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NYC Clinical Laboratory Scientist (Medical Technologist) exam
COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Summarized Exam Coverage – NYC Clinical Laboratory Scientist (Medical Technologist)
The exam tests clinical chemistry, hematology, hemostasis, immunohematology (blood bank),
microbiology, immunology/serology, urinalysis, laboratory operations (quality control, safety,
regulations), and NYS-specific requirements (infection control, mandatory reporting, licensure
standards). Questions integrate multiple disciplines in realistic clinical scenarios .
1. A coagulopathy specimen arrives at the lab in a tube filled completely with no air bubble. Which
anticoagulant must be present for accurate results?
A) EDTA
B) Sodium citrate
C) Lithium heparin
D) Sodium fluoride
Answer: B – Sodium citrate binds calcium reversibly and is required for coagulation testing; improper fill
ratio alters results .
2. During a routine CBC, the analyzer flags a platelet clumping warning. What is the most appropriate
next step?
A) Report the platelet count as is
, Page 2 of 125
B) Perform a manual platelet estimate from the peripheral smear
C) Add a platelet aggregating agent
D) Dilute the sample and rerun
Answer: B – Platelet clumping causes falsely low automated counts; manual smear estimate or redraw
in sodium citrate tube is needed.
3. A patient presents with fatigue and pallor; CBC shows microcytic, hypochromic RBC indices. Which
laboratory finding would best support iron deficiency rather than thalassemia trait?
A) Elevated ferritin
B) Low serum iron with elevated total iron binding capacity (TIBC)
C) Normal RDW
D) Elevated hemoglobin A2
Answer: B – Iron deficiency shows low iron, high TIBC, and low ferritin; thalassemia trait typically has
normal or elevated iron studies .
4. A new batch of coagulase reagent fails to clot positive control Staphylococcus aureus. What is the
most likely cause?
A) Reagent too old
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B) The control organism is actually S. epidermidis
C) EDTA contamination
D) Incubation temperature too high
Answer: B – Coagulase test differentiates S. aureus (positive) from coagulase-negative staphylococci; if
control fails, reagent may be fine but organism misidentified.
5. After centrifuging a serum separator tube (SST), the serum appears pink-red. Which preanalytical
error most likely occurred?
A) Patient was not fasting
B) Hemolysis during collection or handling
C) Lipemia from high triglycerides
D) Prolonged tourniquet application
Answer: B – Pink-red serum indicates hemoglobin release from RBC destruction, which interferes with
many chemistry assays .
6. Urine dipstick is strongly positive for blood but no RBCs are seen on microscopic exam. Which
condition should you suspect?
A) Menstrual contamination
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B) Myoglobinuria from rhabdomyolysis
C) Urinary tract infection
D) Contamination with bleach
Answer: B – Myoglobin (from muscle breakdown) reacts with the blood pad but does not appear as
intact RBCs microscopically.
7. A patient’s blood type is A positive. Which unexpected antibody would cause agglutination when
crossmatched with A positive donor cells?
A) Anti-A
B) Anti-B
C) Anti-D
D) Anti-K (Kell)
Answer: D – Anti-K is an unexpected alloantibody; Anti-A and Anti-B are expected and not present in
type A.
8. Which test result would you expect in a patient with Dilated cardiomyopathy (DCM) and chronic heart
failure on warfarin therapy?
A) Prolonged PT and INR
NYC Clinical Laboratory Scientist (Medical Technologist) exam
COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Summarized Exam Coverage – NYC Clinical Laboratory Scientist (Medical Technologist)
The exam tests clinical chemistry, hematology, hemostasis, immunohematology (blood bank),
microbiology, immunology/serology, urinalysis, laboratory operations (quality control, safety,
regulations), and NYS-specific requirements (infection control, mandatory reporting, licensure
standards). Questions integrate multiple disciplines in realistic clinical scenarios .
1. A coagulopathy specimen arrives at the lab in a tube filled completely with no air bubble. Which
anticoagulant must be present for accurate results?
A) EDTA
B) Sodium citrate
C) Lithium heparin
D) Sodium fluoride
Answer: B – Sodium citrate binds calcium reversibly and is required for coagulation testing; improper fill
ratio alters results .
2. During a routine CBC, the analyzer flags a platelet clumping warning. What is the most appropriate
next step?
A) Report the platelet count as is
, Page 2 of 125
B) Perform a manual platelet estimate from the peripheral smear
C) Add a platelet aggregating agent
D) Dilute the sample and rerun
Answer: B – Platelet clumping causes falsely low automated counts; manual smear estimate or redraw
in sodium citrate tube is needed.
3. A patient presents with fatigue and pallor; CBC shows microcytic, hypochromic RBC indices. Which
laboratory finding would best support iron deficiency rather than thalassemia trait?
A) Elevated ferritin
B) Low serum iron with elevated total iron binding capacity (TIBC)
C) Normal RDW
D) Elevated hemoglobin A2
Answer: B – Iron deficiency shows low iron, high TIBC, and low ferritin; thalassemia trait typically has
normal or elevated iron studies .
4. A new batch of coagulase reagent fails to clot positive control Staphylococcus aureus. What is the
most likely cause?
A) Reagent too old
, Page 3 of 125
B) The control organism is actually S. epidermidis
C) EDTA contamination
D) Incubation temperature too high
Answer: B – Coagulase test differentiates S. aureus (positive) from coagulase-negative staphylococci; if
control fails, reagent may be fine but organism misidentified.
5. After centrifuging a serum separator tube (SST), the serum appears pink-red. Which preanalytical
error most likely occurred?
A) Patient was not fasting
B) Hemolysis during collection or handling
C) Lipemia from high triglycerides
D) Prolonged tourniquet application
Answer: B – Pink-red serum indicates hemoglobin release from RBC destruction, which interferes with
many chemistry assays .
6. Urine dipstick is strongly positive for blood but no RBCs are seen on microscopic exam. Which
condition should you suspect?
A) Menstrual contamination
, Page 4 of 125
B) Myoglobinuria from rhabdomyolysis
C) Urinary tract infection
D) Contamination with bleach
Answer: B – Myoglobin (from muscle breakdown) reacts with the blood pad but does not appear as
intact RBCs microscopically.
7. A patient’s blood type is A positive. Which unexpected antibody would cause agglutination when
crossmatched with A positive donor cells?
A) Anti-A
B) Anti-B
C) Anti-D
D) Anti-K (Kell)
Answer: D – Anti-K is an unexpected alloantibody; Anti-A and Anti-B are expected and not present in
type A.
8. Which test result would you expect in a patient with Dilated cardiomyopathy (DCM) and chronic heart
failure on warfarin therapy?
A) Prolonged PT and INR
