Home › Previous year questions › GATE 2025 MN › Question 22GATE 2025 MN – Question 22 Surface Environment, Mine Ventilation and Underground Hazards · Mine Ventilation · 1 mark · Multiple choice
A depillaring face has both dry- and wet-bulb temperatures of30°C. Find relative humidity in percent.
0 30 60 100 Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (D) 100
Explanation Equal wet- and dry-bulb temperatures imply no evaporative cooling of the wet bulb. The air is saturated at that temperature, so vapour pressure equals saturation pressure and relative humidity is100%, D.
More Mine Ventilation questions GATE 2025 MN Q24 – Match fan-curve points P,Q,R to1 stall point,2 operating point,3 theoretical shut-off… GATE 2025 MN Q32 – Airways of resistance4.0,6.25 and9.0 N s²/m⁸ are in parallel. Find equivalent resistance… GATE 2025 MN Q40 – The airway is a rectangle topped by a semicircle of radius r. Its full perimeter is20 m… GATE 2025 MN Q61 – Air flows at1.2 m/s through a900 m road of height2.5 m and width3 m. Friction coefficient… GATE 2024 MN Q13 – An airway 2.0 m wide and 2.5 m high turns throughπ/4 radians with 4.0 m bend radius. Find… GATE 2024 MN Q37 – Four identical districts have total flow 3500 m³/min at stated fan-drift pressure 1.15… All Mine Ventilation questions →