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 function of an "application pressure gauge"?
What is a modulating control valve?
When coupling or uncoupling, trailer or dolly wheel should always be:
The air compressor should pump air starting at what psi?
A front brake limiting valve ______.
Which of these statements about the handling of doubles and triples is true?
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
How do you check the low pressure warning signal?
During normal operation, the brakes of the double/triple trailer are controlled by:
A safety valve that releases air _______.
Automatic air tanks _______.
An air compressor can be cooled by _______.
Why does a heavily-loaded vehicle take longer to stop than a lightly-loaded vehicle?
When driving doubles or triples, for safer handling which trailer should be at the rear?
After coupling the converter dolly to the first trailer, the pintle hook should be:
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
A safe speed on a curve for a smaller commercial vehicle:
What affects the stopping distance for air brakes?
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
Why should you not drive your vehicle if the air pressure does not build up quickly enough?