Principles of basic techniques and laboratory safety

Question 1

1. One aspect of Standard Precautions, and an Occupational
   Safety and Health Administration (OSHA) requirement,
   involves the provision of personal protective equipment
   (PPE) to laboratory employees. PPE includes (but is not
   limited to) which of the following?

a. Gloves only
b. Gloves and a lab coat only
c. Gloves, eye protection, and a lab coat
d. Gloves, eye protection, a lab coat, and special footwear

Answer 1

c. Gloves, eye protection, and a lab coat

Question 2

2. Which of the following uses for analytical weights is
   false?

a. Analytical weights are used for verifying performance
of single pan balances.
b. Class S weights are used for calibrating balances.
c. Balances must be calibrated each day of use for accurate analytical work.
d. Weights can be made of materials such as brass and
platinum.

Answer 2

c. Balances must be calibrated each day of use for accurate analytical work.

Question 3

3. The organization that develops and implements standards and guidelines for laboratories in addition to setting certain safety guidelines is:
   a. CAP.
   b. CLSI.
   c. EPA.
   d. DOT.

Answer 3

b. CLSI

Question 4

4. The process by which the concentration or activity of a
   given solution is decreased by the addition of solvent is
   referred to as:

a. solution.
b. evaporation.
c. lyophilization.
d. dilution.

Answer 4

d. dilution

Question 5

5. The formula used to determine the molarity of a solution
   is which of the following?

a. C1V1 = C2V2
b. number of moles of solute/number of liters of solution
c. mg/L divided by mg molecular mass
d. mass in grams/gram molecular weight in grams

Answer 5

b. number of moles of solute/number of liters of solution

Question 6

6. Which type of highly purified material needs to minimally be 99.98% pure?

a. Certified Reference Material
b. Standard Reference Material
c. Secondary Reference Material
d. Primary Reference Material

Answer 6

d. Primary Reference Material

Question 7

7. Which of the following statements regarding water purification is incorrect?

a. Water treated by distillation alone does not meet the
specific conductivity requirement for Clinical Laboratory Reagent Water (CLRW).
b. Reverse osmosis forces water through a semipermeable membrane.
c. Only one purification process is necessary for obtaining CLRW.
d. UV oxidation can eliminate many bacteria and cleave
ionizing organics

Answer 7

c. Only one purification process is necessary for obtaining CLRW.

Question 8

8. The two chemical grades that are suitable for use in a clinical chemistry laboratory are:

a. technical and analytical reagent grades.
b. ultrapure and technical grades.
c. technical and National Formulary grades.
d. ultrapure and analytical reagent grades.

Answer 8

d. ultrapure and analytical reagent grades.

Question 9

9. Relative centrifugal force or field (RCF) is measured in
   which of the following units?

a. Gravities (g)
b. Centimeters (cm)
c. rpm
d. Forces (f)

Answer 9

a. Gravities (g)

Question 10

10. Protection of laboratory workers against potential exposure to bloodborne pathogens and assurance that medical waste is handled safely are OSHA requirements that are part of which of the following plans?

a. Chemical hygiene plan
b. Exposure control plan
c. Tuberculosis control plan
d. Fire safety plan

Answer 10

b. Exposure control plan