Which one of the following types of coal has highest amount of carbon and burns without smoke?
Anthracite
Bituminous coal
Lignite
Peat
The mixed minerals are known as :
salts
compounds
sands
ores
Give an example of shafts:
Surface mining
Deep bores
Off - shore drilling
Space shafts
What is smelting?
It is the process of smelling any object
It is a process of separating metals from their ores by the use of heat
It is boiling of liquids
All of them
Which one of the following trapped from the Sun can be used in solar cells to produce electricity?
Solar energy
Wind energy
Nuclear power
Hydroelectric power
Which one of the following is found with petroleum deposits and released when crude oil is brought to the surface?
Natural gas
Copper
Tin
Coal
A hard,black and compact coal is:
Bituminous
Sederite
Name the process in which deep wells are bored to take out petroleum and natural gas?
Quarrying
Drilling
Shaft mining
Open cast mining
What are the Westerlies?
Permanent winds
Seasonal winds
Local winds
Variable winds
Where does mineral fuel find?
Sedimentary rocks
Metamorphic rocks
Igneous rocks
None of these
