Laser drilling is a precision process that is used for creating small holes in materials. The range of diameters achievable with laser drilling is typically between 0.005 mm and 1.25 mm. This makes laser drilling ideal for high-precision applications such as electronics and aerospace industries, where small, accurately placed holes are required. The other options do not cover the typical range for laser drilling diameters, which is why option (C) is the correct answer.
A through hole of 10 mm diameter is to be drilled in a mild steel plate of 30 mm thickness. The selected spindle speed and feed for drilling hole are 600 revolutions per minute (RPM) and 0.3 mm/rev, respectively. Take initial approach and breakthrough distances as 3 mm each. The total time (in minute) for drilling one hole is ______. (Rounded off to two decimal places)
In a cold rolling process without front and back tensions, the required minimum coefficient of friction is 0.04. Assume large rolls. If the draft is doubled and roll diameters are halved, then the required minimum coefficient of friction is ___________. (Rounded off to two decimal places)
If A + B means A is the mother of B; A - B means A is the brother of B; A % B means A is the father of B, and A \(\times\) B means A is the sister of B, which of the following shows that P is the maternal uncle of Q?