Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
What should the temperature of the vacuum chamber be?
What should the temperature of the vacuum chamber be?
- 17°C
- 20°C (correct)
- 23°C
- 27°C
How long should the water tank be kept at the given temperature?
How long should the water tank be kept at the given temperature?
- 10 hours
- 12 hours
- 24 hours
- 2 hours (correct)
What is the maximum difference between two weighings, 24 hours apart, for the dry specimen to be considered in a state of constant mass?
What is the maximum difference between two weighings, 24 hours apart, for the dry specimen to be considered in a state of constant mass?
- 0.001%
- 0.01%
- 0.05%
- 0.1% (correct)
Flashcards are hidden until you start studying
Study Notes
- The vacuum chamber should be at a temperature of 20±3°C and a pressure of 1 05±5°C
- The specimen should have a volume of not less than 0.001 m3
- The vacuum chamber should be maintained at a pressure of 1 05±5°C for a period of at least 24 hours
- The water tank should be kept at a pressure of approximately the water vapour pressure at the given temperature for at least 2 hours
- The scales should be sensitive to 0.05% of the mass of the specimen both while in air and while being submerged in water
- The state of constant mass of the dry specimen is assumed to be reached when the difference between two weighings, 24 hours apart, is less than 0.1 % of the mean value of the two readings.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
