Smoke testing is used to test systems like vacuum or plumbing systems for leaks and other problems. It is also used to test sewage systems and closed/vacuum systems. The term can also be used metaphorically for quick tests in software development or electronics. Smoke used is non-toxic, but precautions should be taken.
The term “smoke test” is used in several contexts. Often, people use it to refer to a test of a system like a vacuum system or a plumbing system, where smoke is literally forced through the system to look for leaks and other problems. This term can also be used metaphorically when talking about testing other things, usually in the sense of a quick test conducted to confirm that the system under test is operational, even if it is only functioning at a very basic level.
One case where smoke testing is used extensively is in testing sewage systems. The smoke test can be used to identify leaks and entrances and can be used if wastewater is leaking, building up or if there are other problems. In this type of smoke test, non-toxic smoke is blown through the sewer system and observers watch for plumes of smoke which can reveal telltale problems. This type of testing is usually performed by public works workers for the purpose of monitoring public or environmental safety.
While the smoke used is nontoxic, it’s generally not a good idea to inhale it, as it can be uncomfortable. Persons working on the system may wear face protection to reduce the risk of inhalation, and observers may be advised to stand back. Once the smoke clears the system, it will dissipate harmlessly.
Some types of closed and vacuum systems can also be tested with the smoke test. In this case, the technician wants to confirm that the system is truly sealed before filling it, then it is filled with smoke and the smoke is monitored. If smoke is coming out, the system is not closed and this needs to be addressed. This type of smoke test reduces waste and the risk of toxin exposure by ensuring that a closed system is truly and truly closed before it is filled.
People also sometimes refer to the quick connection of the electronics to confirm they are functional as a “smoke test”. In this case, the equipment is plugged in and turned on to check for any obvious problems. This can be done during development or repair due to security concerns or concerns about how the repairs are going. “Smoke test” is also used in software development, to refer to a quick test where the software is fired up and the engineer waits to see what happens. If the software fails catastrophically, it’s time to go back to the drawing board, and if it works, you can continue with more extensive testing.
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