1
MCQ (Single Correct Answer)

GATE ME 2014 Set 4

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
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
$$4$$
3
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 $$4$$
4
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
$$10$$

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