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ENGINEERING, AE 2024 HSC 8 MC

The cross-section of a tapered tube is shown.
 

   

What are the pressure readings at both gauge and at gauge as the air flows through the tube?

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→ According to Bernoulli’s principle, as the air velocity increases through the tapered section, the pressure must decrease.

→ This results in high pressure at the wide entrance (gauge A) where velocity is low and low pressure at the narrow exit (gauge B) where velocity is high.

♦ Mean mark 46%.

ENGINEERING, AE 2019 HSC 10 MC

The diagram shows the airflow in a venturi.
 

What does this diagram illustrate?

  1. Coriolis effect
  2. Pascal's principle
  3. Dynamic pressure
  4. Bernoulli's principle
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→ Bernoulli’s principle states that the higher the pressure is, the lower the velocity will be.

→ This is illustrated in the diagram as it shows that there is a decreased pressure in the thinner, higher velocity section.


♦ Mean mark 55%.