1
GATE ME 2017 Set 2
+1
-0.3
Consider a laminar flow at zero over a flat plate . The shear stress at the wall is denoted by $${\tau _w}.$$ The axial positions $${x_1}$$ and $${x_2}$$ on the plate are measured from the leading edge in the direction of flow. If $${x_2} > {x_1},$$ then
A
$${\tau _w}\left| {_{{x_1}} = {\tau _w}} \right|{}_{{x_2}} = 0$$
B
$${\tau _w}\left| {_{{x_1}} = {\tau _w}} \right|{}_{{x_2}} \ne 0$$
C
$${\tau _w}\left| {_{{x_1}} > {\tau _w}} \right|{}_{{x_2}}$$
D
$${\tau _w}\left| {_{{x_1}} < {\tau _w}} \right|{}_{{x_2}}$$
2
GATE ME 2017 Set 1
+1
-0.3
For steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?
A
It increases until the flow is fully developed.
B
It is constant and is equal to the average velocity in the fully developed region.
C
It decreases until the flow is fully developed.
D
It is constant but always lower than the average velocity in the fully developed region.
3
GATE ME 2015 Set 3
+1
-0.3
Three parallel pipes connected at the two ends have flow-rates $$\,\,\,{Q_1},\,\,\,{Q_2},\,\,\,\,$$ and $${Q_3}$$ respectively, and the corresponding frictional head losses are $${h_{L1}},\,\,\,{h_{L2}},$$ and $${h_{L3}}$$ respectively. The correct expressions for total flow rate $$(Q)$$ and frictional head loss across the two ends $$\left( {{h_L}} \right)$$ are.
A
$$Q = {Q_1} + {Q_2} + {Q_3};\,\,\,\,\,\,\,\,\,\,{h_L} = {h_{L1}} + {h_{L2}} + {h_{L3}}$$
B
$$Q = {Q_1} + {Q_2} + {Q_3};\,\,\,\,\,\,\,\,\,\,{h_L} = {h_{L1}} = {h_{L2}} = {h_{L3}}$$
C
$$Q = {Q_1} = {Q_2} = {Q_3};\,\,\,\,\,\,\,\,\,\,{h_L} = {h_{L1}} + {h_{L2}} + {h_{L3}}$$
D
$$Q = {Q_1} = {Q_2} = {Q_3};\,\,\,\,\,\,\,\,\,\,{h_L} = {h_{L1}} = {h_{L2}} = {h_{L3}}$$
4
GATE ME 2015 Set 3
+1
-0.3
Couette flow is characterized by
A
Steady, incompressible, laminar flow through a straight circular pipe
B
Fully developed turbulent flow through a straight circular pipe
C
Steady, incompressible, laminar flow between two fixed parallel plates
D
Steady, incompressible, laminar flow between one fixed plate and the other moving with a constant velocity
GATE ME Subjects
Engineering Mechanics
Machine Design
Strength of Materials
Heat Transfer
Production Engineering
Industrial Engineering
Turbo Machinery
Theory of Machines
Engineering Mathematics
Fluid Mechanics
Thermodynamics
General Aptitude
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