Tuesday, January 26, 2010

Laboratory Instrumentation Quiz

TEST I – Multiple Choice.

Choices for nos 1-5:
a. Pre-analytical
b. Analytical
c. Post-analytical

1. Exposed reagent strips
2. Outdated set of protocols
3. Illegible request forum
4. QNS
5. COC not properly followed

6. The resolving power of a microscope refers to its ability to
a. Refract light
b. Clearly show detail
c. Produce an enlarged image
d. Increase an object’s apparent size
e. All of these

7. What is the standard length of the draw tube of a microscope?
a. 10 cm
b. 160 mm
c. 1.4 dm
d. 3.5 inches
e. None of the above

8. If the image remains visible after the exchange of objectives, the lenses are said to be
a. Parfocal
b. Partentive
c. Parcentered
d. A & C
e. None of the above

9. What substances are best visualized using polarized light?
a. Birefringent substances
b. Doubly refractile substances
c. Substances that can refract light in two directions
d. A & C
e. A, B & C

10. Which is not true about the transmission electron microscope?
a. It is used to study viruses
b. It shows a detailed structure of larger microbes
c. Ultrathin sections of the specimen must be prepared
d. It provides a better view of the surface of even small microorganisms
e. Makes use of electron beams to produce contrast

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