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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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Engineering Mechanics
Engineering Mechanics Static and Dynamics
Strength of Materials
Springs Simple Stress and Strain Complex Stresses Pure Bending Moment of Inertia Shear Force and Bending Moment Stresses In Beams Deflection of Beams Columns and Struts Torsion Strain Energy Method Thin Cylinders
Theory of Machines
Analysis of Plane Mechanisms Gears and Gear Trains Vibrations Flywheel
Engineering Mathematics
Linear Algebra Vector Calculus Probability and Statistics Differential Equations Transform Theory Calculus Complex Variable Numerical Methods
Machine Design
Bolted Riveted and Welded Joints Design For Static Loading Design of Brakes and Clutches Design of Spur Gears Design of Bearings Fatigue Strength
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Fluid Properties Boundary Layer Turbulent Flow Fluid Dynamics Laminar Flow Fluid Kinematics Fluid Statics
Turbo Machinery
Turbo Machinery
Heat Transfer
Conduction Fin Design and Transient Heat Conduction Convection Radiation Heat Exchangers
Thermodynamics
Properties of Pure Substances Basic Concepts and Zeroth Law First Law of Thermodynamics Calculation of Work and Heat Entropy and Irreversibility Rankine Cycle Availability Second Law of Thermodynamics
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