Bachelor's degree chemical engineers usually have their first job related to chemical, pharmaceutical, or biotech operations. This work may be in the field or in an office. Some young engineers work for contracting firms and may be involved in plant design, start-up, troubleshooting, or validation.
7. Get a pre-inspection. In some states, smog check stations will do a less expensive pre-inspection that shows if a car will pass or fail without officially recording the results with the state's registry of motor vehicles. If an owner knows the car is borderline, this might be a good idea, says Asmerian.
they 'purge' the system as when the cars are sitting on the start line for a while the engine heat turns the no2 in the line into a gas which is what they don't want. It is then 'purged' into atmosphere to get all the gas out of the line and ensure there is liquid ready to go when they nail it.