1
GATE ME 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
A $$10$$ $$mm$$ diameter electrical conductor is covered by an insulation of $$2$$ $$mm$$ thickness. The conductivity of the insulation is $$0.08$$ $$W/m$$-$$K$$ and the convection coefficient at the insulation surface is $$10$$ $$W/{m^2}$$ -$$K.$$ Addition of further insulation of the same material will
A
increase heat loss continuously
B
decrease heat loss continuously
C
increase heat loss to a maximum and then decrease heat loss
D
decrease heat loss to a minimum and then increase heat loss
2
GATE ME 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
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
3
GATE ME 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
For flow of viscous fluid over a flat plate, if the fluid temperature is the same as the plate temperature, the thermal boundary layer is
A
thinner than the velocity boundary layer
B
thicker than the velocity boundary layer
C
of the same thickness as the velocity boundary layer
D
not formed at all
4
GATE ME 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
For flow through a pipe of radius $$R,$$ the velocity and temperature distribution are as follows:
$$U\left( {r,x} \right) = {C_1}$$ and $$T\left( {r,x} \right) = {C_2}\left[ {1 - {{\left( {{r \over R}} \right)}^3}} \right],$$
where $${C_1}$$ and $${C_2}$$ are constants. The bulk mean temperature is given by


$${T_m} = {2 \over {{U_m}{R^2}}}\int\limits_0^R {u\left( {r,x} \right)T\left( {r,x} \right)rdr,} $$
with $${{U_m}}$$ being the mean velocity of flow. The value of $${T_m}$$ is

A
$${{0.5{C_2}} \over {{U_m}}}$$
B
$${0.5{C_2}}$$
C
$${0.6{C_2}}$$
D
$${{0.6{C_2}} \over {{U_m}}}$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12