Food Engineering Questions and Answers – Unit Operations – Mixing-1

This set of Food Engineering Multiple Choice Questions & Answers (MCQs) focuses on ” Unit Operations – Mixing-1″.

1. Which of the following with respect to mixing is true?
a) It is used to distribute heat uniformly to all the components of the mixture
b) Mixing becomes difficult when one of the phases to be mixed is in minor quantity
c) Solid-solid mixing is more difficult than other phases
d) All of the mentioned
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2. Statement 1: Root mean square is denoted by σ₂
Statement 2: σ₂ will show the variation of a composition obtained after mixing. Hence the lesser it is, the more efficient is the mixing.
a) True, False
b) True, True
c) False, False
d) False, True
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3. Mixing index is applicable for mixing of solids at zero time.
a) True
b) False
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4. Which of the following conditions show that a certain industrial mixer is the best?
a) Power load for mixing is minimum
b) Standard deviation is minimum
c) Time required for mixing is minimum
d) All of the mentioned
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5. Mixing Index is a ratio of the standard deviation of various products during mixing to that at zero mixing.
a) True
b) False
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6. Rate of mixing at any time is given by the extent of mixing at that particular time.
a) True
b) False
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7. The force used for mixing by mixing equipment for pastes and dough is _____
a) Centrifugal smearing
b) Impact
c) Tumbling
d) All of the mentioned
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8. The clearance between the impeller and the vessel in a mixer is usually kept _____
a) High
b) Low
c) Cannot be determined
d) None of the mentioned
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9. Statement 1: Kneaders are specially used for pastry/viscous liquids in the food industry.
Statement 2: Kneaders are used for mixing dough with fats and making them homogeneous mixtures.
a) True, False
b) True, True
c) False, False
d) False, True
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10. Statement 1: Effectiveness of mixing in kneaders depends on the blade design.
Statement 2: Kneaders have a high clearance between the two oppositely rotating blades and the vessel.
a) True, False
b) True, True
c) False, False
d) False, True
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11. Statement 1: Which mixture is used when one of the components is very less in quantity?
Statement 2: This mixer is used to mix items in savory or a snack item.
a) Ribbon mixer, planetary mixer
b) Planetary mixer, double cone mixer
c) Double cone mixer, double cone mixer
d) Planetary mixer, planetary mixer
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12. Which of the following is true with respect to mixing operations in the food industry?
a) Ice creams
b) Confectionery products
c) Chlorinated waters
d) All of the mentioned
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Sanfoundry Global Education & Learning Series – Food Engineering.

To practice all areas of Food Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.