2024 NH DMV Practice Test 14 Based on 2024 NH Driver's Handbook 21. A chemical test is used to measure A Vision. B Reaction time. C Driving ability. D Blood alcohol content. Next More 21/30 Progress 0 Errors Restart Next Next NH Permit Practice Test 14 Back to Test List NH Permit Practice Test 13 NH Permit Practice Test 15 Challenge Library 12 More NH DMV Practice Tests 15 NH Permit Practice Test 15 16 NH Permit Practice Test 16 17 NH Permit Practice Test 17 18 NH Permit Practice Test 18 19 NH Permit Practice Test 19 20 NH Permit Practice Test 20 21 NH Permit Practice Test 21 22 NH Permit Practice Test 22 23 NH Permit Practice Test 23 24 NH Permit Practice Test 24