Medical Laboratory Technology (MLT)
Practice Exam
A clean 1.0 L volumetric flask is filled to the calibration line with distilled water. To the
water in the flask 9.0g of NaCL is added and mixed by inversion. This method of
preparation will result in a solution whose concentration is:
a. 0.9g/dL
b. 9.0g/dL
c. Slightly less than 0.9g/dL
d. Slightly greater than 0.9g/dL - ------------ANS: c.slightly less than 0.9g/dL
A clinical laboratory technician consistently prepares peripheral blood smears that
are very thin and cover the majority of the slide. What is the appropriate corrective
action?
a. Use a larger drop of blood
b. Alcohol was the slide first
c. Increase the spreading speed
d. Increase the angle of the spreading slide - ------------ANS: d. Increase the angle of
the spreading slide
A clinical laboratory technician is given an unknown sample to document proficiency
in the performance of glucose testing. The clinical laboratory technician obtains a
result of 195mg/dL; the control values are within the acceptable range. What should
the clinical laboratory technician do?
a. Report the result as 195mg/dL
b. Repeat the test to confirm the result
c. Ask another clinical lab technician to perform the test to confirm the result
d. Dilute the sample and repeat the test - ------------ANS: a.Report the result as 195
mg/dL
A clinical laboratory technician wishes to examine an unstained, wet preparation of
cells or organism prior to dehydration. Which of the following types of microscopes
would be best to use in this scenario?
a. Phase Contrast
b. Fluorescence
c. Brightfield
d. Electron - ------------ANS: a. Phase Contrast
A control has a mean of 2.8 with a standard deviation of 0.3 of the values obtained,
68% should fall within a range of:
a. 2.2 - 3.1
, b. 2.5 - 3.4
c. 2.2 - 3.4
d. 2.5 - 3.1 - ------------ANS: d.2.5 - 3.1
A DAT profile gave the following results:
{Polspecific: +} {IgG:+} {C3b: 0}
These results are MOST consistent with:
a. Warm autoimmune hemolytic anemia
b. Cold autoimmune hemolytic anemia
c. Complement deficiency
d. Immunosuppressant - ------------ANS: a.Warm autoimmune hemolytic anemia
A new method for measuring blood urea nitrogen (BUN) is being considered by the
chemistry dept. The following data are obtained for within-run precision studies after
running the abnormal level control 10 times using the new method: 45, 48, 52, 53,
57, 55, 44, 45, 46, 50. The reference range for the control is 43 to 57 mg/dL. The
manufacturer claims the C.V for the new method is 5.0%. what is the calculated C.V
and is this precision acceptable?
a. Calculated C.V. at 4.6% is less than the manufacture's; precision is acceptable
b. Calculated C.V. at 9.3% is greater than the manufacture's; precision is
unacceptable
c. Calculated C.V. at 9.3% is less that the two times the manufacture's; precision is
acceptable
d. Calculated C.V. at 10.8% is greater than the manufacturer's; precision is
unacceptable - ------------ANS: b. Calculated C.V. at 9.3% is greater than the
manufacture's; precision is unacceptable
A patient's peripheral blood smear examination reveals normochromic erythrocytes
and the patient's hemoglobin is 8.2 g/dL. Which hematocrit value correlates with
these data?
a. 0.15
b. 0.25
c. 0.30
d. 0.33 - ------------ANS: b.0.25
A pregnant woman who has active syphillis and a RPR of 1:32 is being treated with
penicillin. She gives birth to a baby boy. When the cord blood from the baby is
tested, the RPR is 1:2. Based on the above data, the most likely interpretation is:
a. The baby has congenital syphillis
b. The baby does not have syphillis. A titer this low represents passive acquisition of
the antibody from the mother
c. The baby does not have syphillis. A titer this low represents a biological false
positive
Practice Exam
A clean 1.0 L volumetric flask is filled to the calibration line with distilled water. To the
water in the flask 9.0g of NaCL is added and mixed by inversion. This method of
preparation will result in a solution whose concentration is:
a. 0.9g/dL
b. 9.0g/dL
c. Slightly less than 0.9g/dL
d. Slightly greater than 0.9g/dL - ------------ANS: c.slightly less than 0.9g/dL
A clinical laboratory technician consistently prepares peripheral blood smears that
are very thin and cover the majority of the slide. What is the appropriate corrective
action?
a. Use a larger drop of blood
b. Alcohol was the slide first
c. Increase the spreading speed
d. Increase the angle of the spreading slide - ------------ANS: d. Increase the angle of
the spreading slide
A clinical laboratory technician is given an unknown sample to document proficiency
in the performance of glucose testing. The clinical laboratory technician obtains a
result of 195mg/dL; the control values are within the acceptable range. What should
the clinical laboratory technician do?
a. Report the result as 195mg/dL
b. Repeat the test to confirm the result
c. Ask another clinical lab technician to perform the test to confirm the result
d. Dilute the sample and repeat the test - ------------ANS: a.Report the result as 195
mg/dL
A clinical laboratory technician wishes to examine an unstained, wet preparation of
cells or organism prior to dehydration. Which of the following types of microscopes
would be best to use in this scenario?
a. Phase Contrast
b. Fluorescence
c. Brightfield
d. Electron - ------------ANS: a. Phase Contrast
A control has a mean of 2.8 with a standard deviation of 0.3 of the values obtained,
68% should fall within a range of:
a. 2.2 - 3.1
, b. 2.5 - 3.4
c. 2.2 - 3.4
d. 2.5 - 3.1 - ------------ANS: d.2.5 - 3.1
A DAT profile gave the following results:
{Polspecific: +} {IgG:+} {C3b: 0}
These results are MOST consistent with:
a. Warm autoimmune hemolytic anemia
b. Cold autoimmune hemolytic anemia
c. Complement deficiency
d. Immunosuppressant - ------------ANS: a.Warm autoimmune hemolytic anemia
A new method for measuring blood urea nitrogen (BUN) is being considered by the
chemistry dept. The following data are obtained for within-run precision studies after
running the abnormal level control 10 times using the new method: 45, 48, 52, 53,
57, 55, 44, 45, 46, 50. The reference range for the control is 43 to 57 mg/dL. The
manufacturer claims the C.V for the new method is 5.0%. what is the calculated C.V
and is this precision acceptable?
a. Calculated C.V. at 4.6% is less than the manufacture's; precision is acceptable
b. Calculated C.V. at 9.3% is greater than the manufacture's; precision is
unacceptable
c. Calculated C.V. at 9.3% is less that the two times the manufacture's; precision is
acceptable
d. Calculated C.V. at 10.8% is greater than the manufacturer's; precision is
unacceptable - ------------ANS: b. Calculated C.V. at 9.3% is greater than the
manufacture's; precision is unacceptable
A patient's peripheral blood smear examination reveals normochromic erythrocytes
and the patient's hemoglobin is 8.2 g/dL. Which hematocrit value correlates with
these data?
a. 0.15
b. 0.25
c. 0.30
d. 0.33 - ------------ANS: b.0.25
A pregnant woman who has active syphillis and a RPR of 1:32 is being treated with
penicillin. She gives birth to a baby boy. When the cord blood from the baby is
tested, the RPR is 1:2. Based on the above data, the most likely interpretation is:
a. The baby has congenital syphillis
b. The baby does not have syphillis. A titer this low represents passive acquisition of
the antibody from the mother
c. The baby does not have syphillis. A titer this low represents a biological false
positive
