1
MCQ (Single Correct Answer)

GATE ME 2014 Set 2

Consider a two-dimensional laminar flow over a long cylinder as shown in the figure below. The free stream velocity is ${U_\infty }$ and the free stream temperature ${T_\infty }$ is lower than the cylinder surface temperature ${T_s}.$ The local heat transfer coefficient is minimum at point

A
$1$
B
$2$
C
$3$
D
$4$
2
MCQ (Single Correct Answer)

GATE ME 2014 Set 2

For laminar forced convection over a flat plate, if the free stream velocity increases by a factor of $2,$ the average heat transfer coefficient
A
remains same
B
decreased by a factor of $\sqrt 2$
C
rises by a factor of $\sqrt 2$
D
rises by a factor of $4$
3
MCQ (Single Correct Answer)

GATE ME 2009

A coolant fluid at ${30^ \circ }C$ flows over a heated flat plate maintained at a constant temperature of ${100^ \circ }C$. The boundary layer temp distribution at a given location on the plate may be approximated as $T=30+70exp(-y),$ where $y$ (in $m$) is the distance normal to the plate and $T$ is in $^ \circ C.$ If thermal conductivity of the fluid is $1.0W/mk,$ the local convective heat transfer (in $W/{m^2}K$) at that location will be
A
$0.2$
B
$1$
C
$5$
D
$10$
4
MCQ (Single Correct Answer)

GATE ME 2008

For flow of fluid over a heated plate, the following fluid properties are known: Viscosity $=0.001Pa.s;$ Specific heat at constant pressure $=1$ $kJ/kgK;$ Thermal conductivity $=$ $W/mK,$ The hydrodynamic boundary layer thickness at a specified location on the plate is $1mm,$ thermal boundary layer thickness at the same location is
A
$0.001mm$
B
$0.01mm$
C
$1mm$
D
$1000mm$

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