GATE PI 2012 | Radiation Question 1 | Heat Transfer

GATE PI 2012

MCQ (Single Correct Answer)

-0.3

For an opaque surface, the absorptivity $$\left( \alpha \right),$$ transmissivity $$\left( \tau \right)$$ and reflectivity $$\left( \rho \right)$$ are related by the equation:

$$\alpha + \rho = \tau $$

$$\rho + \alpha + \tau = 0$$

$$\alpha + \rho = 1$$

$$\alpha + \rho = 0$$

GATE PI Subjects

Engineering Mechanics

Engineering Mechanics Static and Dynamics

Strength of Materials

Pure Bending Shear Force and Bending Moment Complex Stresses Simple Stress and Strain Deflection of Beams Thin Cylinders

Theory of Machines

Analysis of Plane Mechanisms Flywheel

Engineering Mathematics

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

Machine Design

Design For Static Loading Design of Spur Gears

Fluid Mechanics

Fluid Statics Laminar Flow Fluid Dynamics Turbulent Flow Fluid Kinematics

Heat Transfer

Fin Design and Transient Heat Conduction Conduction Radiation Heat Exchangers

Thermodynamics

Entropy and Irreversibility

Casting

Casting Process

Joining of Materials

Welding

Metal Forming

Sheet Metal Forming Processes Metal Forming Process

Machine Tools and Machining

Metal Cutting Advance Machine Tools Machining

Metrology

Metrology and Inspection

Industrial Engineering

Inventory Control Line Balancing Queuing Forecasting Pert and Cpm