1
GATE ME 2014 Set 4
MCQ (Single Correct Answer)
+1
-0.3
Match Group $$A$$ with Group $$B$$

Group-A
$$P:$$$$\,\,\,\,\,\,\,$$ Biot number
$$Q:$$$$\,\,\,\,\,\,\,$$ Grashof number
$$R:$$$$\,\,\,\,\,\,\,$$ Prandtl number
$$S:$$$$\,\,\,\,\,\,\,$$ Reynolds number

Group-B
$$1:$$$$\,\,\,\,\,\,\,$$ Ratio of buoyancy to viscous force
$$2:$$$$\,\,\,\,\,\,\,$$ Ratio of inertia force to viscous force
$$3:$$$$\,\,\,\,\,\,\,$$ Ratio of momentum to thermal diffusivities
$$4:$$$$\,\,\,\,\,\,\,$$ Ratio of internal thermal resistance to boundary layer thermal resistance

A
$$P - 4,\,\,Q - 1,\,\,R - 3,\,\,S - 2$$
B
$$P - 4,\,\,Q - 3,\,\,R - 1,\,\,S - 2$$
C
$$P - 3,\,\,Q - 2,\,\,R - 1,\,\,S - 4$$
D
$$P - 2,\,\,Q - 1,\,\,R - 3,\,\,S - 4$$
2
GATE ME 2009
MCQ (Single Correct Answer)
+1
-0.3
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
$$10$$
3
GATE ME 2008
MCQ (Single Correct Answer)
+1
-0.3
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
$$1000mm$$
4
GATE ME 1998
MCQ (Single Correct Answer)
+1
-0.3
Heat transfer coefficients for free convection in gasses, forced convection in gases and vapors, and for boiling water lie, respectively, in the range of
A
$$5-15, 20-200$$ and $$3000-50000$$ $$W/{m^2}K$$
B
$$20-50, 200-500,$$ and $$50000-100000$$ $$W/{m^2}K$$
C
$$50-100, 500-1000$$ and $$100000-1000000$$ $$W/{m^2}K$$
D
$$20-100, 200-1000$$ and a constant $$1000000$$ $$W/{m^2}K$$
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Turbo Machinery
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Graduate Aptitude Test in Engineering
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