What is the maximum acceptable size for the dimension written as 7.439 inches plus .007 inches minus .003 inches?

What is the maximum acceptable size for the dimension written as 7.439 inches plus .007 inches minus .003 inches?

• A. 7.436
• B. 7.446
• C. 7.442
• D. 7.439

Answer: (B)

Asymmetric tolerances set different allowable extents above and below the nominal size. Here, the dimension is 7.439 inches with a plus tolerance of 0.007 inches and a minus tolerance of 0.003 inches. The largest permissible size comes from adding the positive tolerance: 7.439 + 0.007 = 7.446 inches. The smallest permissible size would be 7.439 - 0.003 = 7.436 inches, so the acceptable range is 7.436 to 7.446 inches. Therefore, the maximum acceptable size is 7.446 inches.

Asymmetric tolerances set different allowable extents above and below the nominal size. Here, the dimension is 7.439 inches with a plus tolerance of 0.007 inches and a minus tolerance of 0.003 inches. The largest permissible size comes from adding the positive tolerance: 7.439 + 0.007 = 7.446 inches. The smallest permissible size would be 7.439 - 0.003 = 7.436 inches, so the acceptable range is 7.436 to 7.446 inches. Therefore, the maximum acceptable size is 7.446 inches.