Aerospace Engineering
2018 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE AE 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 45
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Air at 50 kPa pressure and 400 K temperature flows in a duct at Mach 3.0. A part of the flow leaks through an opening on the duct wall into the ambient, where the pressure is 30 kPa. The maximum Mach number achieved in the discharge is ______ (accurate to two decimal places). (Ratio of specific heats of air is
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Consider a 20° half-angle wedge in a supersonic flow at Mach 3.0 at standard sea-level conditions. If the shock-wave angle on the wedge is 36°, the Mach number of the tangential component of the flow post-shock is ______ (accurate to two decimal places).
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The boundary layer thickness at the location of a sensor on a flat plate in an incompressible, laminar flow of air is required to be restricted to 1 mm for an effective measurement. If the flow velocity is 20 m/s with 1 bar pressure, 300 K temperature, and 1.789×10
kg/(m-s) viscosity, the maximum distance (in mm) of the sensor location from the leading edge is _______ (accurate to one decimal place).Log in to check the answer
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