Which of the following drill types would be the most likely choice to drill a hole with a 100 mm (4.0 in) diameter (one best answer):
A)gun drill
B)spade drill
C)straight-flute drill
D)twist drill

Question

Quizplus · Accepted Answer

Spade drills are designed for large diameter holes and can efficiently create holes of the size specified (100 mm or 4.0 inches) due to their construction and cutting geometry. They are more suitable for this application than the other types listed, which are generally used for smaller diameters or have design limitations for such a wide hole.

Which of the Following Drill Types Would Be the Most