibody reactions?
A. Immunology
B. Hematology
C. Urinalysis
D. Histology
, Correct Answer: A
Rationale: Immunology examines immune responses, including
reactions involving antigens and antibodies.
8.
What is the primary purpose of a laboratory quality-control program?
A. Increase specimen volume
B. Ensure reliable and accurate test results
C. Reduce documentation
D. Eliminate the need for calibration
Correct Answer: B
Rationale: Quality control detects analytical problems and helps ensure
test results are accurate, precise, and dependable.
9.
What is accuracy?
A. Closeness of a result to the true value
B. Ability to obtain the same result repeatedly
C. Speed of testing
D. Amount of specimen collected
Correct Answer: A
Rationale: Accuracy describes how close a measurement is to the
accepted or true value.
10.
Precision refers to:
Complete Practice Questions, Correct Answers & Detailed
Rationales
Section 1 — Clinical Laboratory Professions & Laboratory
Fundamentals
1.
Which professional is primarily trained to perform laboratory testing on
patient specimens and analyze the resulting data?
A. Medical laboratory scientist
B. Medical receptionist
C. Radiologic technologist
D. Dental assistant
Correct Answer: A
Rationale: A medical laboratory scientist performs complex laboratory
testing, analyzes specimens, evaluates results, and contributes to
diagnosis and treatment.
2.
Which laboratory professional is specifically trained to collect blood
specimens for laboratory testing?
A. Histotechnologist
B. Phlebotomy technician
C. Cytotechnologist
D. Pathologist
,Correct Answer: B
Rationale: A phlebotomy technician specializes in obtaining blood
specimens by venipuncture and other approved collection methods.
3.
A pathologist is best described as a physician who primarily:
A. Performs patient registration
B. Interprets laboratory and tissue findings for diagnosis
C. Collects all patient specimens
D. Maintains laboratory refrigerators
Correct Answer: B
Rationale: Pathologists are physicians who diagnose disease using
laboratory, pathology, and related findings.
4.
Which laboratory area is primarily concerned with blood cells and
blood-forming tissues?
A. Hematology
B. Urinalysis
C. Parasitology
D. Immunology
Correct Answer: A
Rationale: Hematology focuses on blood cells, blood disorders, and
hematopoietic processes.
5.
Which discipline studies microorganisms that can cause disease?
,A. Clinical chemistry
B. Microbiology
C. Hematology
D. Histology
Correct Answer: B
Rationale: Microbiology involves the study and identification of
microorganisms, including bacteria, fungi, viruses, and certain parasites.
6.
Which department commonly analyzes electrolytes, enzymes, glucose,
and other chemical constituents of blood?
A. Clinical chemistry
B. Hematology
C. Cytology
D. Microbiology
Correct Answer: A
Rationale: Clinical chemistry measures chemical substances in blood
and other body fluids.
7.
Which laboratory discipline focuses on antigen-antibody reactions?
A. Immunology
B. Hematology
C. Urinalysis
D. Histology
, Correct Answer: A
Rationale: Immunology examines immune responses, including
reactions involving antigens and antibodies.
8.
What is the primary purpose of a laboratory quality-control program?
A. Increase specimen volume
B. Ensure reliable and accurate test results
C. Reduce documentation
D. Eliminate the need for calibration
Correct Answer: B
Rationale: Quality control detects analytical problems and helps ensure
test results are accurate, precise, and dependable.
9.
What is accuracy?
A. Closeness of a result to the true value
B. Ability to obtain the same result repeatedly
C. Speed of testing
D. Amount of specimen collected
Correct Answer: A
Rationale: Accuracy describes how close a measurement is to the
accepted or true value.
10.
Precision refers to:
