When not in use what state should the vacuum system be in:

Always kept under vacuum – before finishing a session the chamber must be pumped.

The chamber must be vented at the end of a session

It is dangerous to move the stage when the sample is first inserted. You must first:

Get the sample into focus and link to the working distance

Get signal to all the detectors

The beam is turned on and you are looking at the sample

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1When not in use what state should the vacuum system be in:
1. AAlways kept under vacuum – before finishing a session the chamber must be pumped.
2. BThe chamber must be vented at the end of a session
3. CDoesn’t matter
2It is dangerous to move the stage when the sample is first inserted. You must first:
1. ALeave the stage where it is
2. BGet the sample into focus and link to the working distance
3. CMove to 10mm immediately
3If the sample is not at the correct working distance you won’t:
1. AGet signal to all the detectors
2. BBe able to image
3. CBe able to focus
4You can’t get an image, what do you check first:
1. AThe magnification is correct
2. BThe beam is turned on and you are looking at the sample
3. CThe focus is correct

Description: In order to be granted access to an SEM after hours you are required to pass a competency test. You must answer all questions correctly. Please note that Adelaide Microscopy staff reserve the right to refuse after-hours access until an adequate level of competence on the instrument is demonstrated. Completion of the competency test does not guarantee access.
Author: aoife_152
Language: English
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Tags: sem microscopy competency sem competency test
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