Fill the blanks by LPG : Butane, CNG :
ethane
methane
propane
The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :
15 km/h
25 km/h
35 km/h
45 km/h
The product of petroleum used to drive heavy vehicles like trucks is :
petrol
kerosene
diesel
petroleum gas
The efficiency of the solar cooker can be increased by using ___with it.
an absorber
a refractor
a reflector
an insulator
The energy produced inside the Sun is due to
electron transition
fission
Fusion
none of these
____are devices which work on wind.
windmills
solar panel
nuclear power plant
Coal is a _________ source of energy.
non renewable
renewable
atomic
thermal
The main constituent present in LPG(cooking gas) is
butane
benzene
The constituents contained in petroleum are separated by subjecting to a process called
Batch distillation
Steam distillation
Fractional distillation
Extractive distillation
