MCQs Test on Sterilization.

Sterilization MCQs

Practice Test

 

1. ____ shows the time required for killing 90% of microbes present in a food sample.
   1.   D Value
   2.   F value
   3.   Z value
   4.   M value
2. Which of the following is an efficient fpore size for bacterial filtration?
   1.   0.45 mm
   2.   0.22 mm
   3.   0.22 μm
   4.   0.54μm
3. Zinc oxide powder is usually sterilized by,
   1.   Autoclave
   2.   Pasteurization
   3.   Filtration
   4.   Hot air oven
4. The microorganism used as biological indicator for ionizing radiation is -------
   1.   Clostridium sporogenes
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
5. The microorganism used as biological indicator for nonionizing radiation is -------
   1.   Clostridium sporogenes
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
6. The microorganism used as biological indicator for gaseous sterilization is -------
   1.   Clostridium sporogenes
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
7. The microorganism used as biological indicator for autoclaving is -------
   1.   Clostridium sporogenes
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
8. The microorganism used as biological indicator for hot air oven is -------
   1.   Clostridium sporogenes
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
9. The microorganism used as biological indicator for sterilization by filtration is -------
   1.   Pseudomonas diminuta
   2.   Bacillus subtilis
   3.   Bacillus pumilus
   4.   Bacillus stearothermophilus
10. Red heat is used for sterilization of,
    1.   Surgical dressings.
    2.   Disposable syringe
    3.   Vaccines
    4.   Nichrome wire loop
11. Destruction of microbes on living tissues is----
    1.   Antisepsis
    2.   Sanitization
    3.   Disinfection
    4.   All of the above
12. Exposure of material to steam of 100°C for 20 minutes for three consecutive days is -----
    1.   Autoclaving
    2.   Tyndallization
    3.   Pasteurization
    4.   None of the above.
13. In the holder method, milk is sterilized by pasteurization method at -----
    1.   65°C for 30 mins
    2.   63°C for 30 mins
    3.   65 °C for 60 mins
    4.   63°C for 60 mins
14. Brown’s tube is a most commonly used indicator for,
    1.   Sterilization by filtration
    2.   Sterilization by radiation
    3.   Chemical sterilization
    4.   Sterilization by heat
15. Royce Sachet is an indicator for,
    1.   Sterilization by filtration
    2.   Sterilization by radiation
    3.   Chemical sterilization
    4.   Gaseous sterilization
16. Chemical dosimeter is an indicator for,
    1.   Sterilization by filtration
    2.   Sterilization by radiation
    3.   Chemical sterilization
    4.   Sterilization by heat
17. Antibiotic solutions are sterilized by,
    1.   Sterilization by filtration
    2.   Pasteurization
    3.   Chemical sterilization.
    4.   Sterilization by heat
18. Disposable syringes are sterilized by,
    1.   Sterilization by filtration
    2.   Sterilization by radiation
    3.   Chemical sterilization
    4.   Pasteurization
19. Z-value is defined as,
    1.   the number of degrees (Celsius or Fahrenheit) required to change a D-value by ten folds.
    2.   the number of degrees (Celsius or Fahrenheit) required to change a F-value by ten folds.
    3.   the number of degrees (Celsius or Fahrenheit) required to change a D-value by two folds.
    4.   the number of degrees (Celsius or Fahrenheit) required to change a F-value by two folds.
20. F value for a process is,
    1.   the number of minutes required to kill a known population of microorganisms in a given food sample under specified conditions.
    2.   the number of minutes required to kill a 90% population of microorganisms in a given food under specified conditions.
    3.   the number of minutes required to kill a 99% population of microorganisms in a given food under specified conditions.
    4.   the number of degrees (Celsius or Fahrenheit) required to change a D-value by ten folds.