Engineering Sciences
GATE XE year:2023 PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 175. Imported answers require independent review unless marked reviewed.
Question 41
Open questionXE-BNAT2 marksNeeds review
Water flows around a thin flat plate (0.25 m long, 2 m wide) with a free stream velocity (
) of 1 m/s, as shown in the figure. Consider linear velocity profile
for which the laminar boundary layer thickness is expressed as
. For water, density = 1000 kg/m
and dynamic viscosity = 0.001 kg/m.s. Net drag force (in N, rounded off to two decimal places) acting on the plate, neglecting the end effects, is ______. 
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Open questionXE-BNAT2 marksNeeds review
Axial velocity profile
for an axisymmetric flow through a circular tube of radius
is given as,
where
is the center velocity. If
refers to the area-averaged velocity (volume flow rate per unit area), then the ratio
for
(rounded off to two decimal places) is ______________.Log in to check the answer
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Open questionXE-BNAT2 marksNeeds review
A stationary circular pipe of radius
m is half filled with water (density = 1000 kg/m
), whereas the upper half is filled with air at atmospheric pressure, as shown in the figure. Acceleration due to gravity is
m/s
. The magnitude of the force per unit length (in kN/m, rounded off to one decimal place) applied by water on the pipe section AB is ______. 
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Open questionXE-CMCQ1 markNeeds review
In age-hardening of an aluminium alloy, the purpose of solution treatment followed by quenching is to
Your answerChoose one option.
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Open questionXE-CMCQ1 markNeeds review
The magnetization (M) – magnetic field (H) curves for four different materials are given below. Which one of these materials is most suitable for use as a permanent magnet?
Your answerChoose one option.
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Open questionXE-CMCQ1 markNeeds review
The band gap of a semiconducting material is ∼ 2 eV. Which one of the following absorption (A) vs. energy (in eV) curves is correct?
Your answerChoose one option.
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Open questionXE-CMCQ1 markNeeds review
Figures (i) and (ii) show a binary phase diagram and the corresponding Gibbs free energy (
) vs. composition (
) diagram, respectively. Figure (ii) corresponds to which one of the temperatures shown in Figure (i)? 
Your answerChoose one option.
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Open questionXE-CMCQ1 markNeeds review
Aliovalent doping of
in
leads to the formation of defects. Which one of the following is the correct defect reaction?Your answerChoose one option.
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Open questionXE-CMSQ1 markNeeds review
A screw dislocation in a FCC crystal has Burgers vector of
, where
is the lattice constant. The possible slip plane(s) is/are:Your answerSelect all correct options. You can choose more than one.
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Open questionXE-CNAT1 markNeeds review
The tensile true stress (
) – true strain (
) curve follows the Hollomon equation:
At the maximum load, the work-hardening rate
is (in MPa): ____________ (round off to nearest integer)Log in to check the answer
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