Tag: renewable and non-renewable resources
Questions Related to renewable and non-renewable resources
What are hot spots?
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Molten rock in the earths crust is pushed upward and trapped in certain regions
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Solid rock in the earths crust is pushed upward and trapped in certain regions
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Molten rock in the earths crust is pushed downward and trapped in certain regions
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Solid rock in the earths crust is trapped in certain regions
Out of the following which one is not a unconventional source of energy ?
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Tidal power
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Geothermal energy
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Nuclear energy
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Wind power
Live storage of coal in a power plant means
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coal ready for combustion
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preheated coal
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storage of coal sufficient to meet 24 hour demand of the plant
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coal in transit
Live storage of coal in power plants means sufficient storage of coal to meet 24 hour demand of the plant.
Water gas is a mixture of -
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$CO _2 and O _2$
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$O _2and H _2$
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$H _2, N _2 and O _2$
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$CO, N _2 and H _2$
Water gas is produced from synthesis gas, which is composed of carbon monoxide and hydrogen
Which of the following is considered as superior quality of coal ?
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Bituminous coal
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Peat
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Lignite
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Coke
Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen.
Coal used in power plant is also known as -
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steam coal
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charcoal
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coke
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soft coal
Steam coal also known as thermal coal, is used in power stations to generate electricity. Coal is first milled to a fine powder, which increases the surface area and allows it to burn more quickly
Pulverized coal is
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coal free from ash
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non-smoking coal
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coal which bums For long time
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coal broken into fine particles
A Pulverized coal fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the firebox
Which of the following enters the super heater of a boiler ?
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Cold water
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Hot water
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Wet steam
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Super-heated steam
A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Therefore, wet streams enters the super heater of a boiler.
The efficiency of a thermal power plant improves with
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increased quantity of coal burnt
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larger quantity of water used
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lower load in the plant
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use of high steam pressures
The efficiency of a thermal power plant improves with use of high steam pressures.
As steam expands in turbine-
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its pressure increases
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its specific volume increases
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its boiling point increases
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its temperature increases
Specific volume is defined as the number of cubic meters occupied by one kilogram of a particular substance. When steam expands its volume increases hence its specific volume increases.