Sources of Energy Test

Result

Sources of Energy Test - 33

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Weekly Quiz Competition

Question 1
1 / -0

The temperature difference required up to a water level difference of $$1000 \,m$$ for operating an OTEC system is:

A
$$20^o C$$

B
$$15^o C$$

C
$$25^o C$$

D
$$10^o C$$

Solution

Water present at the surface of sea is continuously being heated due to sunlight but. the water present in the deep-sea level is quite cold because sunlight is unable to penetrate deep into the water. So. this difference in the different levels of water in the sea can be utilised efficiently to create electricity. A plant where electricity is created from this source is called as OTEC-ocean thermal energy conversion plant. The minimum temperature difference required for an OTEC to function is $$20^o C$$.
Question 2
1 / -0

Ocean thermal energy is due to:

A
Energy stored by waves in the ocean

B
Temperature difference at different levels in the ocean

C
Pressure difference at different levels in the ocean

D
Tides arising out in the ocean

Solution

The water at the surface of the sea or ocean is heated by the Sun while the water in deeper sections is relatively cold. This difference in temperature is exploited to obtain energy in ocean-thermal-energy conversion plants. These plants can operate if the temperature difference between the water at the surface and water at depths up to $$2\ km$$ is $$20\ K (20^\circ \ C)$$ or more. The warm surface-water is used to boil a volatile liquid like ammonia. The vapours of the liquid are then used to run the turbine of generator. The cold water from the depth of the ocean is pumped up and condense vapour again to liquid.
Question 3
1 / -0

Choose the incorrect statement

A
We are encouraged to plant more trees so as to ensure a clean environment and also provide bio-mass fuel

B
Gobar-gas is produced when crops, vegetable wastes, etc., decompose in the absence of oxygen.

C
The Main Ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash

D
Bio-mass is a renewable source of energy

Solution

The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash. Biomass is a renewable source of energy. The main ingredient of biogas is methane (up to $$75\ %$$) and it burns without smoke and leaves no ash.
Question 4
1 / -0

Which method is used to produce electricity in thermal power plant?

A
By heating chargeable cells

B
By boiling water to produce steam

C
By pushing pistons by heat energy

D
Any of the above

Solution

In thermal Power Plant, a large amount of fossil fuels are burnt every day in power stations to heat up water to produce steam which further runs the turbine to generate electricity. The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Therefore, many thermal power plants are set up near coal or oil fields. The term thermal power plant is used since fuel is burnt to produce heat energy which is converted into electrical energy.
Question 5
1 / -0

What type of energy is used to run submarine?

A
Wind energy

B
Ocean energy

C
Atomic energy

D
None of these

Solution

Atomic energy is used to run submarine. Atomic energy comes from nuclear reactors that use nuclear fission.
Question 6
1 / -0

Which method is used to produce electricity in hydro electric power plant?

A
By boiling the water to produce steam

B
By ionizing water

C
By running dynamo the kinetic energy of water

D
By running dynamo the potential energy of water

Solution

By running dynamo, the kinetic energy of water is used to produce electricity in hydro electric power plant.
Question 7
1 / -0

Which nuclear reaction takes place in an atom bomb?

A
Nuclear fission

B
Nuclear fusion

C
Radioactivity

D
Combustion

Solution

In an atom bomb, nuclear fission reaction takes place. In this type of reaction, the nucleus of an atom splits into two or more smaller nuclei. One reaction induces a series of chain reactions and a very large amount of energy is released in this process.
Question 8
1 / -0

Bio-mass is a __________ source of energy.

A
Renewable

B
Non-Renewable

C
Both

D
None

Solution

Bio-mass is plant and animal material used as fuel. Therefore, bio-mass is a renewable source of energy.
Question 9
1 / -0

When a log of wood burns, it converts _____ energy to heat energy.

A
Chemical

B
Mechanical

C
Electrical

D
Nuclear

Solution
Question 10
1 / -0

Electric heater converts:

A
Heat energy into electrical energy

B
Chemical energy into electrical energy

C
Electrical energy into Heat energy

D
Electrical energy into Chemical energy

Solution

The energy supplied to the circuit by the source gets dissipated in the resistor as heat. The electric heater is based on the heating effect of current. Electric heater converts electrical energy into heat energy.

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Re-Attempt Weekly Quiz Competition

Sources of Energy Test - 33

Result

Sources of Energy Test - 33

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SHARING IS CARING

Question 1

$$20^o C$$

$$15^o C$$

$$25^o C$$

$$10^o C$$

Solution

Question 2

Energy stored by waves in the ocean

Temperature difference at different levels in the ocean

Pressure difference at different levels in the ocean

Tides arising out in the ocean

Solution

Question 3

We are encouraged to plant more trees so as to ensure a clean environment and also provide bio-mass fuel

Gobar-gas is produced when crops, vegetable wastes, etc., decompose in the absence of oxygen.

The Main Ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash

Bio-mass is a renewable source of energy

Solution

Question 4

By heating chargeable cells

By boiling water to produce steam

By pushing pistons by heat energy

Any of the above

Solution

Question 5

Wind energy

Ocean energy

Atomic energy

None of these

Solution

Question 6

By boiling the water to produce steam

By ionizing water

By running dynamo the kinetic energy of water

By running dynamo the potential energy of water

Solution

Question 7

Nuclear fission

Nuclear fusion

Radioactivity

Combustion

Solution

Question 8

Renewable

Non-Renewable

Both

None

Solution

Question 9

Chemical

Mechanical

Electrical

Nuclear

Solution

Question 10

Heat energy into electrical energy

Chemical energy into electrical energy

Electrical energy into Heat energy

Electrical energy into Chemical energy

Solution

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