You should be able to lock up the brakes if you don't have ABS. Locking up the brakes is the fastest way to stop on DRY pavement(and your brakes will screech in this case). You may have air in the lines.
In a couple of cases, I had to do this in the past in cars without ABS and I am glad the brakes locked or else I would have been under the truck in front of me.