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Antilock Brakes (ABS) Practice Test

Question 1 of 8

As of what date are trailers and converter dollies required to be equipped with ABS?

A Built on or after March 1, 1998 B Built on or after March 1, 1975 C Built on or after March 1, 1997 D Built on or after March 1, 1991

✓

Correct!

Correct. All trailers and converter dollies built on or after March 1, 1998 are required to have ABS, though many built before that date were voluntarily equipped with it as well.

49 CFR 393.55(c)(2) (ABS equipment requirement, effective March 1, 1998); AAMVA CDL Manual

✗

Not quite.

Wrong. 1975 is the date tied to the spring-brake requirement exemption for older trailers and dollies, not the ABS requirement date.

The correct answer is A: Built on or after March 1, 1998.

49 CFR 393.55(c)(2) (ABS equipment requirement, effective March 1, 1998); AAMVA CDL Manual

✗

Not quite.

Wrong. March 1, 1997 is the ABS-required date for truck tractors, not for trailers and converter dollies, which have the later March 1, 1998 date.

The correct answer is A: Built on or after March 1, 1998.

49 CFR 393.55(c)(2) (ABS equipment requirement, effective March 1, 1998); AAMVA CDL Manual

✗

Not quite.

Wrong. There is no ABS requirement tied to 1991 for trailers or dollies; the correct required date for this equipment is March 1, 1998.

The correct answer is A: Built on or after March 1, 1998.

49 CFR 393.55(c)(2) (ABS equipment requirement, effective March 1, 1998); AAMVA CDL Manual