The specialised mine-fan term is evasee, C. Expansion reduces outlet air velocity and recovers part of its velocity pressure as static pressure. “Diffuser” is the more general fluid-mechanics description, but evasee is the specific component name sought by this examination.
More Mine Ventilation questions
GATE 2026 MN Q33– A500 m long circular airway of diameter5 m carries30 m³/s. With unchanged surface…
GATE 2026 MN Q34– A Kata thermometer takes60 s to fall from38°C to35°C. Its factor is480 millicalories/cm².…
GATE 2026 MN Q40– Two parallel ventilation districts A and B initially have common pressure drop ΔP and…
GATE 2026 MN Q52– A mine fan generates25 mm water gauge and an aiding natural-ventilation pressure is15 mm…
GATE 2025 MN Q22– A depillaring face has both dry- and wet-bulb temperatures of30°C. Find relative humidity…