Which of the following is a disadvantage of the Pitot tube? 

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BDL MT Mechanical 16 April 2022 Official Paper
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  1. It is very difficult to install and remove
  2. It has no moving parts which helps in minimizing frictional losses
  3. It has low sensitivity
  4. It is very expensive

Answer (Detailed Solution Below)

Option 3 : It has low sensitivity
Free
ST 1: BDL MT Thermodynamics
20 Qs. 20 Marks 16 Mins

Detailed Solution

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Explanation:

Pitot Tube 

  • It is a device that is used to measure velocity at a particular point. 

Basic Principle: When we insert a pitot tube at any point

  • The velocity of flow at that point reduces to zero, which is called the stagnation point (No motion).
  • Kinetic Energy at that point is converted into Pressure Energy, and by measuring the pressure energy at this point, the velocity of flow can be calculated.

Pitot Tube advantages:

  • Pitot Tube is portable and does not contain any moving parts.
  • It is economical.
  • Permanent pressure loss is low.
  • Pitot tube can be easily installed on an existing system.

Pitot Tube disadvantages:

  • Foreign materials in a fluid can easily obstruct the pitot tube and disrupt normal reading.
  • Less accurate and less sensitive
  • Low range

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