Can I limit the amount of quota a test consumes?

Yes, you can control the amount of quota a test consumes when creating the test. You just need to indicate that the End Mode of the test will depend on the number of page views, and then select the maximum amount of page views allowed to be spent by that test.

When configuring a test, change its end mode so that the test automatically finishes when reaches the amount of page views consumed.
When configuring a test, change its end mode so that the test automatically finishes when reaches the amount of page views consumed.