Engineering Board Exam Reviewer · Thermodynamics · easy

A nozzle is a device that:

  1. Increases the pressure of a fluid at the expense of velocity
  2. Produces shaft work
  3. Increases the velocity of a fluid at the expense of pressure
  4. Increases the temperature of a fluid by adding heat

Answer

C. Increases the velocity of a fluid at the expense of pressure

Solution

In a nozzle, enthalpy (pressure) drop is converted into kinetic energy. A diffuser does the opposite.

More Thermodynamics questions

  1. For a polytropic process PVn = C, which value of n corresponds to an isothermal process of an ideal gas?
  2. On a T–s diagram, the area under a reversible process curve represents:
  3. The Mollier diagram is a plot of:
  4. As the pressure on water increases, its saturation (boiling) temperature:
  5. Steam whose temperature is higher than the saturation temperature corresponding to its pressure is called:
  6. The SI unit of thermal conductivity is:
  7. The value of the Stefan–Boltzmann constant is approximately:
  8. Heat transfer by convection is governed by:
  9. On a psychrometric chart, sensible heating or cooling of air is represented by a:
  10. Relative humidity is defined as the ratio of:

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