The 'coolants' which can be used in the reactor of a nuclear power station are
liquid mercury and nitrogen dioxide
liquid sodium and carbon dioxide
liquid ammonia and carbon monoxide
liquid boron and uranium oxide
One atomic mass unit (u) is equivalent to an energy of
931 eV
9.31 MeV
1 MeV
931 MeV
The aviation fuel which is used in the engines of jet aeroplanes is :
diesel
kerosene
petrol
CNG
The source of energy of the sun is :
conversion of hydrogen gas into helium
conversion of carbon fuel into carbon dioxide
burning of hydrogen gas present in the sun
disintegration of uranium into barium and krypton
Which of the following substance can be used to construct a solar cell ?
Silicon
Germanium
Silver
Platinum
A good fuel is one which possesses
high calorific value and low ignition temperature
high calorific value and high ignition temperature
high calorific value and moderate ignition temperature
low calorific value and moderate ignition temperature
LPG consists mainly of
butane
ethane
butanone
methane
The system or device which converts radiant energy of the sun directly into electric energy
Solar cell
Solar cooker
Tidal power plant
Thermal power plant
The fuel which is not used at thermal power plants is :
coal
uranium
natural gas
fuel oil
Which of the following is not a fossil source of energy?
kerosene oil
cow-dung cakes