A gypsum board level has 1,420 lf of board joints measured from the layout. The foreman adds 10 percent for corners, repairs, and waste. What tape length should be carried?
Correct Answer
D) 1,562 lf
Adjusted tape length is 1,420 x 1.10 = 1,562 lf. Other choices omit waste, round down too far, or apply a 20 percent allowance not stated.
Why This Is the Correct Answer
Adjusted tape length is 1,420 x 1.10 = 1,562 lf. Other choices omit waste, round down too far, or apply a 20 percent allowance not stated.
Why the Other Options Are Wrong
Option A: 1,420 lf
joint tape length, choice a: 1,420 lf equals 1,420. That copies a listed value without completing the operation.
Option B: 1,500 lf
joint tape length, choice b: 1,500 lf backs into 15,000 when divided by 10 percent; the accepted setup gives 15,620 on that same base.
Option C: 1,704 lf
joint tape length, choice d: 1,704 lf backs into 17,040 when divided by 10 percent; the accepted setup gives 15,620 on that same base.
Memory Technique
Store joint tape length with its last math move; nearby answers are usually unfinished versions of 1,562 lf.
Reference Hint
Open Gypsum Construction Handbook, 7th Ed., 2014; use the index entry or section for "Joint tape quantity allowance" to confirm that Adjusted tape length is 1,420 x 1.10 = 1,562 lf.
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