1
GATE ME 2014 Set 4
MCQ (Single Correct Answer)
+2
-0.6
Consider a velocity field $$\overrightarrow V = K\left( {y\widehat i + x\widehat k} \right),$$ where $$K$$ is a constant. The vorticity, $${\Omega _z},$$ is
A
$$-K$$
B
$$K$$
C
$$-K/2$$
D
$$K/2$$
2
GATE ME 2014 Set 4
MCQ (Single Correct Answer)
+1
-0.3
As the temperature increases, the thermal conductivity of a gas
A
increases
B
decreases
C
remains constant
D
increases up-to a certain temperature and then decreases
3
GATE ME 2014 Set 4
Numerical
+2
-0
A plane wall has a thermal conductivity of $$1.15$$ $$W/m.K.$$ If the inner surface is at $${1100^ \circ }C$$ and the outer surface is at $${350^ \circ }C$$, then the design thickness (in meter) of the wall to maintain a steady heat flux of $$2500\,\,W/{m^2}$$ should be ____________.
Your input ____
4
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
$$P - 2,\,\,Q - 1,\,\,R - 3,\,\,S - 4$$
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