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MPSC State Service 2018 · GS · Question 40 of 99

A steam engine delivers 5.4 × 10⁸ J of work per minute by taking 3.6 × 10⁹ J of heat from its source. What is the efficiency of the engine?

Physics

  1. A15%Correct
  2. B12.5%
  3. C85%
  4. D87.5%

Answer: A. 15%

Explanation

Efficiency = work output / heat input = 5.4×10⁸ / 3.6×10⁹ = 0.15 = 15%.

Source: MPSC Rajyaseva Prelims 2018 GS Paper I (official paper)

← Q39View full paper (99 questions)Q41 →

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