GATE XE concept:flow-rate PYQs & Answers

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.

Topic practice 4 questionsPage 1 of 1

A tubular centrifuge separates 5 micron particles of density 1500 kg/m³ from a slurry. The slurry is fed at a volumetric flow rate of 0.5 m³/s. The equivalent clarification area of the centrifuge is ______ m². (Answer in integer)

Assume g = 10 m/s² and for water, density = 1000 kg/m³, coefficient of viscosity (μ) = 10⁻³ Pa-s

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Cow milk is pasteurized at a flow rate of 1 kg.s⁻¹ in a counter-current heat exchanger using hot water as the heating medium. The milk enters the heat exchanger at 15 °C and exits at 50 °C. The specific heat of cow milk is 3.5 kJ.kg⁻¹.°C⁻¹ and remains constant at the inlet and exit of the heat exchanger. The inlet and exit temperatures of the hot water are 75 °C and 60 °C respectively. If the overall heat transfer coefficient is 1800 W.m⁻².°C⁻¹, the heat transfer surface area in m² is _____ (rounded off to 2 decimal places). Assume steady state conditions.

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The whole milk at 22 °C is pumped through a stainless steel pipe at a flow rate of 3 L s⁻¹. The length and inner diameter of the pipe are 40 m and 4 cm, respectively. If viscosity and density of the milk at the pumping temperature of 0.2 Pa s and 1032 kg m⁻³, respectively, the Reynolds number (rounded off to nearest integer) will be ______.

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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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GATE XE concept:flow-rate PYQs

How to practice concept:flow-rate

Question 153

Question 153

Question 19

Question 17