Which unit is used to express pressure in the examples?

Which unit is used to express pressure in the examples?

• A. bar
• B. Pa
• C. N/mm^2
• D. psi

Answer: (D)

Pressure can be shown in several units, but the examples use pounds per square inch because imperial units are common in many pneumatic contexts. Gauges, regulators, and compressors in everyday pneumatic work often display pressure in psi, making the readings quick to interpret for technicians working with typical system ranges (tens to a few hundred psi). If you needed metric equivalents, you’d convert: 1 bar is about 14.5 psi, and 1 MPa is about 145 psi. So the psi unit aligns with the standard practice in the material, which is why it’s the unit used in the examples.

Pressure can be shown in several units, but the examples use pounds per square inch because imperial units are common in many pneumatic contexts. Gauges, regulators, and compressors in everyday pneumatic work often display pressure in psi, making the readings quick to interpret for technicians working with typical system ranges (tens to a few hundred psi). If you needed metric equivalents, you’d convert: 1 bar is about 14.5 psi, and 1 MPa is about 145 psi. So the psi unit aligns with the standard practice in the material, which is why it’s the unit used in the examples.