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Colorado CDL Practice Test: Class A - Test 2 2020

(From the 2020 Colorado CDL Handbook)
Number of tests: 2
Number of questions: 30
Passing score: 80

Directions: When applying for this license, applicants must pass a 50-question test. And applicants must score 80% to pass the test. The following questions are based on the details provided in the Colorado Commercial Driver Handbook. Endorsements that may be used with a Class A CDL include Hazardous Materials, Passenger, Double and Triples, HazMat and Tanker, Air Brakes and School bus. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Colorado DMV locations.

You have made error(s) so far.
Your Challenge Library: 0

1. The emergency line has two functions. It controls the emergency brakes on combination vehicles and what else?

2. What is the purpose of dummy coupler?

3. During a pre-trip inspection of your vehicle, you can check if your vehicle is leaking by inspecting for _______.

4. When does the air compressor governor allow air to start pumping?

5. The air pressure should build from ____ to ____ within 3 minutes.

6. When uncoupling, if you park the trailer at an angle ______.

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