I'd probably use 'about', but I don't think it 'needs' either.
"When asked to explain his whereabouts, Peter was evasive."
or
"Peter was evasive about where he had been, when he was asked."
cobra is a simple maneuver.till now no new advanced tech. is been transplanted in this. Answer: Yes. The Cobra can only be done within a certain speed range and around 400 km/ hr is optimum.