Basic MCQs of Sterilization

Q1. Which of the following is not a physical agent of sterilization ?

A. Sunlight B. Radiation C. Dyes D. Drying

✅ Answer: C. Dyes

Q2. Bactericidal agents

A. Kill bacteria B. Prevent bacterial multiplication C. Both a and b D. None of the above

✅ Answer: A. Kill bacteria

Q3. Which of the following is not a method of dry heat sterilization?

A. Flaming B. Hot air oven C. Incineration D. Pasteurisation

✅ Answer: D. Pasteurization

Q4. Microbiological test of dry heat efficiency is confirmed by non toxigenic strain of

A. Bacillus megatherium B. E.Coli C. Clostridium tetani D. C.jejuni

✅ Answer: C. Clostridium tetani

Q5. Spores of Bacillus Stearothermocolus are used for determining efficiency of

A. Filtration B. Hot air oven C. Moist Heat sterilization D. Flaming

✅ Answer: C. Moist Heat sterilization

Q6. Which of the following is not used for filtration in sterilization?

A. Candle filter B. Membrane filter C. Asbestos filter D. Glutaraldehyde

✅ Answer: D. Glutaraldehyde

Q7. Which of the following is not a chemical agent for sterilization ?

A. Ethyl alcohol B. Methyl alcohol C. Formaldehyde D. Uranium

✅ Answer: D. Uranium

Q8. Ethylene oxide is used for sterilizing all accept

A. Heart lung machine B. Sutures C. Rooms D. Books

✅ Answer: C. Rooms

Q9. Most suitable for size for bacterial filtration in a membrane fielder is_____

A. 0.22 mm B. 0.22 µm C. 0.45 nm D. 0.32 µm

✅ Answer: B. 0.22 µm

Q10. Best method of sterilizing disposable syringes is ____

A. Autoclave B. Boiling C. Carbon dioxide D. Gamma radiation

✅ Answer: D. Gamma radiation