Engineering Sciences
GATE XE topic:food-engineering PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 60. Imported answers require independent review unless marked reviewed.
Question 5
Open questionXE-GMCQ1 markNeeds review
Ratio of Schmidt number to Lewis number is ________.
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Impeller in a fruit juice mixing tank is rotating at 200 rpm with a Reynolds number >10^4. Density of juice is 1045 kg m^-3. If diameter of the impeller is doubled and other conditions remained constant, the power requirement of mixing will increase by a factor of ______.
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Open questionXE-GNAT2 marksNeeds review
Buffalo milk having density of 1030 kg m⁻³ is homogenized with a pressure of 30 MPa. Given, acceleration due to gravity as 9.81 m s⁻² and assuming no pressure loss, the velocity (m s⁻¹) of the milk flowing through the homogenizer valve will be ______ (round off to 2 decimal places).
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A mixed fruit beverage with 12 °Brix having specific heat of 4298 J kg⁻¹ K⁻¹ is being heated from 30 °C to 95 °C for pasteurization at a flow rate of 1000 L h⁻¹ in a tubular heat exchanger. Steam at 100 °C is used as heating medium which is converted into condensate at 100 °C. If the density of beverage is 1075 kg m⁻³ and the latent heat of steam at the given temperature is 2257 kJ kg⁻¹, the mass flow rate of steam (kg min⁻¹) is ______ (round off to 2 decimal places).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 18
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Fruit juice was cooled in a tubular heat exchanger from 50 °C to 7 °C using water at 2 °C, which gets heated to 5 °C. Assume, Pr = 0.72, Re = 2000 and thermal conductivity = 0.6 W m⁻¹ °C⁻¹ and no viscous effect. If pipe diameter was 10 cm, the convective heat transfer coefficient (W m⁻² °C⁻¹) is ________ (round off to 1 decimal place).
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Room air is at 40 °C with 60% relative humidity. Saturated vapour pressure of water at 40 °C is 7.375 kPa. Volume of humid air (m³ per kg of dry air) is ____________ (round off to 3 decimal places).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 5
Open questionXE-GMCQ1 markNeeds review
Identify the correct statement related to the viscosity of Newtonian fluids from the following
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Ambient air at 30°C by bulb temperature and 80% relative humidity was heated to a dry bulb temperature of 80°C in a heat exchanger by indirect heating. The amount of moisture gain (g kg^ dry air) during the process would be ______.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 14
Open questionXE-GMCQ2 marksNeeds review
Match the operation in Group I with the process in Group II
Group I
P. Cleaning
Q. Grading
R. Size reduction
S. Filtration
Group II
Quality separation
Clarification
Screening
Comminution
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 16
Open questionXE-GMCQ2 marksNeeds review
Apple juice of 10% total solids (TS) is being concentrated in a single effect evaporator working with a surface condenser to 40% TS under a vacuum of 20 kPa. After some time the vacuum pump stops but the evaporation process continued. Choose the combination of possible implications from the following.
(P) Product quality is affected
(Q) Substantial increase in thermal energy requirement
(R) Decrease in the rate of evaporation
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