Choose the BEST answer:
1.
Quality Control Charts (QCC) are
useful in demonstrating:
a. average d. analytical trends
b. median e. all of the above
c.
accuracy
2.
The percentage of values of the
normal population INCLUDED within the acceptable range is:
a. 85.6 % d.
65.5 %
b. 95 % e.
NIL
c. 79.9 %
3.
The following may be used to
analyze quality control data, EXCEPT:
a. Levey-Jennings
plot d.
Westgard Rules
b. Shewhart Plot e.
NIL
c. trends and
shifts
4.
The extent to which
measurements agree to the true value of the quantity being measured is known
as:
a. precision d.
reliability
b. accuracy e.
NIL
c. acceptable
limits
5.
The repeatability of test
measurements is referred to as:
a. predictability c.
precision e. NIL
b. accuracy d.
reliability
6.
The middle value of a set of
numbers that are arranged according to their value is known as:
a. median c.
arithmetic mean e. NIL
b. coefficient of
variation d.
mode
7.
The +- 2 SD range excludes the
following percentage values, in a Gaussian distribution:
a. 5.5 % c.
12.7 % e. NIL
b. 31.3 % d. 12.7%
8. Compute
for the coefficient of variation when +- 1SD = +-9 mg/dL and the mean is 90
mg/dL:
a.
10.2 % c.
13.5 % e. NIL
b.
5.8 % d.
14.1 %
9.
When establishing a reference
range, it is most desirable to obtain
specimens from at least the following number of individuals:
a. 125 c.
100 e. NIL
b. 250 d.
10
10.
The following should be taken
into consideration when establishing a reference range, EXCEPT:
a. age d.
medical history
b. sex e.
NIL
c.
Sampling time
11.
When data fluctuation are due
to chance and results are seen to vary in either direction, the problem is
referred to as:
a.
systematic error e. NIL
b.
random error
c.
traditional error
d.
all of the above
12.
This process encompasses all
aspects of laboratory operation including patient ID, specimen collection,
assaying and recording:
a. quality control c.
quality assurance e. NIL
b. external
control d.
internal control
13. The following Westgard Rules
indicate a random error:
a. 1 (2S), 1 (3S), R (4S)
b. 10 X , 2 (2S), 1(3S)
c. 2 (2S), 1 (2S), 1 (3S)
d. R (4S), 2 (2S), 2 (1S)
e. NIL
14.
What is the importance of an
external quality assurance program to the laboratory?
a.
Provides a means to compare
tests performed by different sections within the same laboratory.
b.
Assessment of its performance in
comparison with other laboratories using the same methods
c.
Provides data confirmation with
previous tests on the same patient
d.
Provides reference intervals as
basis of tests
e.
NIL
15. An abrupt shift in the daily values of a Q.C chart is likely to be the
result of:
a.
Error in the quality control
chart
b.
Shifting of operating
technologist
c.
Calibrating the sample
aspiration probe of the machine
d.
Varying the wavelength during a
sample run
e.
Using new standards simultaneously
with the current standard kit
f.
NIL
16. Which of these are classified as random errors?
1.
Mispipetting
2.
Mislabeling of sample
3.
Improper mixture of sample and
reagent
4.
Sample instability
5.
Deterioration of reagent
A.
1 and 2 B. 3 and 4 C. 1,2 and 3 D.
all of the above E. NIL
17.
Which of these is a good practice
in the use of laboratory coats?
a.
Never leave laboratory coat in the workplace
b.
Use secondary laboratory coat
when performing phlebotomy outside the laboratory
c.
Use laboratory coat only when
inside the laboratory
d.
Laboratory coat must be cleaned
at home before coming to the workplace
e.
NIL
18. The
following are included in patient identification, EXCEPT:
a.
Introduce yourself before anything else.
b.
Confirm identity of patient by stating his/her name.
c.
Check for the age, sex and requested tests.
d.
Explain the procedure briefly
e.
NIL
19. These
are considered as random errors, EXCEPT:
a.
mispipetting
b.
mislabeling
c. improper
mixing
d.
prolonged incubation
e.
NIL
20. The
following are considered as systematic errors, EXCEPT:
a. expired reagents
b. uncalibrated apparatus
c. fluctuating voltage
d. inappropriate temperature
e. NIL
CHOICES
FOR NUMBERS 21 to 24
ARRANGE
CHRONOLOGICALLY THE FOLLOWING STEPS IN QUALITY CONTROL CHART PREPARATION:
A.
Solve for SD - #22
B.
Solve for mean - #21
C.
Plot SDs - #24
D.
Determine +- 1, 2 and 3 SDs - #23
25. For
you to be able to interpret a quality control chart, you must have this number
of data:
A. 20 control values C. 20 standard values
B. 10 control values D.10 standard values
E. NIL
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