Engineering Sciences
2026 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XE 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 197. Imported answers require review unless explicitly marked reviewed.
Question 43
Open questionXE-BNAT2 marksNeeds review
Air flows through a pipe of diameter
with an average velocity of 3 m.s
. The Darcy friction factor of the pipe is 0.02. Assume acceleration due to gravity as 10 m.s
. If the head loss per meter is 0.05, the diameter (in m) of the pipe is __________. (rounded off to two decimal places)Log in to check the answer
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Open questionXE-CMCQ1 markNeeds review
The band gap of a material is E
and the energy of an incident photon is E
. Optical absorption will occur in this material if,Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionXE-CMCQ1 markNeeds review
Discoloration and loss of mechanical strength of plastic chairs exposed to sunlight for several days is due to
Your answerChoose one option.
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