Jump to main content.

Module 1: Basic Concepts - Pressure - Practice Problems

 
Features
Instructions:
Work these problems on a sheet of paper and check your answers against those provided below.

Helpful Calculators:
The following calculator may be useful in solving these problems. You can access this either from the "Calculators" button on the screen or from the link below.

Pressure Converter

break line

Q icon #1
What is the absolute pressure if the relative pressure indicator on the air pollution control device indicates -25 in. W.C.? Assume standard conditions (68°F and 1 ATM). See "Conversion Factors" or Table 1 (Units of Pressure).
A icon
Answer: 382 in. W.C.

Solution:
Practice equation 1

break line

Q icon #2
What is the absolute pressure if the relative pressure indicator on the air pollution control device indicates -25 in. W.C.? Assume that the barometric pressure is 30.2 in. Hg. See "Conversion Factors" or Table 1 (Units of Pressure).
A icon
Answer: 385.8 in. W.C.

Solution:
  1. Using Table 1, convert the barometric pressure value to inches of water.
    Practice equation 2(1)

  2. Calculate the absolute pressure.
    Practice equation 2(2)

break line

Q icon #3
A gas stream in a stack has a pressure of +2 in. W.C. What is its absolute pressure expressed in inches Hg? Use a barometric pressure value of 29.3 in. Hg in this calculation. See "Conversion Factors" or Table 1 (Units of Pressure).
A icon
Answer: 29.45 in. Hg

Solution:
  1. Using Table 1, convert the relative pressure value to units of in. Hg.
    Practice equation 3(1)

  2. Calculate the absolute pressure.
    Practice equation 3(2)

break line

Return To Lesson
Pressure
Next Lesson
Moles

APTI Virtual Classroom

Local Navigation

Jump to main content.