6 SYSTEMS OF MEASUREMENT, LABORATORY EQUIPMENT, AND REAGENTS

Question 1

The metric system unit of volume is a:
a. Meter
b. Gram
c. Liter
d. Micron

Answer 1

c. Liter

Question 2

The metric system unit of length is a:
a. Meter
b. Gram
c. Liter
d. Pound

Answer 2

a. Meter

Question 3

The metric unit of mass is a:
a. Meter
b. Gram
c. Liter
d. Angstrom

Answer 3

b. Gram

Question 4

Convert: 20°C=___ °F
a. 25
b. 53
c. 68
d. 86

Answer 4

c. 68

Question 5

Convert: 75°F=___°C
a. 15.5
b. 21.0
c. 23.8
d. 32.6

Answer 5

c. 23.8

Question 6

The prefix milli represents:
a. 10^−2
b. 10^−3
c. 10^−6
d. 10^−9

Answer 6

b. 10^−3

Question 7

The prefix micro represents:
a. 10^−2
b. 10^−3
c. 10^−6
d. 10^−9

Answer 7

c. 10^−6

Question 8

The primary use of a 1-mL volumetric pipette is to:
a. Prepare a reagent of specific total volume
b. Measure an unknown serum sample
c. Add a reagent to a reaction tube
d. Measure an approximate amount of control specimen

Answer 8

b. Measure an unknown serum sample

Question 9

The primary use of a 10-mL graduated pipette is to:
a. Prepare a reagent of specific total volume
b. Measure an unknown serum sample
c. Add a reagent to a reaction tube
d. Measure an approximate amount of control specimen

Answer 9

c. Add a reagent to a reaction tube

Question 10

The primary use of a 100-mL volumetric flask is to:
a. Prepare a reagent of specific total volume
b. Measure an unknown serum sample
c. Add a reagent to a reaction tube
d. Measure an approximate amount of control specimen

Answer 10

a. Prepare a reagent of specific total volume

Question 11

An etched ring on a to-deliver (TD) pipette indicates:
a. A small amount of fluid will remain in tip of pipette, and it is left to remain in the tip.
b. The drop remaining in the tip must be blown out.
c. Either a or b.
d. No significance.

Answer 11

b. The drop remaining in the tip must be blown out.

Question 12

A cytocentrifuge is used to spread:
a. Liquid specimens evenly over a slide
b. Monolayers of cells
c. A large volume of specimen
d. Both a and b

Answer 12

d. Both a and b

Question 13

The purest type of reagent water is:
a. Type I
b. Type II
c. Type III
d. All are equal

Answer 13

a. Type I

Question 14

Water from which minerals have been removed and that meets the specifications for type II and type III water is called:
a. Distilled water
b. Deionized water
c. Reagent-grade water
d. Charcoal-activated water

Answer 14

a. Distilled water

Question 15

Grades of chemicals include all the following grades except:
a. Analytical reagent
b. Chemically pure
c. Commercial grade
d. Industrial grade

Answer 15

d. Industrial grade

Question 16

Reference standards are chemicals whose purity has been ensured by the:
a. National Institute of Standards and Technology
b. Centers for Disease Control and Prevention
c. Occupational Safety and Health Administration
d. State licensing agencies

Answer 16

a. National Institute of Standards and Technology

Question 17

A solute is:
a. The substance dissolved in the solution
b. The substance that does the dissolving
c. Always water
d. Both b and c

Answer 17

a. The substance dissolved in the solution

Question 18

A label for a reagent should bear:
a. Name and concentration of regent
b. Date prepared and expiration date
c. Initials of preparer
d. All the above

Answer 18

d. All the above

Question 19

You need to complete a chemistry procedure that involves diluting 1.5mL of serum specimens to a 1:10 solution before performing testing. Which pipette is best suited for this task?
a. Volumetric
b. Serologic
c. Micropipette
d. Any of the above

Answer 19

c. Micropipette

Question 20

You need to reconstitute quality control samples by adding 5mL of deionized water to lyophilized material. Which pipette is best suited for this task?
a. Volumetric
b. Serologic
c. Micropipette
d. Any of the above

Answer 20

a. Volumetric

Question 21

You need to perform some testing in the serology department. Which pipette is suitable for use in this department, but not for other tasks (such as pipetting small amounts of blood or specimen, measuring standard solution)?
a. Volumetric
b. Serologic
c. Micropipette
d. Erlenmeyer

Answer 21

c. Micropipette