6. Purge - Why Do We Purge

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Slide 1: Slide
City and GuildsFurther Education (Key Stage 5)

This lesson contains 10 slides, with interactive quizzes, text slides and 1 video.

Items in this lesson

Slide 1 - Slide

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Purge - Why Do We Purge

Slide 2 - Slide

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This lesson is intended to be a supplement and revision aid. 
It is to be used together with your in-class lesson notes and gas book.
Completion of this lesson adds to your Guided Learning Hours.


Guided Learning Hours - 3 Hours

Slide 3 - Slide

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Introduction Video
The purging video is a bit of an old one and the sound isnt great but it explains why we purge.
It is an introduction to an important and quite complex part of your course.
I've popped in a few questions just to highlight some important details.

Don't expect to understand it all until you've been taught it in class and have actually carried out a purge in the workshop.

Slide 4 - Slide

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Slide 5 - Video

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To ensure that all the air has been purged from a system we multiply the size of the system pipework by...
A
10
B
1.5
C
2
D
The size of the meter

Slide 6 - Quiz

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When calculating the pipework volume (pv) we add 10% to the total capacity. WHy do we do this?
A
To allow for elbows and tees
B
To allow for any mistakes in our calculations
C
To allow for expansion due to heat
D
To allow for expansion due to cold

Slide 7 - Quiz

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Write down 3 things you learned in this lesson.

Slide 8 - Open question

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.
Write down 2 things you want to know more about.

Slide 9 - Open question

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.
Ask 1 question about something you haven't quite understood yet.

Slide 10 - Open question

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.