Question

What is the formula of the angle of a V-groove?

(a) Sin A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2)

(b) Tan A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2)

(c) Cot A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2)

(d) Cos A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2)

I got this question during an online exam.

I'm obligated to ask this question of Measure the Angle of a V-Groove in section Miscellaneous Measurements (EM) of Engineering Metrology

Answer 1

Right choice is (a) Sin A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2)

To explain: Sin A/2 = (d2-d1)/2 ÷ (h2-h1)-((d2-d1)/2) is the formula of angle of groove where A is the angle of V-groove, d2 and d1 are the diameters of discs and h2 and h1 are the height of discs from surface plate.