1

### GATE ME 2016 Set 3

Grashof number signifies the ratio of
A
inertia force to viscous force
B
buoyancy force to viscous force
C
buoyancy force to inertia force
D
inertial force to surface tension force
2

### GATE ME 2015 Set 3

The ratio of momentum diffusivity $\left( \upsilon \right)$ to thermal diffusivity $\left( \alpha \right),$ is called
A
Prandtl number
B
Nusselt number
C
Biot number
D
Lewis number
3

### GATE ME 2015 Set 2

In the laminar flow of air $(Pr=0.7)$ over a heated plate, if $\delta$ and ${\delta _T}$ denote, respectively the hydrodynamic and thermal boundary layer thickness, then
A
$\delta = {\delta _t}$
B
$\delta > {\delta _t}$
C
$\delta < {\delta _t}$
D
$\delta = 0$ but ${\delta _t} \ne 0$
4

### GATE ME 2015 Set 1

The Blasius equation related to boundary layer theory is a
A
third-order linear partial differential equation
B
third-order nonlinear partial differential equation
C
second-order nonlinear ordinary differential equation
D
third-order nonlinear ordinary differential equation

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