Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

Which of the following is considered as superior quality of coal ?

  1. Bituminous coal

  2. Peat

  3. Lignite

  4. Coke
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen. 

It is of higher quality than lignite coal but of poorer quality than anthracite.

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

Coal used in power plant is also known as -

  1. steam coal

  2. charcoal

  3. coke

  4. soft coal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

Pulverized coal is

  1. coal free from ash

  2. non-smoking coal

  3. coal which bums For long time

  4. coal broken into fine particles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

Which of the following enters the super heater of a boiler ?

  1. Cold water

  2. Hot water

  3. Wet steam

  4. Super-heated steam
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 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. 

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

As steam expands in turbine-

  1. its pressure increases

  2. its specific volume increases

  3. its boiling point increases

  4. its temperature increases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 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.

Multiple choice physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

The equipment installed in power plants to reduce air pollution due to smoke is

  1. Induced draft fans

  2. De-super heaters

  3. Electrostatic precipitators

  4. Re-heaters
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrostatic precipitators device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates and used to reduce air pollution due to smoke in power plants.