What is true of coal?
  • it is present in infinite quantity is earth
  • it a complex mixture of compounds of carbon,hydrogen and oxygen
  • peat coal has the highest percentage of carbon
  • anthracite has the lowest percentage of carbon
which is of these is incorrect?
  • charcoal is fuel which is obtained from wood. It mainly contain carbon
  • Biomass included cattle dung ,animal dung,agricultural waste
  • The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash
  • None of these
which of these is not fossil fuel?
  • Coal
  • petroleum
  • Natural gas
  • wood
Two statement are made Statement A: LPG mainly contain butane Statement B: CNG mainly contains methane Which of the below is correct option ?
  • A is correct only
  • B is correct only
  • A and B both are correct
  • A and B both are incorrect
Fuel used in thermal power plants is?
  • Fossil fuel
  • Biomass
  • water
  • Uranium
The condition for producing biogas is
  • water but not air
  • neither air nor water
  • air but not water
  • air and water
Electricity from the ocean can be generated based on utilizing
  • neither kinetic energy of the waves nor store thermal energy
  • The kinetic energy of the waves but not stored thermal energy
  • The kinetic energy of the waves as well as stored thermal energy
  • stored thermal energy but not kinetic energy of the waves
The purpose of the glass cover on top of a box-type solar cooker is to
  • allow one to see the food being cooked
  • allow more sunlight into the box
  • prevent dust from entering the box
  • reduce heat loss by radiation
Which energy is not derived from the sun?
  • Biomass energy
  • Wind energy
  • Ocean-wave energy
  • Nuclear energy
Geothermal energy is feasible in regions that
  • have coal mines
  • are near the sea
  • are over hot spots in the crust
  • have thermal plants
A solar panel is made by combining a large number of
  • solar cells
  • solar water heaters
  • solar cookers
  • solar concentrators
Which of the following is a renewable source of energy?
  • Wood
  • Natural Gas
  • Petroleum
  • coal
The site of a hydroelectric plant should be chosen carefully because it
  • produces a large amount of carbon monoxide and carbon dioxide
  • is expensive
  • produces a large amount of electricity
  • affects the organisms of the region
To work properly, wind-electric generators need wind speeds of at least about
  • 150 km/h
  • 15 km/h
  • 1500 km/h
  • 1.5 km/h
Which of the following is not biomass?
  • Rice Husk
  • Sun
  • Cattle Dung
  • Wood
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0