ASCP MLT EXAM TEST BANK 2026/2027 PRACTICE QUESTIONS AND A
NEW UPDATED STUDY GUIDE ACCURATE EXAM COMPLETE APPROVED
QUESTIONS AND CORRECT DETAILED ANSWERS
1. A 62-year-old patient with fatigue, pallor, and exertional dyspnea has a CBC
showing hemoglobin 8.1 g/dL, MCV 68 fL, MCH decreased, and increased
RDW. The peripheral smear demonstrates hypochromic microcytic
erythrocytes with anisopoikilocytosis. Which additional laboratory finding
would most strongly support iron deficiency as the underlying cause of this
patient's anemia?
A. Increased serum ferritin with decreased total iron-binding capacity
B. Decreased serum ferritin with increased total iron-binding capacity
C. Increased serum iron with decreased transferrin saturation
D. Normal ferritin with markedly increased vitamin B12 concentration
Answer: B
2. A patient with suspected acute bacterial meningitis has cerebrospinal fluid
collected for laboratory evaluation. The specimen appears cloudy, the
nucleated cell count is markedly increased with neutrophil predominance,
protein is elevated, and glucose is decreased compared with serum glucose.
Which laboratory pattern is most consistent with this presentation?
A. Viral meningitis
B. Fungal meningitis
C. Bacterial meningitis
D. Noninfectious traumatic tap
Answer: C
3. A blood bank technologist performs forward and reverse ABO typing on a
patient's specimen. The patient's red cells react strongly with anti-A and
anti-D but not anti-B, while the patient's plasma reacts strongly with B
reagent cells but not A1 reagent cells. Which ABO/Rh interpretation is most
appropriate?
A. Group A, Rh positive
B. Group B, Rh positive
1
, C. Group AB, Rh negative
D. Group O, Rh positive
Answer: A
4. A serum specimen from a patient with suspected myocardial injury is
analyzed for cardiac biomarkers. The laboratory wants the most specific
commonly used biomarker for myocardial tissue injury and recognizes that
concentrations may also be interpreted according to the clinical timing of
symptom onset. Which analyte is most appropriate?
A. Alkaline phosphatase
B. Amylase
C. Troponin
D. Gamma-glutamyl transferase
Answer: C
5. A urine specimen is submitted for routine urinalysis after being collected
from a patient with suspected urinary tract infection. The reagent strip is
positive for leukocyte esterase and nitrite, and microscopic examination
demonstrates numerous leukocytes and bacteria. Which organism is
particularly associated with a positive nitrite reaction because it reduces
nitrate to nitrite?
A. Escherichia coli
B. Candida albicans
C. Staphylococcus saprophyticus
D. Enterococcus faecalis
Answer: A
6. A patient presents with prolonged bleeding after a minor procedure.
Laboratory testing demonstrates a prolonged activated partial
thromboplastin time with a normal prothrombin time. Which portion of the
coagulation system is primarily assessed by the activated partial
thromboplastin time?
A. Extrinsic pathway only
B. Intrinsic and common pathways
2
, C. Platelet adhesion only
D. Fibrinolytic pathway only
Answer: B
7. A Gram stain is performed on a pure culture isolated from a wound. The
organisms appear as gram-positive cocci arranged in clusters and produce
catalase. Which additional test is most appropriate for distinguishing
Staphylococcus aureus from coagulase-negative staphylococci?
A. Oxidase
B. Indole
C. Coagulase
D. Urease
Answer: C
8. A patient with severe dehydration has a serum sodium concentration of 154
mmol/L and serum osmolality of 320 mOsm/kg. The laboratory report
should recognize that serum osmolality is most directly influenced by the
concentration of which major measured solutes?
A. Calcium and albumin
B. Sodium, glucose, and urea
C. Bilirubin and phosphate
D. ALT and AST
Answer: B
9. A technologist receives a lavender-top tube for a CBC and notices that the
specimen contains several visible clots. The patient's platelet count is
unexpectedly low, although the patient has no clinical signs of
thrombocytopenia. What is the most appropriate laboratory action?
A. Report the platelet count without comment
B. Warm the specimen and rerun it
C. Reject the specimen and request a properly collected replacement
D. Dilute the specimen with saline
Answer: C
3
, 10. A patient develops fever, chills, hypotension, and flank discomfort shortly
after receiving a unit of red blood cells. The blood bank investigation reveals
an incompatible crossmatch and evidence of intravascular hemolysis. Which
transfusion reaction should be suspected?
A. Acute hemolytic transfusion reaction
B. Delayed hemolytic transfusion reaction
C. Allergic transfusion reaction
D. Febrile nonhemolytic transfusion reaction
Answer: A
11. A patient with chronic liver disease has prolonged PT and a prolonged aPTT,
decreased albumin, and increased bilirubin. Which laboratory finding is
most directly associated with impaired hepatic synthesis of coagulation
factors?
A. Decreased PT
B. Increased INR
C. Decreased bilirubin
D. Increased platelet production
Answer: B
12. A respiratory specimen from a patient with suspected tuberculosis is
submitted for acid-fast staining. The laboratory technologist observes
slender red organisms against a contrasting background after Ziehl-Neelsen
staining. Which organism is most consistent with this finding?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Candida glabrata
D. Cryptococcus neoformans
Answer: B
13. A patient with uncontrolled diabetes mellitus has a serum glucose
concentration of 480 mg/dL, metabolic acidosis, increased anion gap, and
positive serum ketones. Which condition best explains this laboratory
profile?
4
NEW UPDATED STUDY GUIDE ACCURATE EXAM COMPLETE APPROVED
QUESTIONS AND CORRECT DETAILED ANSWERS
1. A 62-year-old patient with fatigue, pallor, and exertional dyspnea has a CBC
showing hemoglobin 8.1 g/dL, MCV 68 fL, MCH decreased, and increased
RDW. The peripheral smear demonstrates hypochromic microcytic
erythrocytes with anisopoikilocytosis. Which additional laboratory finding
would most strongly support iron deficiency as the underlying cause of this
patient's anemia?
A. Increased serum ferritin with decreased total iron-binding capacity
B. Decreased serum ferritin with increased total iron-binding capacity
C. Increased serum iron with decreased transferrin saturation
D. Normal ferritin with markedly increased vitamin B12 concentration
Answer: B
2. A patient with suspected acute bacterial meningitis has cerebrospinal fluid
collected for laboratory evaluation. The specimen appears cloudy, the
nucleated cell count is markedly increased with neutrophil predominance,
protein is elevated, and glucose is decreased compared with serum glucose.
Which laboratory pattern is most consistent with this presentation?
A. Viral meningitis
B. Fungal meningitis
C. Bacterial meningitis
D. Noninfectious traumatic tap
Answer: C
3. A blood bank technologist performs forward and reverse ABO typing on a
patient's specimen. The patient's red cells react strongly with anti-A and
anti-D but not anti-B, while the patient's plasma reacts strongly with B
reagent cells but not A1 reagent cells. Which ABO/Rh interpretation is most
appropriate?
A. Group A, Rh positive
B. Group B, Rh positive
1
, C. Group AB, Rh negative
D. Group O, Rh positive
Answer: A
4. A serum specimen from a patient with suspected myocardial injury is
analyzed for cardiac biomarkers. The laboratory wants the most specific
commonly used biomarker for myocardial tissue injury and recognizes that
concentrations may also be interpreted according to the clinical timing of
symptom onset. Which analyte is most appropriate?
A. Alkaline phosphatase
B. Amylase
C. Troponin
D. Gamma-glutamyl transferase
Answer: C
5. A urine specimen is submitted for routine urinalysis after being collected
from a patient with suspected urinary tract infection. The reagent strip is
positive for leukocyte esterase and nitrite, and microscopic examination
demonstrates numerous leukocytes and bacteria. Which organism is
particularly associated with a positive nitrite reaction because it reduces
nitrate to nitrite?
A. Escherichia coli
B. Candida albicans
C. Staphylococcus saprophyticus
D. Enterococcus faecalis
Answer: A
6. A patient presents with prolonged bleeding after a minor procedure.
Laboratory testing demonstrates a prolonged activated partial
thromboplastin time with a normal prothrombin time. Which portion of the
coagulation system is primarily assessed by the activated partial
thromboplastin time?
A. Extrinsic pathway only
B. Intrinsic and common pathways
2
, C. Platelet adhesion only
D. Fibrinolytic pathway only
Answer: B
7. A Gram stain is performed on a pure culture isolated from a wound. The
organisms appear as gram-positive cocci arranged in clusters and produce
catalase. Which additional test is most appropriate for distinguishing
Staphylococcus aureus from coagulase-negative staphylococci?
A. Oxidase
B. Indole
C. Coagulase
D. Urease
Answer: C
8. A patient with severe dehydration has a serum sodium concentration of 154
mmol/L and serum osmolality of 320 mOsm/kg. The laboratory report
should recognize that serum osmolality is most directly influenced by the
concentration of which major measured solutes?
A. Calcium and albumin
B. Sodium, glucose, and urea
C. Bilirubin and phosphate
D. ALT and AST
Answer: B
9. A technologist receives a lavender-top tube for a CBC and notices that the
specimen contains several visible clots. The patient's platelet count is
unexpectedly low, although the patient has no clinical signs of
thrombocytopenia. What is the most appropriate laboratory action?
A. Report the platelet count without comment
B. Warm the specimen and rerun it
C. Reject the specimen and request a properly collected replacement
D. Dilute the specimen with saline
Answer: C
3
, 10. A patient develops fever, chills, hypotension, and flank discomfort shortly
after receiving a unit of red blood cells. The blood bank investigation reveals
an incompatible crossmatch and evidence of intravascular hemolysis. Which
transfusion reaction should be suspected?
A. Acute hemolytic transfusion reaction
B. Delayed hemolytic transfusion reaction
C. Allergic transfusion reaction
D. Febrile nonhemolytic transfusion reaction
Answer: A
11. A patient with chronic liver disease has prolonged PT and a prolonged aPTT,
decreased albumin, and increased bilirubin. Which laboratory finding is
most directly associated with impaired hepatic synthesis of coagulation
factors?
A. Decreased PT
B. Increased INR
C. Decreased bilirubin
D. Increased platelet production
Answer: B
12. A respiratory specimen from a patient with suspected tuberculosis is
submitted for acid-fast staining. The laboratory technologist observes
slender red organisms against a contrasting background after Ziehl-Neelsen
staining. Which organism is most consistent with this finding?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Candida glabrata
D. Cryptococcus neoformans
Answer: B
13. A patient with uncontrolled diabetes mellitus has a serum glucose
concentration of 480 mg/dL, metabolic acidosis, increased anion gap, and
positive serum ketones. Which condition best explains this laboratory
profile?
4
