A table answers correctly only if you land on the right row and the right column -- and then read the notes attached to it.
Slipping one row gives you a number that looks completely reasonable and is completely wrong. There is nothing in the answer itself to tell you it came from the line above.
Take a simple practice table -- items A, B and C with values 10, 20 and 30. You want the value for item B. Find the row for B, follow it across to the VALUE column, and read 20. Straightforward, until the rows are half an inch apart and there are forty of them, which is when a straight edge or a finger on the row is worth more than confidence.
Check yourself: In that table, what is the value for item B, and how do you know you did not slip a row?
Answer: 20. You confirmed it by holding the row and reading across to the column headed VALUE, rather than reading down and estimating.
A table is a grid, and a value means nothing without both of its coordinates. Fixing the row first and then moving along it is what stops a one-line error.
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.
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