MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
SECTION 1: BLOOD BANKING (17 Questions)
Questions 1-17
Question 1
A patient's direct antiglobulin test (DAT) gives the following results: Polyspecific: +, IgG: +, C3b: 0. These
results are MOST consistent with which condition?
A) Warm autoimmune hemolytic anemia
B) Cold autoimmune hemolytic anemia
C) Complement deficiency
D) Immunosuppressant therapy
Correct Answer: A
Rationale: A positive DAT with IgG only is characteristic of warm autoimmune hemolytic anemia (WAIHA).
In WAIHA, IgG antibodies coat red blood cells, leading to extravascular hemolysis in the spleen. Cold
autoimmune hemolytic anemia would show C3 positivity, and complement deficiency would show negative
DAT results.
Question 2
Which of the following potential donors would be ACCEPTABLE for donation of whole blood?
A) An individual who had a tattoo applied 2 months ago
B) A phlebotomist with a needle stick injury 10 months ago
C) An individual who immigrated from Great Britain 6 months ago
D) An 18-year-old male taking antibiotics for severe acne
Correct Answer: D
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
Rationale: Taking antibiotics for acne is not a disqualifying condition for blood donation. Tattoo requires a 3-
month waiting period in most states. Needle stick injury requires a 12-month waiting period. Individuals who
lived in Great Britain during the mad cow disease outbreak (1980-1996) may be deferred indefinitely.
Question 3
A unit of blood was transferred to a transfusing facility. The unit of blood should be returned to the collecting
facility if the temperature is:
A) 6°C
B) 8°C
C) 10°C
D) 12°C
Correct Answer: D
Rationale: Blood units must be stored at 1-6°C. If the temperature exceeds 10°C, the unit is considered
compromised. A temperature of 12°C exceeds acceptable limits and the unit should be returned.
Question 4
A DAT profile gave the following results: Polyspecific: +, IgG: +, C3b: 0. These results are MOST consistent
with:
A) Warm autoimmune hemolytic anemia
B) Cold autoimmune hemolytic anemia
C) Complement deficiency
D) Immunosuppressant
Correct Answer: A
Rationale: A positive DAT with IgG only is characteristic of warm autoimmune hemolytic anemia. Cold
autoimmune hemolytic anemia typically shows C3 positivity. Complement deficiency would yield negative
DAT results.
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
Question 5
A pregnant woman with active syphilis has an RPR of 1:32 and is being treated with penicillin. Her newborn's
cord blood RPR is 1:2. What is the MOST appropriate interpretation?
A) The baby has congenital syphilis
B) The baby does not have syphilis; this titer represents passive antibody transfer from the mother
C) The baby does not have syphilis; this titer represents a biological false positive
D) No definitive conclusion can be made without further testing
Correct Answer: D
Rationale: A low titer of 1:2 in cord blood could represent passive transfer of maternal antibodies rather than
congenital infection. Further testing (infant serum RPR or IgM testing) is needed to distinguish between
passive antibody transfer and true congenital infection.
Question 6
Which ABO phenotype is considered the "universal donor" for red blood cell transfusions?
A) A positive
B) B positive
C) AB positive
D) O negative
Correct Answer: D
Rationale: O negative red blood cells lack A, B, and Rh antigens, making them compatible with all ABO and
Rh types. This is why O negative blood is used in emergencies when the patient's blood type is unknown.
Question 7
Which of the following is the MOST common cause of transfusion-associated circulatory overload (TACO)?
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
A) Transfusion of ABO-incompatible blood
B) Rapid or excessive transfusion volume in a susceptible patient
C) Bacterial contamination of blood products
D) Allergic reaction to plasma proteins
Correct Answer: B
Rationale: TACO is caused by rapid or excessive transfusion volume leading to fluid overload, particularly in
patients with compromised cardiac or renal function. The key is to transfuse at an appropriate rate and
monitor for signs of volume overload.
Question 8
What is the primary antibody screen used to detect?
A) ABO antibodies
B) Rh antibodies
C) Unexpected red cell antibodies
D) Platelet antibodies
Correct Answer: C
Rationale: The antibody screen detects unexpected (atypical) red blood cell antibodies in patient serum, which
could cause hemolytic transfusion reactions. ABO and Rh antibodies are expected based on the patient's blood
type.
Question 9
A patient has a positive antibody screen. The antibody is identified as anti-Kell. Which of the following is the
MOST appropriate action?
A) Issue K-positive blood
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
SECTION 1: BLOOD BANKING (17 Questions)
Questions 1-17
Question 1
A patient's direct antiglobulin test (DAT) gives the following results: Polyspecific: +, IgG: +, C3b: 0. These
results are MOST consistent with which condition?
A) Warm autoimmune hemolytic anemia
B) Cold autoimmune hemolytic anemia
C) Complement deficiency
D) Immunosuppressant therapy
Correct Answer: A
Rationale: A positive DAT with IgG only is characteristic of warm autoimmune hemolytic anemia (WAIHA).
In WAIHA, IgG antibodies coat red blood cells, leading to extravascular hemolysis in the spleen. Cold
autoimmune hemolytic anemia would show C3 positivity, and complement deficiency would show negative
DAT results.
Question 2
Which of the following potential donors would be ACCEPTABLE for donation of whole blood?
A) An individual who had a tattoo applied 2 months ago
B) A phlebotomist with a needle stick injury 10 months ago
C) An individual who immigrated from Great Britain 6 months ago
D) An 18-year-old male taking antibiotics for severe acne
Correct Answer: D
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
Rationale: Taking antibiotics for acne is not a disqualifying condition for blood donation. Tattoo requires a 3-
month waiting period in most states. Needle stick injury requires a 12-month waiting period. Individuals who
lived in Great Britain during the mad cow disease outbreak (1980-1996) may be deferred indefinitely.
Question 3
A unit of blood was transferred to a transfusing facility. The unit of blood should be returned to the collecting
facility if the temperature is:
A) 6°C
B) 8°C
C) 10°C
D) 12°C
Correct Answer: D
Rationale: Blood units must be stored at 1-6°C. If the temperature exceeds 10°C, the unit is considered
compromised. A temperature of 12°C exceeds acceptable limits and the unit should be returned.
Question 4
A DAT profile gave the following results: Polyspecific: +, IgG: +, C3b: 0. These results are MOST consistent
with:
A) Warm autoimmune hemolytic anemia
B) Cold autoimmune hemolytic anemia
C) Complement deficiency
D) Immunosuppressant
Correct Answer: A
Rationale: A positive DAT with IgG only is characteristic of warm autoimmune hemolytic anemia. Cold
autoimmune hemolytic anemia typically shows C3 positivity. Complement deficiency would yield negative
DAT results.
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
Question 5
A pregnant woman with active syphilis has an RPR of 1:32 and is being treated with penicillin. Her newborn's
cord blood RPR is 1:2. What is the MOST appropriate interpretation?
A) The baby has congenital syphilis
B) The baby does not have syphilis; this titer represents passive antibody transfer from the mother
C) The baby does not have syphilis; this titer represents a biological false positive
D) No definitive conclusion can be made without further testing
Correct Answer: D
Rationale: A low titer of 1:2 in cord blood could represent passive transfer of maternal antibodies rather than
congenital infection. Further testing (infant serum RPR or IgM testing) is needed to distinguish between
passive antibody transfer and true congenital infection.
Question 6
Which ABO phenotype is considered the "universal donor" for red blood cell transfusions?
A) A positive
B) B positive
C) AB positive
D) O negative
Correct Answer: D
Rationale: O negative red blood cells lack A, B, and Rh antigens, making them compatible with all ABO and
Rh types. This is why O negative blood is used in emergencies when the patient's blood type is unknown.
Question 7
Which of the following is the MOST common cause of transfusion-associated circulatory overload (TACO)?
, MLT ASCP (MEDICAL LABORATORY TECHNICIAN) ACTUAL EXAM 2026/2027 |
COMPLETE 100 VERIFIED QUESTIONS | MULTIPLE-CHOICE | DETAILED
RATIONALES | COMPREHENSIVE REVIEW | NGN-STYLE – GRADED A+
A) Transfusion of ABO-incompatible blood
B) Rapid or excessive transfusion volume in a susceptible patient
C) Bacterial contamination of blood products
D) Allergic reaction to plasma proteins
Correct Answer: B
Rationale: TACO is caused by rapid or excessive transfusion volume leading to fluid overload, particularly in
patients with compromised cardiac or renal function. The key is to transfuse at an appropriate rate and
monitor for signs of volume overload.
Question 8
What is the primary antibody screen used to detect?
A) ABO antibodies
B) Rh antibodies
C) Unexpected red cell antibodies
D) Platelet antibodies
Correct Answer: C
Rationale: The antibody screen detects unexpected (atypical) red blood cell antibodies in patient serum, which
could cause hemolytic transfusion reactions. ABO and Rh antibodies are expected based on the patient's blood
type.
Question 9
A patient has a positive antibody screen. The antibody is identified as anti-Kell. Which of the following is the
MOST appropriate action?
A) Issue K-positive blood
