This set of Vegetables Processing Multiple Choice Questions & Answers (MCQs) focuses on “Fresh-Cut Vegetables”.
1. What is the other name for minimal processing?
a) Primary processing
b) Secondary processing
c) Tertiary processing
d) Final processing
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Explanation: There are two important purposes for minimal processing of foods. These processes have to maintain the product quality. It should also provide fresh products appropriately without losing its nutritional content. It should also guarantee that the product is hygiene and safe.
2. What chemical is used in lye peeling?
a) Sodium hydroxide
b) Calcium hydroxide
c) Sodium bicarbonate
d) Calcium bicarbonate
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Explanation: Lye peeling is a chemical method especially used vegetable peeling. The skin is removed in this process by dipping the vegetables in hot caustic soda or sodium hydroxide solution. It is then thoroughly washed to remove the dead skin and chemical.
3. What factors affect the peeling efficiency of lye peeler?
a) Temperature
b) Pressure
c) Relative humidity
d) Water activity
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Explanation: The important parameters that affect the peeling efficiency of a lye peeler are temperature and lye concentration. The exposure time also affects the efficacy of lye‐peeling. High immersing time can results in high losses.
4. Who invented peeler?
a) Alfred Neweczerzal
b) Robert Fulton
c) David Maydole
d) Hubert Cecil Booth
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Explanation: The vegetable peeler is invented by Alfred Neweczerzal. The Rex vegetable peeler was developed and patented in 1947. The peeler removes the tough skin attached to the vegetables and fruits. Peeling is done to remove the peel and also removes surface dirt.
5. What is a peeler made of?
a) Stainless steel
b) Iron
c) Aluminum
d) Nickel
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Explanation: Peelers are made of stainless steel blade. The steel blade is attached to a handle made of metal, rubber, stainless steel. The peelers are available in different sizes and shapes. The most common design is the sword shaped peeler.
6. For mechanical grading, the vegetables are passed over screens with holes of different diameter.
a) True
b) False
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Explanation: Grading can be done either manually or with the help of grading machines. For mechanical grading, the vegetables are passed over screens with holes of different diameter. Different types of mechanical graders include screen grader, roller grader, rope or cable grader etc. Screen graders fitted with vibrating screens of copper with circular openings are most commonly used.
7. Which of the following uses flame peeling?
a) Onion
b) Carrot
c) Tomato
d) Potato
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Explanation: Vegetables like onions, garlic and brinjal are peeled using flame peeling. The peeler is attached with a conveyor belt that carries and rotates vegetables through a chamber with a temperature more than 1000oC. The outer cover and root hairs of onion are scorched off and burnt skin is removed manually.
8. Which of the following uses abrasive peeling?
a) Onion
b) Carrot
c) Tomato
d) Garlic
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Explanation: Vegetables like ginger, potatoes and carrots are peeled using abrasive peeling method. The products are fed on to the rollers made of carborundum. It can also be placed into a rotating bowl which is lined with abrasive surface made of carborundum crystal. With the water, the rotating abrasive surface removes the peel or skin from the surface.
9. Which of the following uses hot water peeling?
a) Onion
b) Beans
c) Tomato
d) Garlic
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Explanation: The peaches and potatoes are scalded in steam or hot water for removing peel. This process softens and loosens the peel or skin, which is then removed physically. Infra-red heat peeling can also be used for apples and tomato peeling.
10. The peeled and sliced vegetables are dipped in 10-12% salt solution prevent enzymatic browning.
a) True
b) False
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Explanation: The peeled and sliced vegetables are dipped in 1-2% salt solution prevent enzymatic browning. The salt acts as inhibitor for polyphenol oxidase. Treatment of vegetables with boiling water or steam for short periods followed by immediate cooling prior to canning is called blanching.
Sanfoundry Global Education & Learning Series – Vegetables Processing.
To practice all areas of Vegetables Processing, here is complete set of 1000+ Multiple Choice Questions and Answers.
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