Renewable Energy Sources Mid - I, September - 2014

1.The distance between Sun and Earth
  • 120 million km
  • 150 million km
  • 140 million km
  • 170 million km
Answer: B
2.A photovoltaic cell converts
  • Mechanical energy into Electrical energy
  • Wind energy into electrical energy
  • Solar energy into electrical energy
  • Electrical energy into chemical energy
Answer: B
3.Thermal energy from solar pond is used to drive a _______heat engine
  • Carnot cycle
  • Joule cycle
  • Atkinson cycle
  • Rankine cycle
Answer: D
4.An efficient green house effect is possible only below____
  • 3000C
  • 4000C
  • 5000C
  • 7000C
Answer: C
5.Solar collectors used for home heating usually are ______
  • Flat plate collectors
  • Concentrating collectors
  • Focusing collectors
  • None
Answer: A
6.Fresnel lens collector is ________type of collectors
  • Line focusing
  • Point focusing
  • Flat plate collector
  • None
Answer: A
7.Irrigation is done by using which of the following solar applications
  • Solar Heating
  • Solar pumping
  • Solar Distillation
  • Solar Cooling
Answer: B
8.The refrigeration techniques used for solar cooling is
  • Vapour Compression
  • Absorption
  • Both a & b
  • None
Answer: C
9.The____ of a wind turbine is the ratio of the maximum power obtained from wind to the total power available in the wind.
  • Ideal efficiency
  • Maximum efficiency
  • Theoretical efficiency
  • All of the above
Answer: D
10.The speeds associated with the design of a windmill are
  • Cut-in speed
  • design speed
  • furling speed
  • All the above
Answer: D
11.Concentrating type collector is also called as ______________.
Answer: Focusing collectors
12.The duration of bright sunshine in a day is measured by means of a ______________
Answer: Sunshine recorder
13._____________ Collectors absorb both beam and diffused radiation.
Answer: Flat plate collectors
14.Two basic types of instruments used for measurement of solar radiation are _____________ and ______________
Answer: Pyrheliometer & Pyranometer
15.Differential heating of land and water causes ____________.
Answer: Local winds
16.______________is a device for collecting solar radiation and transfers the energy to a fluid passing in contact with it.
Answer: Solar Collector
17._______________is the maximum fraction of the power in a wind stream that can be extract.
Answer: Betz coefficient
18._______________convert energy in moving air to rotary mechanical energy.
Answer: Aeroturbines
19.The main disadvantage of wind energy is that it is ______________.
Answer: Unsteady (or) not Reliable
20.Energy conversion devices which are used to convert sunlight to electricity by the use of the photovoltaic effect are called ____________cells.
Answer: Solar