Netters ALL US private pilots are required to receive a minimum of 3 hours of Instrument instruction, under simulated or actual conditions from an instructor prior to taking his checkride, and has to be able to demonstrate reasonable aircraft control of level flight, turns to a heading, shallow climbs and shallow descents, as per the new/updated Practical Test Standards put out by the FAA. Greater emphasis has been placed on this proficiency both in the checkrides and BFR checks due to the rise in the last few years of no-instrument rated pilots accidentally blundering into IMC. IF you receive the proper training you should have a good start on the skills necessary to remain safe if the accident occurs. And as another post mentioned proper pre-flight prep and planning after the checkride is complete.
Colin Rainey N96TA CFI, CFII, MEI