Hi

Chapter 1.2: Sterilization and Disinfection - Questions

1. Sterilization accuracy is assessed by using:

a. Clostridium perfringens
b. Geobacillus stereothermophilus
c. Staphylococcus aureus
d. Clostridium botulinum
e. Bacillus subtilis subsp. Niger

2. Best method of sera sterilization is:

a. Filtration
b. Autoclaving
c. Radiation
d. Heating

3. Which of the following is used to test the efficiency of sterilization in an autoclave?

a. Clostridium tetani
b. Bacillus stearothermophilus
c. Bacillus pumilus
d. Bacillus cereus

4. Spore of which bacteria is used as sterilization control of plasma sterilization?

a. Bacillus subtilis
b. Bacillus pumilus
c. Clostridium tetani
d. Bacillus stearothermophilus

5. Condition required for autoclave is:

a. 121°C for 20 min
b. 121°C for 15 min
c. 100°C for 60 min
d. 100°C for 90 min

6. Which of the following is most resistant to sterilization?

a. Cysts
b. Prions
c. Spores
d. Viruses

7. Choose the correct order for resistance to sterilization:

a. Prions > Bacterial spores > Bacteria
b. Bacterial spores > Bacteria > Prions
c. Bacteria > Prions > Bacterial spores
d. Bacterial spores > Prions > Bacteria

8. Low-level disinfectant is:

a. Benzalkonium chloride
b. Isopropyl alcohol
c. Glutaraldehyde
d. Hydrogen peroxide

9. Heart-lung machine is best sterilized by:

a. Cidex
b. Ethylene oxide
c. Isopropyl alcohol
d. Formaldehyde

10. Upper GI endoscope in a TB suspect should be sterilized by:

a. 2% Glutaraldehyde
b. Hot air oven
c. Autoclave