The penalties will depend on your age and the facts surrounding your charge/charges. A local attorney may be able to negotiate some type of diversion. See the link below to learn more about possible penalties with underage charges.
If you are talking about field tests (one leg, walk and turn, HGN eye test) then no. If you are talking about a chemical test to determine your alcohol content, the law under 4911.191 says you shall submit. It is not technically an offense not to submit, but it will impact the length of your license suspension and the mandatory minimum penalties if you are convicted since you have a prior 3 years ago.
Especially with a CDL, you should get an attorney. You will want them there on your behalf to negotiate. No point speeds and dismissals can be a possibility depending on prosecutor policy. Depending on the county, a trial may be necessary. Get someone on board sooner rather than later.
A preliminary hearing should be held within a reasonable time no longer than 10 days from arrest or service of summons if in custody or 15 days if out of custody (unless extraordinary circumstances exist). Charges are typically dismissed for future indictment meaning the case will be presented to the Grand Jury for determination at a later date. The person shall then be brought to trial within 270 days of arrest on a felony.
Given your probation status, you will want to be very careful how you proceed. You should hire a local defense attorney to help fight the new charges or at least negotiate for continuing probation rather than imposing jail.
Sealing and expungement are two terms used for the same thing. You should be able to have a dismissed drug paraphernalia sealed by filing the necessary paperwork with the court and attending the hearing. An attorney can file the paperwork for you and may be able to attend the hearing without you having to be there (depending on the court).