Chapter 14 – Sources of Energy – Ankit Books

Assertion: Fuel has to be burnt to obtain heat energy.
Reason: The minimum temperature to which a fuel must be heated so that it may catch fire and start burning is known as ignition temperature.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Assertion: The major constituent of biogas is methane.
Reason: Biogas is produced by the aerobic degradation by animal wastes like cow ding in the presence of water.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Biogas is formed in the

(a) presence of air only
(b) presence of water only
(c) absence of air only
(d) presence of water and absence of air

Biogas is a better fuel than animal dung cake because

(a) biogas has lower calorific value.
(b) animal dung cake has high calorific value
(c) biogas bums smoke and leaves no residue
(d) biogas is used as a fuel for cooking only wheareas dung cake can be used for cooking, illuminant the lanterns.

Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?

(a) geothermal energy
(b) wind energy
(c) nuclear energy
(d) bio-mass

The working fluid in ocean thermal power plant is

(a) Volatile liquid like ammonia
(b) petrol
(c) charcoal
(d) liquified petroleum gas

Ocean thermal energy is produced due to

(a) pressure difference at different levels in the ocean.
(b) temperature difference at different levels in the ocean.
(c) energy stored by waves in the ocean.
(d) tides rising out of the ocean.

A device in which electricity is produced by the process of controlled nuclear fission reaction is called

(a) nuclear chain reaction
(b) hydel power plant
(c) nuclear reactor
(d) thermal power plant

India exploded her first underground nuclear device at

(a) Ranchi
(b) Kota
(c) Jaipur
(d) Pokhran

Fusion reaction is also known as

(a) chemical reaction
(b) elastic scattering
(c) thermonuclear reaction
(d) photo nuclear reaction

A good fuel should possess

(a) high ignition temperature
(b) moderate ignition temperature
(c) high calorific value
(d) both high calorific value and moderate ignition temperature

Geothermal energy is

(a) Heat energy in the interior of earth
(b) energy of molten mars exists in the farm of magma inside the earth.
(c) molten lava on the surface of earth
(d) energy obtained from solar thermal electric plants

Tidal energy is harnessed by constructing a dam across

(a) narrow opening to the sea
(b) wide opening to the sea
(c) the river in hilly trains
(d) the river in plane areas

The variety of coal which has the highest car-bon content

(a) Anthracite
(b) Peat
(c) Bituminous
(d) Lignite

Dead organisms are transformed into petroleum and natural gas in

(a) presence of air
(b) absence of air
(c) presence of sunlight
(d) none of the above

Which of the following is not a bio mass energy source?

(a) gobar gas
(b) coal
(c) wood
(d) nuclear energy

The main constituent of CNG is

(a) butane
(b) methane
(c) ethane
(d) propane

Hydropower plant are located in the

(a) desert area
(b) plane area
(c) hilly terrains
(d) None of the above

The use of reflector in the solar cooker is to

(a) Decrease efficiency
(b) create green house effect
(c) increase efficiency
(d) None of the above

Solar cells are made of

(a) metals
(b) insulator
(c) semi conductors
(d) None of these

A solar cooker may not cook food if.

(a) Interior of the box and the container of food are perfectly shining.
(b) Glass sheet over the box is not closed.
(c) Solar cooker is placed in the shade.
(d) All the above

Which of the following problem is associated with a burning of coal?

(а) Carbon-dioxide emission
(b) acid rain
(c) ash with toxic metal supurity
(d) All of the above

Assertion: Wind energy farms cannot be established every where.
Reason: The wind energy farms can be established only at those places where wind blows for most part of the year.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Assertion: Coke is a better fuel than coal.
Reason: Burning of coke cause air pollution.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Unit of calorific value of a substance is

(a) Kcal
(b) Joules
(c) J kg
(d) J/kg

The material used for interconnection the solar cells in the solar panel is

(a) silicon
(b) silver
(c) aluminium
(d) copper

A solar panel is made by combining in an arrangement

(a) solar concentrator
(b) solar cookers
(c) solar cells
(d) solar chimney

Tidal energy is a farm of energy obtained from the

(a) motion of surface water in ponds
(b) ocean in the form of tidal waves
(c) tides occurs in the river water
(d) motion of the wave in sea

One major problem in harnessing nuclear energy is

(a) converting nuclear energy into electrical energy.
(b) sustaining the reaction.
(c) splitting the nuclei.
(d) disposing off spent fuel easily.

Which of the following is not an example of a bio-mass energy?

(a) wood
(b) gobar-gas
(c) nuclear energy
(d) coal

Chapter 14 – Sources of Energy

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