A technician records the following torque values during sequential bolt tightening on a flange: 47 ft-lb, 52 ft-lb, 49 ft-lb, 51 ft-lb, 48 ft-lb, and 53 ft-lb. The specification requires all values to fall within ±5% of 50 ft-lb. Which reading(s) fall OUTSIDE the acceptable range?
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A
47.5 ft-lb is the lower limit, so 47 ft-lb is the only out-of-spec reading
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B
52 ft-lb and 53 ft-lb both exceed the upper limit of 52.5 ft-lb
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C
53 ft-lb is the only reading outside the ±5% tolerance band
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D
All readings are within the acceptable range of 47.5–52.5 ft-lb