Getting endorsements

Got my cdl about 3 months ago. Didn't do any endorsements. I want to get dbl/trpl, tanker and haz mat endorsement now.
Besides hazmat, do any of these require more than just a dmv test? Road skills test required?

I'm in Nevada if that matters

 

No road skills test.

 

You show up take the test and then boom you can drive double 53's full of explosives down the road.

 

But you can’t drive a church bus unless you take a road test. LOL

 

Those three are DMV written/computer test only, no drive test.

 

All on computer. Get em.

 

Yes. The multiple choice format if the tests can only cover true/false, quantifiable type material. The manual will have more descriptive explanations and diagrams. Google anything that you have further questions about and post them here as well.