Propellants

Q.

A rocket works on the principle of

Q.

How many types of engines are there?

Q.

On which laws is the principle of rocket propulsion based?

Q. Which of the following is not used as a propellant in rockets?

1. Ethyl alcohol
2. Poly butadienes
3. Coal
4. Liquid hydrogen

Q.

Supercharging is the process of

1. Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere

2. Providing forced cooling air

3. Injecting excess fuel for raising more loads

4. Supplying compressed air to remove combustion products fully

Q.

How is air pollution caused by burning fossil fuels?

Q. Which rocket propellants do not require an external combustion initiator?

1. Liquid propellant
2. Solid propellant
3. Gas propellant
4. Cryogenic propellant

Q.

Write ‘True’ or ‘False’ for the following statements.

Liquid oxygen is used for burning fuel in spaceships.

1. True
2. False

Q.

20. ________ is used for burning fuel in rockets and space ships.

Q. The principle of rocket propulsion depends on :

1. Newton's third law of motion
2. Principle of conservation of momentum
3. Either A and B
4. Both A and B

Q. Draw the diagram of a single stage rocket and label the parts.

Q.

Electricity can be used to replace the fuel and power a rocket (using today's mechanism) just like an electric car?

1. False, as Electricity is not a source of energy

2. False, as the rocket needs to throw out fuel in the opposite direction to move.

3. True, as Electricity is also a form of energy

4. True, as mechanism for car and rocket is similar.

Q. Which type of rocket fuels are already combined to the oxidizer in the combustion chaber?

1. Solid fuel
2. Liquid fuel
3. Cryogenic fuel
4. Gas fuel

Q. A propellant in rocket undergoes:

1. Combustion
2. Reduction
3. Propulsion
4. Electrolysis

Q. Why rockets have to carry oxidizer along with the fuel?

Q. Blow a balloon and let it go. You will find it moving in the direction opposite to the direction in which the air is ejected. This demonstrates :

1. the principle of combustion
2. the principle of conservation of energy
3. the principle of rocket propulsion
4. None of the above

Q.

What is meant by the environmental consequences of using a particular source of energy?

Q. The propulsion of a rocket is based on the principle of conservation of

1. linear momentum
2. energy
3. angular momentum
4. mass