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Heat Transfer
Conduction
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Fin Design and Transient Heat Conduction
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1
GATE ME 2024
MCQ (Single Correct Answer)
+1
-0.33

Consider incompressible laminar flow over a flat plate with freestream velocity of $u_{\infty}$. The Nusselt number corresponding to this flow velocity is $Nu_1$. If the freestream velocity is doubled, the Nusselt number changes to $Nu_2$. Choose the correct option for $Nu_{2}/Nu_{1}$.

A

$\sqrt{2}$

B

$2$

C

$1.26$

D

$1$

2
GATE ME 2024
MCQ (Single Correct Answer)
+1
-0.33

Consider a hydrodynamically fully developed laminar flow through a circular pipe with the flow along the axis (i.e., z direction). In the following statements, $T$ is the temperature of the fluid, $T_w$ is the wall temperature and $T_m$ is the bulk mean temperature of the fluid. Which one of the following statements is TRUE?

A

For a thermally fully developed flow, $\frac{\partial T}{\partial z} = 0,$ always.

B

For constant wall temperature of the duct, $\frac{dT_m}{dz} = $ constant.

C

Nusselt number varies linearly along the z direction for a thermally fully developed flow.

D

For constant wall temperature $(T_w > T_m)$ of the duct, $\frac{dT_m}{dz}$ increases exponentially with distance along z direction.

3
GATE ME 2023
MCQ (Single Correct Answer)
+1
-0.33
Consider incompressible laminar flow of a constant property Newtonian fluid in an isothermal circular tube. The flow is steady with fully-developed temperature and velocity profiles. The Nusselt number for this flow depends on
A
neither the Reynolds number nor the Prandtl number
B
both the Reynolds and Prandtl numbers
C
the Reynolds number but not the Prandtl number
D
the Prandtl number but not the Reynolds number
4
GATE ME 2022 Set 2
MCQ (Single Correct Answer)
+1
-0.33
Which of the following non-dimensional terms is an estimate of Nusselt number?
A
Ratio of internal thermal resistance of a solid to the boundary layer thermal resistance
B
Ratio of the rate at which internal energy is advected to the rate of conduction heat transfer
C
Non-dimensional temperature gradient 
D
Non-dimensional velocity gradient multiplied by Prandtl number
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Questions Asked from Marks 1
GATE ME 2024 (2) GATE ME 2023 (1) GATE ME 2022 Set 2 (1) GATE ME 2016 Set 3 (1) GATE ME 2015 Set 2 (1) GATE ME 2015 Set 1 (2) GATE ME 2015 Set 3 (1) GATE ME 2014 Set 4 (1) GATE ME 2014 Set 2 (2) GATE ME 2009 (1) GATE ME 2008 (1) GATE ME 1998 (1) GATE ME 1994 (1) GATE ME 1990 (1) GATE ME 1988 (1)
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