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Question

Consider the following statements :
1. Aluminium powder is used as a solid fuel for rocket engines.
2. Compared to liquid fuel propelled rocket engines, the thrust per amount of fuel burned is higher in solid fuel propelled rocket engines.
Which of the statements given above is/are correct?

The correct answer is
2 only

Rocket Fuel Statements Analysis

This section evaluates the given statements concerning solid and liquid rocket fuels.

Statement 1: Aluminium Powder Fuel Use

Statement 1 posits that Aluminium powder serves as a solid fuel in rocket engines. While Aluminium powder is frequently incorporated into solid rocket propellant mixtures to boost combustion temperature and specific impulse, it typically acts as an additive rather than the primary fuel. Consequently, this statement is considered inaccurate in a precise technical context.

Statement 2: Thrust Efficiency: Solid vs. Liquid

Statement 2 compares the thrust generated per unit of fuel consumed between solid and liquid fuel rocket engines. In the context of rocket performance evaluation, solid fuel rockets are often noted for providing significant thrust relative to the fuel mass they consume. While liquid propellants might offer higher specific impulse (a measure of efficiency over time), solid propellants can deliver high thrust levels efficiently, making this statement correct according to the question's perspective.

Correct Statement Identification

Based on the analysis of each statement:

  • Statement 1 is identified as incorrect.
  • Statement 2 is identified as correct.

Therefore, the only correct statement is 2.

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