GATE ME 1998 | Convection Question 25 | Heat Transfer

GATE ME 1998

MCQ (Single Correct Answer)

-0.3

Heat transfer coefficients for free convection in gasses, forced convection in gases and vapors, and for boiling water lie, respectively, in the range of

$$5-15, 20-200$$ and $$3000-50000$$ $$W/{m^2}K$$

$$20-50, 200-500,$$ and $$50000-100000$$ $$W/{m^2}K$$

$$50-100, 500-1000$$ and $$100000-1000000$$ $$W/{m^2}K$$

$$20-100, 200-1000$$ and a constant $$1000000$$ $$W/{m^2}K$$

GATE ME 1994

True or False

-0

For air near atmospheric condition flowing over a flat plate the laminar thermal boundary layer is thicker than hydrodynamic boundary layer

TRUE

FALSE

GATE ME 1990

MCQ (Single Correct Answer)

-0.3

In pool boiling the highest $$HTC$$ occurs in

Sub-cooled boiling zone

Nucleate boiling zone

Partial film boiling zone

Film boiling zone

GATE ME 1988

MCQ (Single Correct Answer)

-0.3

For the fluid flowing over a flat plate with Prandtle number greater than unity, the thermal boundary layer for laminar forced convection

is thinner than the hydrodynamic boundary layer

Has thickness equal to zero

is of same thickness as hydrodynamic boundary layer

is thicker than the hydrodynamic boundary layer

GATE ME Subjects

Engineering Mechanics

Engineering Mechanics Static and Dynamics

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

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

Heat Transfer

Conduction Fin Design and Transient Heat Conduction Convection Radiation Heat Exchangers

Production Engineering

Metrology and Inspection Sheet Metal Forming Processes Welding Process Metal Forming Metal Cutting Advance Machine Tools Machining Casting

Industrial Engineering

Queuing Production Planning and Control Line Balancing Forecasting Pert and Cpm Inventory Control Transportation Scheduling Linear Programming Assignment

Turbo Machinery

Theory of Machines

Vibrations Gears and Gear Trains Flywheel Analysis of Plane Mechanisms

Engineering Mathematics

Linear Algebra Vector Calculus Probability and Statistics Differential Equations Transform Theory Calculus Complex Variable Numerical Methods

Fluid Mechanics

Fluid Properties Fluid Statics Boundary Layer Turbulent Flow Laminar Flow Fluid Dynamics Fluid Kinematics

Thermodynamics

Calculation of Work and Heat Entropy and Irreversibility Properties of Pure Substances Basic Concepts and Zeroth Law First Law of Thermodynamics Rankine Cycle Availability Second Law of Thermodynamics

General Aptitude

Verbal Ability Numerical Ability