Renewable Energy Resources MCQ Unit - 2
1. The efficiency of the solar cell is about
(A) 25 %
(B) 15 %
(C) 40 %
(D) 60 %
2. Direct Solar energy is used for
(A) Water heating
(B) Distillation
(C) Drying
(D) All of the above
3. Which radiation has a unique path ?
(A) Direct
(B) Diffuse
(C) Both
(D) None of above
4. What is the standard value of solar constant ?
(A) 1366 W/m^2
(B) 1367 W/m^2
(C) 1368 W/m^2
(D) 1370 W/m^2
5. The rate of incident energy per unit area of a surface is known as:
(A) Albedo
(B) Irradiance
(C) Zenith
(D) None of above
6. The zenith angle is the angle made by the sun’s rays with the _____ to a _____ surface.
(A) normal, horizontal
(B) tangent, horizontal
(C) normal, vertical
(D) tangent, vertical
7. Solar radiation flux is usually measured with the help of a
(A) Anemometer
(B) Pyranometer
(C) Sunshine recorder
(D) All of the above
8. Beam radiations are measured with
(A) Anemometer
(B) Pyrheliometer
(C) Sunshine recorder
(D) All of the above
9. The angle made by the plane surface with the horizontal is known as
(A) Latitude
(B) Slope
(C) Surface azimuth angle
(D) Declination
10. The angle made in the horizontal plane between the horizontal
line due south and the projection of the normal to the surface on the
horizontal plane is
(A) Hour angle
(B) Declination
(C) Surface azimuth angle
(D) Solar altitude angle
11. The hour angle is equivalent to
(A) 10° per hour
(B) 15° per hour
(C) 20° per hour
(D) 25° per hour
12. The complement of zenith angle is
(A) Solar altitude angle
(B) Surface azimuth angle
(C) Solar azimuth angle
(D) Slope
13. The following type of energy is stored as latent heat
(A) Thermal energy
(B) Chemical energy
(C) Electrical energy
(D) Mechanical energy
14. The power from the sun intercepted by the earth is approximately
(A) 1.8 x 10^(8) MW
(B) 1.8 x 10^(11) MW
(C) 1.8 x 10^(14) MW
(D) 1.8 x 10^(17) MW
15. In the paraboloid dish concept, the concentrator tracks the sun by rotating about
(A) One axes
(B) Two axes
(C) Three axes
(D) None of the above
16. Maximum efficiency is obtained in
(A) Flat plate collector
(B) Evacuated tube collector
(C) Line focussing collector
(D) Paraboloid dish collector
17. A liquid flat plate collector is usually held tilted in a fixed position, facing ___ if located in the northern hemisphere.
(A) North
(B) South
(C) East
(D) West
18. Surface azimuth angle varies from
(A) 0 to 90°
(B) -90 to 90°
(C) 0 to 180°
(D) -180° to 180°
19. What is unit of nuclear radiation?
(A)Reaumur
(B) Roentgen
(C) Rankine
(D) Pascal
20. HLW stands for ______.
(A) High and Low water
(B) High Level Waste
(C) Heated Low Level water
(D) High and Low Waste
21. Local Apparent Time or Local Solar Time is defined as
(A) Standard time - Equation of time correction ± 4(standard time longitude - longitude of location)
(B) Standard time + Equation of time correction + 4(standard time longitude - longitude of location)
(C) Standard time + Equation of time correction - 4(standard time longitude - longitude of location)
(D) Standard time + Equation of time correction ± 4(standard time longitude - longitude of location)
22. Solar cells,for power generation,entail the following major disadvantages
(A) Variable power
(B) High cost
(C) Lack of availability
(D) Large area requirement
23. Which type of absorber increases the heat transfer area over a simple flat plate absorber of the same capacity?
(A) Porous absorber plate
(B) Non-porous absorber plate
(C) Over lapped glass absorber
(D) Finned absorber
24. How is heat loss over come in liquid plate collectors?
(A) By insulation
(B) By casing
(C) By the transparent cover
(D) From provided tubes
25. Which part of flat plate collectors is coated in black?
(A) Transparent cover
(B) Absorber plate
(C) Insulation
(D) Fins
26. What are provided to minimize heat loss?
(A) Absorber plate
(B) Surface plate
(C) Insulation
(D) Casing
27. Temperature attained by cylindrical parabolic collector is of the order of
(A) 50 – 100°C
(B) 100 – 150°C
(C) 150 – 200°C
(D) 200 – 300°C
28. The function of a solar collector is of converting solar energy into
(A) Radiations
(B) Electrical energy directions
(C) Thermal energy
(D) All of these
29. Reflector mirrors used for exploiting the solar energy are called
(A) Mantle
(B) Heliostats
(C) Diffusers
(D) Ponds
30. A pyrenometer is used for the measurements of
(A) Diffuse radiations only
(B) Global radiations only
(C) Both global and diffused radiations
(D) None of the above
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