Energy can neither be created nor destroyed but still everybody discuss about the energy crisis because
All of these
Energy can neither be created nor be destroyed but usable form is dissipated to surrounding in less usable farm which can’t be used again.
An ideal source of energy should have
All of these
These are the characterises of ideal source of energy.
Fossile fuels are
non-renewable source of energy
Fossile fuels were formed over million of years ago and there are only limited reserve. So they are non-renewable source of energy.
Dead organisms are transformed into petroleum and natural gas in
absence of air
Which of the following problem is associated with a burning of coal?
all of these.
Select the important factor for the site selection of a thermal power plant.
Availability’ of water
Water is required to produce steam. Thermal power plants are setup near the coal field and transmission of electricity is easy than transporting fuel.
Hydropower plant are located in the
Hydroelectric power plant are generally located in high hilly areas where dam can easily be buit and large reservoir for storage of water can be obtained.
Biogas is a better fuel than animal dung cake because
biogas bums smoke and leaves no residue
Biogas has high calorific value and leave no residue, no smoke after burning and can be used for domestic purpose, running engins and in gas lanterns for illumination.
Which of the following organism produces biogas from cow drug sherry in the biogas plant?
In the absence of oxygen, anaerobic micro-organism decomposed the compound of cow- dung sturry to generate biogas.
Wind is caused due to
All of these
All are the factors that responsible for the blowing of wind.
If 4 men and 6 boys can do a work in 8 days and 6 men and 4 boys can do the same work in 7 days, then how many days will 5 men and 4 boys take to do the same work?Watch Solution
If 18 men can cut a field in 35 days, then in how many days can 21 men cut the same field?Watch Solution
A, B, and C can complete a work in 40, 60, and 80 days respectively. They started working together. If A and B left 11 days and 8 days before the completion of work. In how many days they will complete the work.Watch Solution
If the operating cost of 6 burners for 6 hours in 8 days is Rs. 450 then find the number of burners if used for 5 hours for 10 day with operating cost of Rs.1250.Watch Solution
Pipes A and B can fill a tank in 4 hours and 6 hours 40 minutes, respectively; whereas a third pipe C can empty the full tank in 1 hours 40 minutes. A and B are opened at 2:00p.m. and 3:00 p.m., respectively and C is opened at 4:00 p.m. The tank will be completely empty at:Watch Solution