GATE XE 2022 Paper 1 — page 36

Questions 106–108 of 175. Imported answers require review unless explicitly marked reviewed.

A room contains air at 25 °C, 100 kPa and 80% relative humidity. If the saturation pressure of water vapor at 25 °C is 3.1698 kPa, then the specific humidity of air is ______ kg of water vapor / kg of dry air (round off to 4 decimal places).

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An insulated rigid container is divided into two parts by a thin partition. One part of the container contains 6 kg of saturated liquid-vapor mixture with a dryness fraction of 0.7 at 0.3 MPa. The other part contains 12 kg of saturated liquid at 0.6 MPa of the same substance. When the partition is removed and the system attains equilibrium, the final specific volume of the mixture is ______ m³/kg (round off to 2 decimal places).

Use the following property values:

At 0.3 MPa:

m³/kg,

m³/kg

At 0.6 MPa:

m³/kg,

m³/kg

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During a steady state air-conditioning process, air enters a heating section at 15 °C with 40% relative humidity and leaves at 30 °C. Assuming the heating section takes place at 100 kPa, the relative humidity of the air at exit is ______ % (round off to nearest integer).

Saturation pressures of water vapor at 15 °C and 30 °C are 1.7057 kPa and 4.2469 kPa respectively.

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2022 · Paper 1

Question 106

Question 107

Question 108