1
GATE ME 2006
MCQ (Single Correct Answer)
+2
-0.6
A smooth flat plate with a sharp leading edge is placed along a gas stream flowing at $$U = 10\,m/s.$$ The thickness of the boundary layer at section $$r$$- $$s$$ is $$10$$ $$mm,$$ the breadth of the plate is $$1$$ $$m$$ (into the paper) and the density of the gas, $$\rho = 1.0\,kg/{m^3}.$$ Assume that the boundary layer is thin, two-dimensional, and follows a linear velocity distribution, $$u = U\left( {y/\delta } \right),$$ at the section $$r$$-$$s$$, where $$y$$ is the height from plate. GATE ME 2006 Fluid Mechanics - Boundary Layer Question 4 English

The integrated drag force (in $$N$$) on the plate, between $$p$$-$$s$$, is

A
$$0.67$$
B
$$0.33$$
C
$$0.17$$
D
zero
2
GATE ME 2006
MCQ (Single Correct Answer)
+1
-0.3
In a composite slab, the temperature at the interface (Tinter) between two materials is equal to the average of the temperatures at the two ends. Assuming steady one-dimensional heat conduction, which of the following statements is true about the respective thermal conductivities? GATE ME 2006 Heat Transfer - Conduction Question 37 English
A
$$2{K_1} = {K_2}$$
B
$${K_1} = {K_2}$$
C
$$2{K_1} = 3{K_2}$$
D
$${K_1} = 2{K_2}$$v
3
GATE ME 2006
MCQ (Single Correct Answer)
+2
-0.6
With an increase in the thickness of insulation around a circular pipe, heat loss to surroundings due to
A
Convection increases, while that due to conduction decreases
B
Convection decreases, while that due to conduction increases
C
Convection and conduction decreases
D
Convection and conduction increases
4
GATE ME 2006
MCQ (Single Correct Answer)
+2
-0.6
A $$100$$ $$W$$ electric bulb was switched on in a $$2.5 \times 3 \times 3m$$ size thermally insulated room having temperature of $${20^0}C.$$ Room temp at the end of $$24$$ hours will be
A
$${321^ \circ }C$$
B
$${341^ \circ }C$$
C
$${450^ \circ }C$$
D
$${470^ \circ }C$$
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