Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A
$$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
B
$$\frac{1}{{64}}$$ and $$\frac{1}{8}$$
C
$$\frac{1}{2}$$ and 8
D
$$\frac{1}{2}$$ and 5
Correct Answer: $$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
