So long as it is a commercial vehicle and the GVW of the trailer is greater than 10,000 lbs, yes. If it's hooked by a pintle and clevice, you will receive a "no tractor-trailers" restriction.
No
No, unless you're hauling something which requires a hazmat endorsement, such as contaminated soil.
That would depend on the weight rating of the trailer and bridge law. For a straight truck, five to seven tons.
Air brakes have absolutely ZERO determination in whether or not a vehicle requires a CDL.
26000 lbs of cargo? A tandem straight truck, such as a flatbed or a dump, could haul that amount of weight legally.
No. Air brakes are not a parameter in determining whether or not a vehicle needs a CDL.
26000 increased by 30 percent =33800=26000 + (30% * 26000 )=26000 + (0.3 * 26000 )=26000 + 7800= 33800
To answer you we need to know what country's traffic regulations you are asking about.
26000
7% of 26000 = 7% * 26000 = 0.07 * 26000 = 1820
70% of 26,000= 70% * 26000= 0.7 * 26000= 18,200
26000