ASCP MLT Exam Comprehensive Test Paper 2026 – Complete
Questions, Verified Answers & Detailed Solutions | Medical
Laboratory Technician Certification Practice Exam
Question 1: Which of the following blood additives is most useful for serum collection?
A. Polymer barrier B. Oxalate C. EDTA D. Citrate
Answer: A
Explanation: Oxalate, EDTA, and citrate are anticoagulants that inhibit clot formation.
Question 2: The laboratorian completed the mixing study ordered for John Doe. The results are
as follows:
Initial aPTT result: 167 seconds Initial 1:1 Mix with Normal Pooled Plasma: 158 seconds
Incubated 1:1 Mix with Normal Pooled Plasma: 150 seconds
Which of the choices below would most likely explain the results for this patient?
A. Factor VIII deficiency B. Immediate-acting coagulation inhibitor C. Time/temperature-
dependent coagulation inhibitor D. Factor VII deficiency
Answer: B
Explanation: This patient is most likely suffering from an immediate-acting coagulation
inhibitor; most commonly, lupus anticoagulant. Notice that the addition of normal pooled plasma
does not correct upon initial or incubated mix, which means that the inhibitor is not time or
temperature-dependent.
Factor VIII is not the correct answer as a factor deficiency would have corrected upon the
addition of normal pooled plasma. Factor VII is not the correct answer, as the aPTT assay does
not account for factor VII activity or concentration.
Question 3: Given the following results, what is the immune status of the patient?
HBsAg: positive HBeAg: positive Anti-HBc IgM: positive Anti-HBs: negative
A. Acute infection B. Chronic infection C. Immunization D. Susceptible
Answer: A
,Explanation: HBsAg is positive in acute and chronic Hepatitis B infections, since the antigen is
found on the actual surface of the virus. HBeAg is present in the blood when the hepatitis B
viruses are replicating, indicating an active infection. Anti-HBc IgM is present due to the
immune response to the presence of the hepatitis core antigen and indicates an acute infection.
Anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus
infection, according to the CDC.
Question 4: Which one of the following usually shows a decrease during an acute phase
response?
A. Albumin B. Alpha-1 Antitrypsin C. Fibrinogen D. Ceruloplasmin
Answer: A
Explanation: Albumin is a "negative" acute phase protein since it is found in decreased levels
during acute phase response. Alpha-1-antitrypsin, fibrinogen, and ceruloplasmin are all
"positive" acute phase proteins that are found in increased levels during acute phase response.
Question 5: True/False A pregnant female who received RhIg at 28 weeks gestation has a
positive antibody screen at delivery. If the antibody has been confirmed as anti-D alone and
reacts 1+ in the indirect antiglobulin test with D+ red cells, performing a titration to investigate if
the anti-D is immune is good practice.
Answer: False
Explanation: Because lower titers could be due to both passive and immune anti-D, in the
absence of results that suggest immune anti-D, routine antibody titration is not a good use of
time compared to assuming that anti-D is passive.
Best practice guidelines do NOT recommend routine titration for women known to be injected
with RhIg and exhibiting a 2+ or less reaction with D+ red cells consistent with passive anti-D
from RhIg.
Question 6: Match urine color with substance that might have been responsible:
1. Phosphates
2. Bilirubin
3. Pseudomonas
4. Porphobilinogen
A. Blue to green B. White C. Red to brown D. Yellow
Answers:
1. B
2. D
, 3. A
4. C
Explanation: Red to Brown Urine: porphobilinogen, hematuria, myoglobinuria, etc. Green:
Food colorings; Increased carotene in the diet; Pseudomonas aeruginosa infection Yellow:
bilirubin, bile pigments White: phosphates, other crystals
Question 7: The arrows in the image on the right point to single, long, tapered phialides that
extend laterally from either side of the hyphae. This is an identifying feature of which of the
fungi listed below?
A. Trichoderma species B. Penicillium species C. Beauveria species
Answer: A
Explanation: The production of long, tapered phialides is one of the key identifying features of
Trichoderma species. In contrast, Penicillium species produce phialides with blunt ends. The
phialides of Beauveria species are geniculate, forming a zig-zag pattern.
Question 8: For which of the following antibodies is the DAT most likely to be negative when
testing a newborn for possible HDFN?
A. Anti-A B. Anti-c C. Anti-D D. Anti-K E. Anti-Fya
Answer: A
Explanation: The DAT is most likely to be negative in ABO HDFN. It's possible that the
washing done as part of the DAT may break the bonds between anti-A (or anti-B) and the
newborn's poorly developed A (or B) antigens.
Question 9: General Hospital is considering the addition of a new chemistry panel containing 12
tests. The laboratory is asked to calculate the total cost of quality control per new chemistry test
panel. Quality control must be performed 3 times per day (every 8 hours). The labor cost per
quality control test for this panel is $2.63. A month's worth of quality control reagent costs
$354.00. What is the total quality control cost per new chemistry test panel if 76,000 of these
new panels are performed each year?
A. $0.01 B. $0.09 C. $0.04 D. $1.70
Answer: B
Explanation: This scenario's answer can be calculated by first deciding what the total quality
control labor costs are as well as what the total consumable costs are. In this case, if quality
control is run 3 times per day, a total of 1095 quality control runs are performed each year. The
direct labor cost of $2.63 multiplied by 1095 quality control runs equals $2879.85 per year in
quality control direct labor. The hospital pays $354.00 per month on quality control
Questions, Verified Answers & Detailed Solutions | Medical
Laboratory Technician Certification Practice Exam
Question 1: Which of the following blood additives is most useful for serum collection?
A. Polymer barrier B. Oxalate C. EDTA D. Citrate
Answer: A
Explanation: Oxalate, EDTA, and citrate are anticoagulants that inhibit clot formation.
Question 2: The laboratorian completed the mixing study ordered for John Doe. The results are
as follows:
Initial aPTT result: 167 seconds Initial 1:1 Mix with Normal Pooled Plasma: 158 seconds
Incubated 1:1 Mix with Normal Pooled Plasma: 150 seconds
Which of the choices below would most likely explain the results for this patient?
A. Factor VIII deficiency B. Immediate-acting coagulation inhibitor C. Time/temperature-
dependent coagulation inhibitor D. Factor VII deficiency
Answer: B
Explanation: This patient is most likely suffering from an immediate-acting coagulation
inhibitor; most commonly, lupus anticoagulant. Notice that the addition of normal pooled plasma
does not correct upon initial or incubated mix, which means that the inhibitor is not time or
temperature-dependent.
Factor VIII is not the correct answer as a factor deficiency would have corrected upon the
addition of normal pooled plasma. Factor VII is not the correct answer, as the aPTT assay does
not account for factor VII activity or concentration.
Question 3: Given the following results, what is the immune status of the patient?
HBsAg: positive HBeAg: positive Anti-HBc IgM: positive Anti-HBs: negative
A. Acute infection B. Chronic infection C. Immunization D. Susceptible
Answer: A
,Explanation: HBsAg is positive in acute and chronic Hepatitis B infections, since the antigen is
found on the actual surface of the virus. HBeAg is present in the blood when the hepatitis B
viruses are replicating, indicating an active infection. Anti-HBc IgM is present due to the
immune response to the presence of the hepatitis core antigen and indicates an acute infection.
Anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus
infection, according to the CDC.
Question 4: Which one of the following usually shows a decrease during an acute phase
response?
A. Albumin B. Alpha-1 Antitrypsin C. Fibrinogen D. Ceruloplasmin
Answer: A
Explanation: Albumin is a "negative" acute phase protein since it is found in decreased levels
during acute phase response. Alpha-1-antitrypsin, fibrinogen, and ceruloplasmin are all
"positive" acute phase proteins that are found in increased levels during acute phase response.
Question 5: True/False A pregnant female who received RhIg at 28 weeks gestation has a
positive antibody screen at delivery. If the antibody has been confirmed as anti-D alone and
reacts 1+ in the indirect antiglobulin test with D+ red cells, performing a titration to investigate if
the anti-D is immune is good practice.
Answer: False
Explanation: Because lower titers could be due to both passive and immune anti-D, in the
absence of results that suggest immune anti-D, routine antibody titration is not a good use of
time compared to assuming that anti-D is passive.
Best practice guidelines do NOT recommend routine titration for women known to be injected
with RhIg and exhibiting a 2+ or less reaction with D+ red cells consistent with passive anti-D
from RhIg.
Question 6: Match urine color with substance that might have been responsible:
1. Phosphates
2. Bilirubin
3. Pseudomonas
4. Porphobilinogen
A. Blue to green B. White C. Red to brown D. Yellow
Answers:
1. B
2. D
, 3. A
4. C
Explanation: Red to Brown Urine: porphobilinogen, hematuria, myoglobinuria, etc. Green:
Food colorings; Increased carotene in the diet; Pseudomonas aeruginosa infection Yellow:
bilirubin, bile pigments White: phosphates, other crystals
Question 7: The arrows in the image on the right point to single, long, tapered phialides that
extend laterally from either side of the hyphae. This is an identifying feature of which of the
fungi listed below?
A. Trichoderma species B. Penicillium species C. Beauveria species
Answer: A
Explanation: The production of long, tapered phialides is one of the key identifying features of
Trichoderma species. In contrast, Penicillium species produce phialides with blunt ends. The
phialides of Beauveria species are geniculate, forming a zig-zag pattern.
Question 8: For which of the following antibodies is the DAT most likely to be negative when
testing a newborn for possible HDFN?
A. Anti-A B. Anti-c C. Anti-D D. Anti-K E. Anti-Fya
Answer: A
Explanation: The DAT is most likely to be negative in ABO HDFN. It's possible that the
washing done as part of the DAT may break the bonds between anti-A (or anti-B) and the
newborn's poorly developed A (or B) antigens.
Question 9: General Hospital is considering the addition of a new chemistry panel containing 12
tests. The laboratory is asked to calculate the total cost of quality control per new chemistry test
panel. Quality control must be performed 3 times per day (every 8 hours). The labor cost per
quality control test for this panel is $2.63. A month's worth of quality control reagent costs
$354.00. What is the total quality control cost per new chemistry test panel if 76,000 of these
new panels are performed each year?
A. $0.01 B. $0.09 C. $0.04 D. $1.70
Answer: B
Explanation: This scenario's answer can be calculated by first deciding what the total quality
control labor costs are as well as what the total consumable costs are. In this case, if quality
control is run 3 times per day, a total of 1095 quality control runs are performed each year. The
direct labor cost of $2.63 multiplied by 1095 quality control runs equals $2879.85 per year in
quality control direct labor. The hospital pays $354.00 per month on quality control
