FOOD TECHNOLOGY (27/08/2021)

Q1. In Flame Sterilization, Cans Are Heated To A Temperature Of About __________.

A. 1200-1400०C
B. 120-140०C
C. 121.1-135०C
D. 62-72०C

ANSWER: A. 1200 – 1400०C

  • Explanation: Flame Sterilization Is A Method Of Commercially Sterilizing Canned Foods That Involve० Heating The Cans In Direct Contact With A Burner Flame While Rotating Quickly To Create Convection. It Is Best For Liquids And Particle Items That Are Packed In Brine, Syrup, Or Juice. Cans Are Heated To A Temperature Of Roughly 1200-1400० C During Flame Sterilization.


Q2. Which One Of The Following Affects The Product Temperature In The Hold Tube?

A. Condensate Drip
B. Draft Of Cold Air
C. Addition Of Heat
D. All Of The Above

ANSWER- D. All Of The Above

  • Explanation – Holding Tubes Provide A Preset Capacity Of Tubing To “Hold” A Product At A Specific Flow Rate For A Predetermined Amount Of Time. This Is Essential For Operations That Require A Dwell Time At A Specific Temperature, Such As Pasteurization, Sterilization, Thermal Deactivation, Or Tempering. The Condensate Drip, A Draught Of Cold Air, And The Heat Input All Impact The Holding Tube’s Temperature.


Q3. Metering Pump, Which Is Commonly Used In Aseptic Processing Is?

A. Positive Displacement Pump
B. Centrifugal Pump
C. Radial Flow Pump
D. Axial Flow Pump

ANSWER – A. Positive Displacement Pump

  • Explanation- A Continuous Flow Of Product Through A Holding Tube Is Used In Aseptic Procedures. Because Positive Displacement Pumps Are Less Sensitive To Pressure Drops And Slippage Than Centrifugal Pumps, They Are Utilized As The Metering (Or Timing) Pumps. The Product Features May Determine The Type Of Positive Displacement Pump Utilized.


Q4. Puddings May Best Be Processed Through A?

A. Plate Heat Exchangers
B. Tubular Heat Exchangers
C. Scraped Surface Heat Exchangers
D. None Of The Above

ANSWER: C. Scraped Surface Heat Exchangers

  • Explanation: A Jacketed Cylinder With A Spinning Dasher That Houses Rows Of Scraper Blades Makes Up A Scraped Surface Heat Exchanger. In The Dairy, Chemical, And Pharmaceutical Sectors, Scraped Surface Heat Exchangers Are Commonly Used For Heat Transfer, Crystallization, And Other Continuous Operations. It Works Well With Thick, Sticky, Or Particulate-Containing Compounds That Require Some Crystallization. Hence They Are Best Suited For The Processing Of Pudding.


Q5. After Sterilization By Heat Or Chemicals, The Aseptic Environment Is Maintained Sterile Using ______?

A.  Filtered Air Or Inert Gas
B. Carbon Materials
C. HCL Solution
D. Ambient Air

ANSWER – A.  Filtered Air Or Inert Gas

  • Explanation – Using Sterile Air Or Inert Gas To Maintain An Aseptic Environment Is Recommended After Sterilization By Heat Or Chemicals. High-Efficiency Particulate Air (HEPA) Filters Must Filter The Air Supplied To A Cleanroom. The Vertical And Horizontal Laminar Airflow Benches Are Built With HEPA Filters. The Air Filtered From The Laminar Airflow Is 99.97 Percent Microbial-Free.


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