GATE Propulsion: Turbomachinery: Axial compressors, work and compression, degree of reaction, multi-staging – Previous Year Questions

12 GATE previous year questions on Turbomachinery: Axial compressors, work and compression, degree of reaction, multi-staging (Propulsion, Aerospace Engineering) with answers and explanations, from every paper.

GATE 2021 AE Q56 (2 marks, Numerical answer) – At design conditions, a single-stage axial compressor has rotor exit blade angle 30°, absolute inlet/exit velocities 140/240 m/s and relative…
GATE 2022 AE Q30 (1 mark, Multiple select) – A high-pressure-ratio multistage axial compressor encounters an extreme loading mismatch during starting. Which of the following technique(s) can be…
GATE 2022 AE Q65 (2 marks, Numerical answer) – A multistage axial compressor receives air at 1 atm,300 K and compresses it to at least 5 atm. Mean blade speed U=245 m/s and stage work coefficient h…
GATE 2023 AE Q20 (1 mark, Multiple choice) – In a single-spool aviation turbojet engine, which of the following is the correct relationship between the total work output WT of a 2-stage axial…
GATE 2023 AE Q21 (1 mark, Multiple choice) – For a stage of a 50% reaction ideal axial flow compressor (symmetrical blading), select the correct statement from the options given.
GATE 2026 AE Q27 (1 mark, Multiple select) – The figure below shows the blading of the rotors of two different axial turbomachines under their typical operating conditions, labelled as…
GATE 2026 AE Q28 (1 mark, Multiple select) – A multi-stage axial compressor can be operated at two points, A and B, both of which lie on the same speed line, as shown in the figure below. If is…
GATE 2026 AE Q42 (2 marks, Multiple choice) – The figure below shows a compressor stage with station numbers 1, 2, and 3 as indicated. If p 0i, T 0i, and C i refer to the average values of total…
GATE 2026 AE Q46 (2 marks, Multiple select) – The figure below shows the velocity triangles at the inlet and outlet of the rotor of a low hub-to-tip ratio axial compressor at the mid-span of the…
GATE 2025 AE Q65 (2 marks, Numerical answer) – A single-stage axial compressor, with a 50 % degree of reaction, runs at a mean blade speed of 250 m/s. The overall pressure ratio developed is 1.3.…
GATE 2024 AE Q40 (2 marks, Multiple choice) – A multistage axial compressor, with overall isentropic efficiency of 0.83, is used to compress air at a stagnation temperature of 300 K through a…
GATE 2024 AE Q50 (2 marks, Multiple select) – Which of the following statements is/are TRUE for a single stage axial compressor?