What should a driver do if their vehicle hydroplanes? Question What should a driver do if their vehicle hydroplanes? Answers Accelerate. Use the brakes. Release the accelerator and push in the clutch. Take the vehicle out of gear. Explanation If your vehicle begins to hydroplane, you should slow down by releasing the accelerator and pushing in the clutch. This questions appears in the following tests: Maryland Class B Knowledge Test Minnesota Class B Knowledge Test Nebraska Passenger North Dakota Class B Knowledge Test Tennessee Class A Knowledge Test West Virginia Class A Knowledge Test