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# Solar Energy Basics

Created by
@CharmingFriendship

### Which angle is defined as the angular position of the Sun at solar noon with respect to the plane of the equator?

• Declination Angle (correct)
• Longitude
• Zenith Angle
• Latitude
• ### What is the angular distance between a point on any meridian and the prime meridian at Greenwich?

• Inclination Angle
• Declination Angle
• Latitude
• Longitude (correct)
• ### What is the range of values for the Declination Angle according to the provided text?

• -180° ≤ δ ≤ 180°
• -90° ≤ δ ≤ 90°
• -45° ≤ δ ≤ 45°
• -23.45° ≤ δ ≤ 23.45° (correct)
• ### Which angle is known as the angle between Sun’s ray and its projection on a horizontal surface?

<p>Inclination Angle</p> Signup and view all the answers

### At what value is the Inclination Angle equal to at sunrise and sunset based on the text?

<p>$0°$</p> Signup and view all the answers

### What does the Zenith Angle represent?

<p>Angle between Sun’s ray and horizontal plane's perpendicular</p> Signup and view all the answers

### What is the key advantage of a passive thermosiphon solar water heater over an active solar water heating system?

<p>It requires less equipment and is easier to install</p> Signup and view all the answers

### What is the main disadvantage of a passive thermosiphon solar water heater compared to an active system?

<p>It is less efficient at heating water</p> Signup and view all the answers

### Which of the following is NOT a characteristic of an active solar water heating system?

<p>Requires a large storage tank</p> Signup and view all the answers

### What is the purpose of the on-off controller in an active solar water heating system?

<p>To turn the pump on and off based on the temperature difference</p> Signup and view all the answers

### How do active solar water heating systems typically differ from passive thermosiphon systems in terms of water heating capacity?

<p>Active systems can heat a larger volume of water</p> Signup and view all the answers

### Which type of building or facility is BEST suited for an active solar water heating system?

<p>Factories, hospitals, hotels, and offices</p> Signup and view all the answers

### What is the approximate distance between the Sun and the Earth?

<p>$1.5 \times 10^8$ km</p> Signup and view all the answers

### What is the typical range of solar radiation flux available on the Earth's surface?

<p>Rarely exceeds 1 kW/m^2</p> Signup and view all the answers

### What is the main challenge in utilizing solar energy?

<p>The real challenge is of an economic nature</p> Signup and view all the answers

### What is the term used to refer to the incident solar energy per unit area on a surface over a day?

<p>Insolation</p> Signup and view all the answers

### What is the symbol used to represent solar irradiance?

<p>G</p> Signup and view all the answers

### What is the typical diameter range of the evacuated tubes used in evacuated tube collectors?

<p>1&quot; (25 mm) to 3&quot; (75 mm)</p> Signup and view all the answers

### What type of glass are the evacuated tubes typically made of?

<p>Borosilicate or soda lime glass</p> Signup and view all the answers

### What is the primary function of the selective coating on the fins inside the evacuated tubes?

<p>To transfer heat to the fluid circulating through the pipe</p> Signup and view all the answers

### What is the typical operating temperature range of a concentrating solar collector?

<p>100 - 400C or above</p> Signup and view all the answers

### What is the primary mechanism by which the heat is transferred from the evacuated tubes to the manifold in the header tank?

<p>Convection within the heat transfer fluid in the heat pipe</p> Signup and view all the answers

### What is the primary purpose of the evacuated space between the inner and outer glass tubes in an evacuated tube collector?

<p>To reduce heat loss from the inner tube</p> Signup and view all the answers

### What is the primary purpose of the supporting structure in a cylindrical parabolic collector?

<p>To facilitate the movement and orientation of the reflecting surface</p> Signup and view all the answers

### Which statement about the heat transfer fluid used in cylindrical parabolic collectors is true?

<p>They are called thermic fluids and are organic heat transfer liquids.</p> Signup and view all the answers

### What is the primary function of a Compound Parabolic Concentrator (CPC)?

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

### What is the typical reflecting surface material used in cylindrical parabolic collectors?

<p>Curved back silvered glass</p> Signup and view all the answers

### Which statement about the production of cylindrical parabolic collectors is true?

<p>There are very few manufacturers worldwide, and the production volume is low.</p> Signup and view all the answers

### What is the typical acceptance angle range for Compound Parabolic Concentrators (CPCs)?

<p>25° to 45°</p> Signup and view all the answers

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