Renewable Energy Sources Mid - I, September - 2014

1._________is a Solar Air Heater
  • Typical liquid collector
  • Typical air collectorc
  • Heat transport system
  • None
Answer: B
2.__________ is used to measure the brightness of the sun
  • sunshine Recorder
  • Pyrheliometer
  • Pyronometer
  • None of the above
Answer: A
3.Flat plate collectors also called as _______________ collectors
  • Non-concentrating
  • Concentrating
  • Focusing
  • both A and B
Answer: A
4.The absorber located at focus of Point Focusing Collector is made of
  • Copper-steel
  • Aluminium-copper
  • Zirconium-copper
  • None
Answer: C
5.Pebble bed storage is the ________________ type of solar energy storage
  • Mechanical
  • Electrical
  • Chemical
  • Thermal
Answer: D
6.The main disadvantage of Solar Furnace is
  • High cost
  • Rapid heating & cooling
  • Extremely high temp
  • Contamination
Answer: A
7.Darries type rotor mill is used for ___________
  • low velocity
  • high velocity
  • medium velocity
  • both B &C
Answer: B
8.In horizontal axis wind mill two blades are taken as same length to reduce the
  • Speed
  • Cost
  • Weight
  • Vibration
Answer: D
9.Units for solar radiations _____________
  • cal/cm2/day
  • cal/mtrs
  • langleys
  • both A&B
Answer: D
10._____________ is the non-conventional source of energy
  • Natural gas
  • Petrol
  • Solar
  • Coal
Answer: C
11.The turnable mirrors which are used for collecting solar energy are called ___________.
Answer: Heliostats.
12._________ instrument is used to measure the total radiation
Answer: Pyronometer.
13.Concentration ratio is high in case of ____________ collectors
Answer: Parabolic collectors.
14._____________ type of collectors requires orientation towards the sun.
Answer: Concentrated.
15.____________ is used to convert solar energy directly into electrical energy.
Answer: Solar photovoltaic cell.
16.The energy in the wind is ____________ form of energy.
Answer: Kinetic.
17.Savonius and darries wind mills are _________________type of wind mills.
Answer: Vertical axis wind mills.
18.For electric power generation and water pumping ___________________ type of wind mills
are mostly used.
Answer: Horizontal axis.
19.Combination of solar cells (Photo-voltaic cells) designed to increase the electric power
output is called a ____________.
Answer: Solar Module (or) Solar Array
20.Wind energy conversion devices are commonly known as ___________.
Answer: Wind turbines