I've passed a few cars through Vic Roads inspections when registering or changed engines. Basically, the guys who are doing the inspection are matching up the cars details with the details of the car. Engine numbers, Vin numbers, etc.
They will ask you where the engine number is on the block unless they know the car type. They will do a quick check for visble RW items, such as tyres, windscreen, lenses of lights etc. They do not go through you car with a fine tooth comb.