Which of the following statements accurately describes vacuum pressure?

Question

Question

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RRB JE CBT 2 (Mechanical Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

Explanation:

Vacuum Pressure

Vacuum pressure is an important concept in the field of fluid mechanics and engineering. It refers to the pressure below the atmospheric pressure in a system. In a vacuum, the pressure is reduced to a level lower than the atmospheric pressure, which is considered as the reference point. Vacuum pressure is measured as the difference between the atmospheric pressure and the absolute pressure within the system. It is commonly expressed in units such as pascals (Pa), millimeters of mercury (mmHg), or inches of mercury (inHg).
Vacuum pressure can be created in a system by removing air or other gases using mechanical pumps or other methods. This is done to achieve various objectives, such as improving thermal insulation, enhancing the efficiency of certain processes, or creating a controlled environment for scientific experiments. Vacuum pressure is widely used in numerous industrial and scientific applications, including vacuum packaging, vacuum distillation, and vacuum chambers for testing materials and equipment.