List of top Engineering Sciences Questions on Food Technology asked in GATE XE

Potato slices weighing 50 kg is dried from 60% moisture content (wet basis) to 5% moisture content (dry basis). The amount of dried potato slices obtained (in kg) is ............ (Answer in integer)

Consider that specific heat (0 to 50°C) of water, water vapour, and air remains constant: 4.48, 1.88, and 1.0 kJ/(kg °C), respectively. Assuming, the heat energy required to convert 1 kg of water to water vapour at 0°C is 2000 kJ, the enthalpy (in kJ/kg dry air) of atmospheric air containing 0.05 kg water vapour per kg dry air at 50°C is ............. (rounded off to 1 decimal place).

A fruit juice is concentrated using an ultrafiltration membrane. A feed stream at 10 kg/min with 6% total solids (by weight) is increased to 20% total solids (by weight). The membrane tube has 10 cm inside diameter and the pressure difference across the membrane is 2000 kPa. If the permeability constant of the membrane is \( 5 \times 10^{-5} \, {kg water} / ({m}^2 {kPa s}) \), the length of membrane tube (in m) is ............. (rounded off to 2 decimal places).

Potato slices weighing 50 kg is dried from 60% moisture content (wet basis) to 5% moisture content (dry basis). The amount of dried potato slices obtained (in kg) is ............ (Answer in integer)

Consider that specific heat (0 to 50°C) of water, water vapour, and air remains constant: 4.48, 1.88, and 1.0 kJ/(kg °C), respectively. Assuming, the heat energy required to convert 1 kg of water to water vapour at 0°C is 2000 kJ, the enthalpy (in kJ/kg dry air) of atmospheric air containing 0.05 kg water vapour per kg dry air at 50°C is ............. (rounded off to 1 decimal place).

A fruit juice is concentrated using an ultrafiltration membrane. A feed stream at 10 kg/min with 6% total solids (by weight) is increased to 20% total solids (by weight). The membrane tube has 10 cm inside diameter and the pressure difference across the membrane is 2000 kPa. If the permeability constant of the membrane is \( 5 \times 10^{-5} \, {kg water} / ({m}^2 {kPa s}) \), the length of membrane tube (in m) is ............. (rounded off to 2 decimal places).