Question
Download Solution PDFIf a point is to be at the free surface of a liquid open to the atmosphere, where the pressure is the atmospheric pressure Patm, then the gauge pressure at a depth ‘h’ from the free surface becomes:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Gauge pressure is the pressure relative to atmospheric pressure. When dealing with fluids, gauge pressure can be calculated using the depth of the fluid, the density of the fluid, and the acceleration due to gravity.
The pressure at a depth h in a fluid can be calculated using the formula:
Where:
- P is the absolute pressure at depth h.
- Patm is the atmospheric pressure.
- ρ is the density of the fluid.
- g is the acceleration due to gravity.
- h is the depth below the free surface.
However, gauge pressure ( P_{\text{gauge}} ) is defined as the absolute pressure minus the atmospheric pressure. Therefore, the gauge pressure at depth h is:
Substituting the expression for P :
Last updated on May 28, 2025
-> SSC JE ME Notification 2025 will be released on June 30.
-> The SSC JE Mechanical engineering application form will be available from June 30 to July 21.
-> SSC JE 2025 CBT 1 exam for Mechanical Engineering will be conducted from October 2 to 31.
-> SSC JE exam to recruit Junior Engineers in different disciplines under various departments of the Central Government.
-> The selection process of the candidates for the SSC Junior Engineer post consists of Paper I, Paper II, Document Verification, and Medical Examination.
-> Candidates who will get selected will get a salary range between Rs. 35,400/- to Rs. 1,12,400/-.
-> Candidates must refer to the SSC JE Previous Year Papers and SSC JE Civil Mock Test, SSC JE Electrical Mock Test, and SSC JE Mechanical Mock Test to understand the type of questions coming in the examination.