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WorksheetsSOLAR TECHNICIAN
Total questions: 25
Worksheet time: 25mins
Direct Solar energy is used for
Water heating
Distillation
Drying
All of above
The following is indirect method of solar energy utilization.
Wind energy
Biomass energy
Wave energy
All of the above
A liquid flat plate collector is usually held tilted in a position, facing ........................... if located in the northern hemisphere.
North
South
East
West
The collection efficiency of flat plate collector can be improve by.
Putting a selective on the plate
Evacuating the space above the absorber plate
Both (a) and (b)
None of the above
The efficiency of various type of collectors....................... with ..................... temperature.
Increase, decreasing`
decreases, increasing
remains same, increasing
depends upon type of collector
Maximum efficiency is obtained
Flat plate collector
Evacuated tube collector
Line focussing collector
Paraboloid dish collector
The following type of energy is stored as latent heat
Thermal energy
Chemical energy
Electrical energy
Mechanical energy
Which of the following type of collector is used for low temperature system?
Flat plate collector
Line focussing parabolic collector
Paraboloid dish collector
All of the above
The sun subtends an angle of .......................... minutes at the earth"s surface.
22
32
42
52
The value of solar Constant is
1347 W/m2
1357 W/m2
1367 W/m2
1377 W/m2
Global radiation =
Direct radiation - Diffuse Radiation
Direct radiation + Diffuse Radiation
Direct radiation / Diffuse radiation
Diffuse radiation / Direct radiation
Solar radiation flux is usually measured with the help of a.
Anemometer
Pyranometer
Sunshine recorder
All of the above
Beam radiations are measured with.
Anemometer
Pyrheliometer
Sunshine recorder
All of the above
Surface azimuth angle varies from
0 to 90 deg
-90 to 90 deg
0 to 180 deg
-180 deg to 180 deg
The hour angle is equivalent to
10 deg per hour
15 deg per houre
20 per hour
25 deg per hour
............................ photo voltaic devices in the form of thin films.
Cadmium Telluride
Cadmium oxide
Cadmium sulphide
Cadmium sulphate
The amount of photo generated current increases slightly with an increase in
Temperature
Photons
Diode current
Shunt current
When the source of light is not sun light then the photo voltaic cell is used as
Photo diode
Photo voltaic cell
Photo detector
Photo transmitter
What is the difference between Photodiode and solar cell ?
No External Bias in Photodiode
No External Bias in solar cell
Larger surface area in photodiode
No difference
What should be the band gap of the semiconductor to be as solar cell materials ?
0.5 eV
1.0 eV
1.5 eV
1.9 eV
Advantage of solar panels.
Dependent of sunlight
Initial cost is high
Sunlight - free of cost
Manufacturing is very complicated process
Disadvantages of solar panel.
Minimum Maintenance
Pollution free
Independent working
Dependent on sunlight
Solar cell is made of ..
Silicon
Polycrystalline
Amorphous Silicon
All of above
How many cells are connected in series to form a standard module ?
16
28
32
36
The earth resistance shall not be more then.
5 Ohm
3 Ohm
2 Ohm
1 Ohm
