(1) Open
(2) Closed
(3) Isolated
(4) Semi-closed
Answer: 1
2. Which of the following time is not included in continuous sterilization?
(1) Heating time
(2) Cooling time
(3) Holding time
(4) Sterilization time
Answer: 4
3. What is the correct sequence of steps involved in continuous sterilization?
(1)Heating, holding, and cooling.
(2) Heating, cooling, and holding.
(3) Holding, heating, and cooling.
(4) Cooling, holding, and heating
Answer: 1
4. Which of the following is a type of continuous sterilizer?
(1) Steam Injector
(2) Inertial Impaction
(3) Electrostatic attraction
(4) Interception
Answer: 1
5. The holding time at 135°C will be _________
(1) 2.44 minutes
(2) 51.9 seconds
(3) 18.9 seconds
(4) 2.7 seconds
Answer: 2
6. What are the bases for designing a continuous sterilizer?
(1) a heating section
(2) a holding section,
(3) a cooling section
(4) All of the above
Answer: 4
7. The sterilization in double spiral heat exchanger is done through ___________
(1) Countercurrent mechanism
(2) Counter mechanism
(3) Symporter mechanism
(4) Antiporter mechanism
Answer: 1
8. Which of the following is an advantage of continuous sterilization over batch sterilization?
(1) Solid matter can be used in media
(2) Reduction of fermenter corrosion
(3) Lower risk of contamination
(4) Easier control
Answer: 2
9. Which technique is commonly used for sterilization of air continuously supplied in fermenters?
(1) Filtration
(2) Autoclave
(3) Chemical sterilization
(4) Radiation
Answer: 1
10. What is the holding time in sterilization?
(1) The holding time is the time the whole load must be held at sterilizing temperature.
(2) The holding time is the heating time the whole load must be held at sterilizing temperature.
(3) The holding time is the heating time the whole load must be held at Cooling.
(4) All of the above
Answer: 1
11. Which of the following is the main disadvantage of a direct plate exchanger?
(1) Foaming occurs
(2) High capital cost
(3) If the media contains suspended solids, the plate may get blocked
(4) High maintenance
Answer : 3
12. Which of the following is not a property of Plate type heat exchangers?
(1) Even though the heat exchanger has a low hydraulic diameter, it can be readily and easily cleaned
(2) Leakage is never a concern in these heat exchangers
(3) It provides a very large surface area for heat transfer
(4) The net weight required is always less than its equivalent Shell and tube type heat exchanger
Answer: 2
