Practice Psychrometric Properties Of Air (5) - Psychrometry

Practise this section

10 questions

Flashcard drill
5 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does DBT stand for and what does it measure?
Show hintHide hint
Think about the standard thermometer.
Question 2.
What is Relative Humidity?
Show hintHide hint
Consider how much moisture air can hold at a given temperature.
3Question 3.
What does Relative Humidity indicate?
- The weight of dry air
- Moisture content relative to saturation
- Air temperature
Show hintHide hint
Think of it as a percentage of how full the air is with moisture.
4Question 4.
True or False: Dew Point Temperature is the same as Wet Bulb Temperature.
- True
- False
Show hintHide hint
Consider their definitions carefully.
Question 5.
Using a psychrometric chart, illustrate the process of cooling and dehumidifying air from a DBT of 30°C and RH of 60% to a target DBT of 20°C. Explain what changes occur.
Show hintHide hint
Track the curvature on your chart.
Question 6.
Calculate the enthalpy of air if you have a DBT of 25°C, a WBT of 20°C, and a humidity ratio of 0.008 kg/kg.
Show hintHide hint
Ensure you convert values properly first.

6 more questions in this section. Enroll free to practise them all.