Aerospace Engineering
GATE AE concept:efficiency-compressor PYQs
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How to practice concept:efficiency-compressor
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.
Question 28
Open questionAEMSQ1 markNeeds review
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 the isentropic efficiency of the compressor, select the statements that are TRUE. 
Your answerSelect all correct options. You can choose more than one.
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Open questionAEMCQ2 marksNeeds review
An axial compressor that generates a station pressure ratio of 4.0, operates with inlet and exit station temperatures of 300 K and 480 K, respectively. If the ratio of specific heats (
) is 1.4, the isentropic efficiency of the compressor isYour answerChoose one option.
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Open questionAENAT2 marksNeeds review
The given diagram represents the velocity triangles at the leading edge (1) and trailing edge (2) at the mean radius of a single stage axial compressor rotor. The stage efficiency of the compressor is 0.8. The stagnation temperature of air entering the stage is 298 K and the specific heat at constant pressure for air is 1.005 kJ/kgK. The ratio of specific heats for air is 1.4. Considering actual work in the rotor is equal to the ideal work, the pressure ratio for the stage is equal to ________ (in two decimal points).
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