Solar Geometry and Insolation Symbols Quiz
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Questions and Answers

What symbol is used to represent insolation for a specified period?

  • G
  • T
  • I (correct)
  • H

What does the subscripts 'o', 'b', and 'd' represent in solar geometry?

  • Radiations at various latitudes
  • Extraterrestrial, beam, and diffuse radiations (correct)
  • Total radiations on a horizontal plane
  • Beam, direct, and tilted radiations

What is Radiosity in terms of solar geometry?

  • The radiation where radiant energy leaves a surface by reflection only
  • The rate at which radiant energy leaves a surface by emission only
  • The rate at which radiant energy is absorbed by a surface per unit area
  • The combined emission, reflection, and transmission of radiant energy from a surface (correct)

In solar geometry, what does the Latitude (Φ) represent?

<p>The vertical angle between a point's location and the equatorial plane (C)</p> Signup and view all the answers

How is the equivalent flux falling normal to a surface calculated in solar geometry?

<p>$I_b \cdot \cos\theta$ (C)</p> Signup and view all the answers

What does the Emissive Power represent in solar geometry?

<p>The radiation where radiant energy leaves a surface by emission only (A)</p> Signup and view all the answers

What is the Solar Azimuth Angle?

<p>The angle on a horizontal plane between the line due south and the projection of Sun's ray on the horizontal plane (A)</p> Signup and view all the answers

What does the Zenith angle represent?

<p>Incidence angle (B)</p> Signup and view all the answers

What is the range of the Surface Azimuth Angle (γ)?

<p>-180° to +180° (A)</p> Signup and view all the answers

How is the Hour Angle ω related to time?

<p>It is equivalent to 15° per hour (A)</p> Signup and view all the answers

What does the Slope (β) represent in Solar Geometry?

<p>The angle between the plane of the surface and the horizontal (C)</p> Signup and view all the answers

When is the Zenith angle negative according to the text?

<p>At sunrise (B)</p> Signup and view all the answers

What are the direct methods of solar energy applications?

<p>Photovoltaic and tidal (C)</p> Signup and view all the answers

Which region of the solar radiation spectrum is important for solar energy applications?

<p>Between 0.38 and 0.72 μm (A)</p> Signup and view all the answers

What is thermal radiation dependent on?

<p>Temperature characteristics of the emissive surface (D)</p> Signup and view all the answers

What is the speed of light in a vacuum?

<p>$300,000 m/s$ (A)</p> Signup and view all the answers

What is the solar constant value at the mean distance of the earth from the sun?

<p>$1366.1 W/m2$ (D)</p> Signup and view all the answers

When is the solar heat at the outer edge of the earth's atmosphere highest?

<p>January 3 (D)</p> Signup and view all the answers

What is the reflecting surface of a cylindrical parabolic collector generally made of?

<p>Silvered glass (A)</p> Signup and view all the answers

Why are organic heat transfer liquids used in cylindrical parabolic collectors?

<p>To reduce thermal conductivity (B)</p> Signup and view all the answers

What is an important consideration in the design of the supporting structure for a cylindrical parabolic collector?

<p>The shape and orientation of the reflecting surface (D)</p> Signup and view all the answers

In comparison to flat-plate collectors, what can be said about the number of manufacturers producing concentrating collectors globally?

<p>There are very few manufacturers producing concentrating collectors (A)</p> Signup and view all the answers

What is the primary function of Compound Parabolic Concentrators (CPCs)?

<p>To efficiently collect and concentrate distant light sources (D)</p> Signup and view all the answers

For what applications are Compound Parabolic Concentrators (CPCs) critical components?

<p>Wireless communication, biomedical, and defense research (C)</p> Signup and view all the answers

What is the purpose of the header pipes in a flat plate collector?

<p>To lead water in and out of the collector and distribute it to the tubes (C)</p> Signup and view all the answers

What is the recommended thickness range for the transparent cover of a flat plate collector?

<p>6 - 8 mm (C)</p> Signup and view all the answers

What material is commonly used for insulation in the bottom and sides of a flat plate collector?

<p>Glass wool (A)</p> Signup and view all the answers

What is the typical face area of collectors in a flat plate collector?

<p>2 m2 (D)</p> Signup and view all the answers

What is the main advantage of evacuated tube collectors over flat plate collectors?

<p>Evacuated tubes perform well even in low sunlight conditions (C)</p> Signup and view all the answers

What type of fluid typically circulates in the heat transfer system of evacuated tube collectors?

<p>Propylene Glycol (A)</p> Signup and view all the answers

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