Free Maryland CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Maryland CDL double/triple trailer endorsement test, make sure to know it! Our Maryland CDL Practice Test has the same questions as the real exam which is based on the Maryland CDL Manual. It covers most of the subject areas on the Double/Triple Trailers Test such as pulling double and triple trailers, the risk of rollover, managing space, and special considerations when hauling multiple trailers. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, you can take this CDL practice test an unlimited number of times to make sure you learn all the questions. Let’s try our Free Maryland CDL Double/Triple Trailers Practice Test today and pass your CDL endorsement exam! Good luck and keep driving safely!

Our CDL practice tests:
Based on 2021 MD commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MD CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
What is the purpose of a modulating control valve?
What is the "cut-in" pressure for most air compressor governors?
On large buses low pressure warning devices usually signal at ______.
When uncoupling twin trailers you should park:
At 55 mph on dry pavement, the air brake lag distance is how many feet?
How should the air leakage rate be tested?
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
Before you can supply air to the air tanks of a second trailer you need to:
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
During a normal drive, the spring brakes are held back by _____.
The tractor protection valve should pop out when air pressure falls to:
Why should you never leave your vehicle unattended without applying the parking brakes?
Why should air tanks be drained completely?
When you make an emergency stop, you should _________.
When performing the controlled braking method for an emergency stop, you are _________.
In dual-air systems the pressure should build to _______.
If the malfunction lamp stays on after the bulb check, __________.
When inspecting doubles and triples shut-off valves, which of the following is true?
The pintle hook should never be unlocked when:
A visual inspection after coupling should show that: