Final answer:
Specimens should not be tested if individual diameters vary by more than 2%, which is not one of the provided options. Accurate measurement and consistent diameter sizes are crucial for precision in engineering and scientific applications.
Step-by-step explanation:
When testing the dimensions of cylinders in engineering practices, it is important to ensure the diameters are consistent to maintain accuracy in measurements and outcomes. According to standards, specimens should not be tested if any individual diameter of a cylinder differs from another diameter by more than 2%. Therefore, none of the options A.1%, B.5%, C.10%, or D.15% are correct.
For precision, measuring devices such as graduated cylinders can typically measure to the nearest 0.1 mL. When measuring volumes, it is key to estimate to the nearest tenth for accuracy. This is particularly important in applications such as determining the amount of decrease in gas volume in engines or when conducting tests for pressure tolerances in valves.