1. Temperature and duration in Flash method of Pasteurization is
✅ Correct answer is C. 71.6°C for 15 seconds (HTST pasteurization).
2. Concentration range for ethylene oxide sterilization is
✅ Correct answer is B. 800–1200 mg/L.
3. Browne’s tubes are indicators for
✅ Correct answer is A. Heat sterilization.
4. Royce sachet is indicator for
✅ Correct answer is D. Ethylene oxide.
5. Recommended time and pressure for autoclave sterilization of media
✅ Correct answer is C. 15 minutes at 15 lbs pressure (121°C).
6. Sterilization potency is highest in
✅ Correct answer is D. Autoclaving.
7. Formalin and KMnO₄ required for 1000 cu ft area
✅ Correct answer is A. 280 ml formalin + 150 g KMnO₄.
8. Suitable pore size for bacterial filtration
✅ Correct answer is C. 0.22 μm.
9. Time required to destroy 90% organisms is called
✅ Correct answer is A. D value.
10. Biological indicator for ionizing radiation
✅ Correct answer is B. Bacillus pumilus.
11. Suitable method of sterilization of powders
✅ Correct answer is B. Hot air oven.
12. Temperature change to produce 10-fold change in D value
✅ Correct answer is B. Z value.
13. Mechanism of action of ethylene oxide
✅ Correct answer is C. Denaturing of proteins.
14. Best method of sterilizing disposable syringes
✅ Correct answer is D. Gamma radiation.
15. Temperature and duration in Holder’s method of pasteurization
✅ Correct answer is A. 62.9°C for 30 minutes.
16. Pressure of 15 psi in autoclave equals
✅ Correct answer is C. 121°C.
17. Bubble point pressure test validates
✅ Correct answer is D. Filtration.
18. Suitable method for sterilization of syringes
✅ Correct answer is D. Radiation.
19. Sterilization of catgut and gloves is done by
✅ Correct answer is B. Gamma radiation.
20. Recommended time and temperature for hot air oven sterilization
✅ Correct answer is A. 160°C for 120 minutes.