Engineering Sciences
GATE XE topic:engineering-sciences PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 1772. Imported answers require independent review unless marked reviewed.
Question 41
Open questionXE-BNAT2 marksNeeds review
For a steady, laminar, and incompressible flow over a flat plate, the local skin friction coefficient is given as
; where
is the local Reynolds number. The density and kinematic viscosity of the fluid are 1.2 kg.m
and
m
.s
, respectively. If the freestream velocity is 3 m.s
, then the local shear stress (in N.m
) at
m is __________. (rounded off to three decimal places)Log in to check the answer
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Open questionXE-BNAT2 marksNeeds review
The axial velocity profile of a laminar, incompressible, and fully-developed flow in a circular pipe of radius
is given as
, where
,
,
, and
are dynamic viscosity, pressure, axial coordinate, and radial coordinate, respectively. If the magnitude of shear stress at the pipe wall is given as
, then the value of
is __________. (answer in integer)Log in to check the answer
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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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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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Open questionXE-CMCQ1 markNeeds review
Which one of the following polymer processing techniques involves shaping a heated sheet?
Your answerChoose one option.
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Open questionXE-CMSQ1 markNeeds review
The plot shows three different paths (1, 2, and 3) connecting the initial equilibrium state X to the final equilibrium state Y in a thermodynamic process. Which of the following statements is/are correct?
Your answerSelect all correct options. You can choose more than one.
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Open questionXE-CMSQ1 markNeeds review
Which of the following is/are polarization mechanisms in dielectric solids?
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Open questionXE-CMSQ1 markNeeds review
Which of these methods is/are used for the synthesis of ceramic powders?
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Open questionXE-CNAT1 markNeeds review
The degrees of freedom of a system with 2 components and 2 phases in equilibrium is ________ (answer in integer).
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