Food Engineering

Unit Operations

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Bucket conveyors can be divided into close and spaced bucket conveyors.
True, False
True, True
False, False
False, True
Explanation:
Bucket conveyors can be divided both the ways based on different parameters.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Kneaders are specially used for pastry/viscous liquids in the food industry.
True, False
True, True
False, False
False, True
Explanation:
Kneaders are specially used for pastry/viscous liquids in the food industry. Kneaders are used for mixing dough with fats and making them homogeneous mixtures.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step.
True, False
True, True
False, False
False, True
Explanation:
Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step as the resistance during this is maximum.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
A ball mill uses _____
Impact
Attrition
Impact & Attrition
None of the mentioned
Explanation:
A ball mill uses both impacts when the solids fall from the top to the bottom and attrition when the particles rub against each other and reduce in size.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Mixed feed arrangement offers the advantage of omitting the usage of pumps by transferring feed in the direction of low pressure. That’s an advantage taken from forward feeding arrangement.
True
False
Explanation:
Mixed feed arrangement offers the advantage of omitting the usage of pumps by transferring feed in the direction of low pressure. That’s an advantage taken from forward feeding arrangement.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following factor does the rate of filtration depend on?
Compressibility factor of the filtrate
Pressure drop
Compressibility factor of the filtrate & Pressure drop
Neither of the mentioned
Explanation:
Rate of filtration depends on both of the mentioned factors.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
When the mass balance in a distillation column is F = B + D, how can D that is the distillate be increased?
Decreasing vacuum in distillation unit
Increase vacuum in distillation unit
None of the mentioned
Increasing & Decreasing vacuum in distillation unit
Explanation:
By increasing the vacuum in the distillation unit, the vapor-liquid separation takes place.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: α=k/(ρCp)
True, False
True, True
False, False
False, True
Explanation:
α=k/(ρCp). α stands for thermal diffusivity.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Using hot water for decoction followed by spraying drying is the procedure used for making instant coffee.
True
False
Explanation:
Using hot water for decoction followed by spraying drying is the procedure used for making instant coffee.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which among the following factors does NOT affect extraction?
Solubility of solute in the solvent
Degree of agitation
Concentration difference
None of the mentioned
Explanation:
All the given factors affect extraction.