GATE AE 2021 Paper 1 — page 5

Questions 13–15 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 5 of 22

Consider the velocity field

. The field

is

Your answerChoose one option.

A.

divergence-free and curl-free

B.

curl-free but not divergence-free

C.

divergence-free but not curl-free

D.

neither divergence-free nor curl-free

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The figure shows schematics of wave patterns at the exit of nozzles A and B operating at different pressure ratios.

Nozzles A and B, respectively, are said to be operating in:

Your answerChoose one option.

A.

over-expanded mode and under-expanded mode

B.

under-expanded mode and perfectly expanded mode

C.

perfectly expanded mode and under-expanded mode

D.

under-expanded mode and over-expanded mode

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The combustion process in a turbo-shaft engine during ideal operation is:

Your answerChoose one option.

A.

isentropic

B.

isobaric

C.

isochoric

D.

isothermal

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2021 · Paper 1