Oklahoma CDL Practice Test: Double and Triples - Test 2023
Based on 2023 OK CDL Handbook
Instruction: To obtain this endorsement for pulling two or three trailers, applicants must pass a 15-question test. And to pass the test, applicants must score at least 80%. Test questions are from the OK CDL Handbook. The Double/Triple trailers endorsement can be used with the Class A CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Oklahoma DPS locations.
1. Coolant recovery containers permit you to ________.
Cool down the coolant.
Check the coolant level while the engine is hot.
Store extra coolant in case you run out of the main coolant.
None of the listed answers.