CDL Doubles/Triples (T) Endorsement Test
Endorsement rules: practice questions
Our CDL Doubles/Triples bank has 5 questions on this topic. Here are 3 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Besides Section 7, which manual sections should you study for the doubles/triples test?
- Sections 2, 5 and 6
- Sections 4 and 10, on buses
- Section 4 only
- Sections 8 and 9
Show the answer
A. Sections 2, 5 and 6 — You should also study Sections 2, 5 and 6 (CDL Manual 7 intro)
Question 2
Can a doubles/triples endorsement be placed on a commercial learner's permit?
- Yes, after 14 days with the permit
- No, only P, S and N may go on a learner's permit
- Yes, but only for doubles, not triples
- Yes, as long as you also hold an air brake learner's permit
Show the answer
B. No, only P, S and N may go on a learner's permit — 49 CFR 383.93(a)(2): the only endorsements allowed on a CLP are P, S and N
Question 3
What test does federal law require for the doubles/triples endorsement?
- A road test with an examiner in a set of doubles
- A knowledge test
- A knowledge test and a skills test in triples
- A skills test only
Show the answer
B. A knowledge test — 49 CFR 383.93(c)(1): double/triple trailers, a knowledge test