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Multiple Choice Quiz
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1
A graph derived from the sampling in hematology instruments showing frequency distribution of cells is called:
A)a printout
B)a histogram
C)cell indices
D)cell counts
2
In the electrical impedance cell counter, the size of the electrical pulse is proportional to the:
A)weight of the cell
B)size of the cell
C)size of the aperture used for counting the cells
D)volume of electrical fluid forced through the aperture
3
The white blood cell dilution in the analyzers is mixed with lysing reagent that:
A)ruptures the white cells so the nuclei can be analyzed
B)ruptures the red blood cells so the white blood cells can be counted
C)further dilutes the solutions for higher cell counts
D)does nothing more than give color to the dilution
4
Hemoglobin measurements made with an electrical impedance type instrument use:
A)the electrical impedance method
B)the optical absorbance method
C)counting red cells through the aperture
D)sorting the darker red cells in the dilution chamber
5
Which of the following layers of blood is less dense and therefore on the top after centrifugation in the QBC instrument?
A)Red blood cells
B)Plasma
C)Buffy coat
D)White blood cells
6
A hematology calibrator is used to:
A)set the electronics of the instrument
B)check the stability of the instrument settings
C)check the reagents
D)check the normal ranges of the patient tests
7
A histogram is a graph that can be generated and printed by hematology analyzers and that shows the:
A)normal ranges for hemoglobin
B)calibrator standard for most hematology tests
C)size and frequency distributions of blood cell populations
D)voltage used in the electrode
8
Split-specimen testing is used with automated hematology instruments to test:
A)accuracy of results
B)cell indices
C)cell differentials
D)fluorescence
9
The expected value and allowable deviation for each level of control for a given instrument are supplied by the:
A)textbook
B)reference laboratory
C)manufacturer
D)CLIA
10
The automated instrument that centrifuges nondiluted blood samples is also known as:
A)electrical impedance instrument
B)quantitative buffy coat instrument
C)colorimetric instrument
D)laser technical methodology





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