Aerospace Engineering
2018 · Paper 1
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Complete GATE AE 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 54
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The relative velocity of air leaving a straight radial impeller of a centrifugal compressor is 100 m/s. If the impeller tip speed is 200 m/s, for a slip free operation, the absolute velocity (in m/s) at the impeller exit is ________ (accurate to one decimal place).
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An aircraft wind tunnel model, having a pitch axis mass moment of inertia (
) of 0.014 kg-m
, is mounted in such a manner that it has pure pitch motion about its centre of gravity, where it is supported through a frictionless hinge. If the pitching moment (M) derivative with respect to angle of attack (
), denoted by
, is −0.504 N-m/rad and the pitching moment (M) derivative with respect to pitch rate (q), denoted by
, is −0.036 N-m/(rad/s), the damping ratio of the resulting motion due to an initial disturbance in pitch angle is approximately ________ (accurate to three decimal places).Log in to check the answer
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