Thermal | MCQs

Explanation

Railway tracks are made of steel, which expands in summer heat.

The gaps between rails allow space for this expansion, preventing the tracks from buckling or derailing trains.

Explanation

Jacobabad is called the thermal pole of Pakistan.

Jacobabad is one of the biggest cities of Pakistan.

Jacobabad is located in Sindh.

Explanation

Around 70% of the world's electricity is generated from thermal power plants, which use coal, natural gas, or oil to generate electricity.

This remains the dominant source of electricity worldwide despite the growing use of renewable energy.

Explanation

China's experimental nuclear fusion reactor, known as the "artificial sun,"

It has reportedly achieved temperatures

it has set a new world record after superheating a loop of plasma to temperatures five times hotter than the sun 

Explanation

dielectric, insulating material, or a very poor conductor of electric current. 

When dielectrics are placed in an electric field, practically no current flows in them because, unlike metals

Explanation

Major Sources of Electricity in Pakistan

Thermal: 60% share

Hydro: 30% share

Nuclear: 9% share

Renewables: 1% share

Major Sources of Electricity/Energy in the World

Oil & Gas: 53% share

Coal: 27% share

Renewables: 13% share

Nuclear: 7% share

Explanation

Three mutual conversions of energy forms occur at nuclear power plants:

nuclear energy is converted into thermal energy,

thermal energy is converted into mechanical energy,

and mechanical energy is converted into electric energy.

Explanation

Heat of vaporization is the amount of heat energy required to convert a substance from its liquid state to its gaseous state, without changing its temperature.

This energy is used to break the intermolecular forces between the molecules, allowing them to escape into the gas phase.

Explanation

Thermal power generation consists of using steam power 

Thermal energy sources are fossil fuels like:

natural gas, coal, and oil

as well as solar heat

heat pump electric heat

and geothermal heat.

Explanation

The correct preposition to use with "good" when referring to a skill or activity is "at."