Flexible raceways come in several kinds, and they are not interchangeable just because they all bend.
Two products can look nearly identical on the shelf and be rated for completely different conditions. Picking the wrong one puts an unrated product in a place that needed a rated one.
The grounding provisions are the part that gets forgotten. Flexibility is a mechanical property; whether a given type provides an equipment grounding path, and under what conditions, is a separate question with its own answer. That is the same distinction as the ground rod lesson: what a thing is made of tells you nothing about what path fault current has.
Check yourself: A flexible raceway has a smooth outer covering and looks weatherproof. Is it liquidtight?
Answer: Not established. A flexible appearance does not tell you whether a product is liquidtight.
Liquidtight is a product designation, not a look. It comes from what the product is listed as, and two products can look the same and be listed differently.
No card. No account needed to start. Score by topic against the 70% mark.
Written from the owner's poster for this lesson. Nothing added beyond what the poster states.
Written for Texas apprentices as free study material. The Texas apprentice licence is an application, not an exam (Occupations Code 1305.161), and nothing here counts as apprenticeship hours or continuing-education credit. VoltMark is not affiliated with, endorsed by, or sponsored by NFPA, PSI, TDLR, or any state or local licensing authority. Always follow your employer's safety programme and your supervising electrician.
Electrician licensing exam prep: practice questions, timed exam simulations, and step-by-step help finding every answer in the NEC.