Q. Statement 1: Flank angle of symmetrical thread is known as thread’s half-angle. Statement 2: It is measured parallel to the axis of a thread.
✅ Correct Answer: (A)
t, f
Explanation: in a screw thread the angles between individual flanks and perpendicular to the thread axis which passes through the vertex of the fundamental triangle are called flank angles. the flank angle of a symmetrical thread is called as the half-angle of a thread.