Correct option is D
In milling fixtures,
tensions (relief slots or recesses) are provided at the bottom of the base plate to ensure
proper location and stability of the fixture. These tensions help in
positioning and aligning the fixture accurately on the machine table. This ensures that the
fixture sits firmly and correctly without rocking, leading to
precision in machining.
Without these tensions, the fixture may not rest properly, affecting
dimensional accuracy and potentially causing
misalignment of the workpiece.
