Food Engineering

Food Processing Techniques-2

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following statements is true?
Multi-target preservation helps to target many factors such as pH, temperature etc and hence helps fight all types of microbes
It is desired to reduce the antagonist effects
Sometimes hurdle technology has antagonist effects
All of the mentioned
Explanation:
Multi-target preservation helps to target many factors such as pH, temperature etc and hence helps fight all types of microbes. Sometimes, instead of having a positive effect, hurdle technology has antagonist effects. This means that the combination of techniques used for food preservation don’t kill the microbes already present and just inhibit the growth. It could also mean, the mixture concentration required to produce the desired effect is more than that of the individual concentrations.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following methods refers to deactivation of microbes in food using electricity?
Power Ultrasound
Pulsed Electric field
Hurdle technology
All of the mentioned
Explanation:
Pulsed Electric field (PEF) refers to the deactivation of microbes in food using electricity.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
In Pulsed Electric field, since no heat is used, the aroma and flavour of food are retained.
True
False
Explanation:
In Pulsed Electric field, since no heat is used, the aroma and flavour of food are retained.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: In Pulsed Electric field, food is kept between two electrodes and electricity is passed to deactivate microbes.
True, False
True, True
False, False
False, True
Explanation:
Both the statements pertaining to Pulsed Electric field are true.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Pulsed Electric field needs to followed by refrigeration storing to increase shelf life and prevent spoilage.
True, False
True, True
False, False
False, True
Explanation:
Both the statements are true.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Certain antioxidants (e.g. – Nisin) can be used with the organic acids to reduce certain micro flora.
True
False
Explanation:
The statement is true.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is true about Sound Ultrasound?
Generates mechanical energy to enhance chemical action on surfaces
Scrubbing action loosens the dirt particles and cleans the food particle
Generates mechanical energy to enhance chemical action on surfaces & Scrubbing action loosens the dirt particles and cleans the food particle
None of the mentioned
Explanation:
Both the statements given are true.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following holds true for Pulsed Electric field?
It has been successful in pasteurizing milk, yogurt, soup etc
If there are no air bubbles present or the if food has low electrical conductivity, PEF is non-applicable
It’s a continuous process. It cannot be applied for non-pump able solid food products
All of the mentioned
Explanation:
All the statements pertaining to Pulsed Electric field are true.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which of the following combination of processing and preservation techniques works best for smoked products?
Salt and acidification
Heat and solid content
Heat, salt, acidification/minimal moisture content
Heat, salt, dipping in brine/ minimal moisture content
Explanation:
Several combinations of processing and preservation techniques are required and used for food products, the combination that best suits smoked products is – Heat, salt, dipping in brine. Not all smoked products need to be dipped in brine. Some might need minimal moisture content.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: When several factors for food processing and preservation are applied to one food product, it is called Hurdle technology.
True, False
True, True
False, False
False, True
Explanation:
Both the statements pertaining to Hurdle technology are true.