Which value lists the standard atmospheric pressure at sea level in psi?

Which value lists the standard atmospheric pressure at sea level in psi?

• A. 9.8 psi
• B. 14.7 psi
• C. 5.2 psi
• D. 21.0 psi

Answer: (B)

Knowing the standard atmospheric pressure at sea level and its psi value is essential when interpreting pressure readings. Standard atmosphere is defined as 1 atm, which equals about 101.3 kPa and converts to 14.7 psi. This 14.7 psi is the reference point used in hazmat and related fields for pressures at sea level. The option that matches this standard is 14.7 psi. The other values are not the sea-level standard; they represent pressures either below or above one atmosphere and do not equal the reference pressure. If you encounter gauge pressure, remember it’s measured relative to ambient atmospheric pressure, which can change the numeric value.

Knowing the standard atmospheric pressure at sea level and its psi value is essential when interpreting pressure readings. Standard atmosphere is defined as 1 atm, which equals about 101.3 kPa and converts to 14.7 psi. This 14.7 psi is the reference point used in hazmat and related fields for pressures at sea level. The option that matches this standard is 14.7 psi. The other values are not the sea-level standard; they represent pressures either below or above one atmosphere and do not equal the reference pressure. If you encounter gauge pressure, remember it’s measured relative to ambient atmospheric pressure, which can change the numeric value.