engineering recuitment ISRO Scientist Mechanical Mock Test Production Engineering (Manufacturing) Machining Processes and Machine Tools Different Machining Processes
In a plunge grinding operation, the workpiece is 10 mm wide, the wheel is of 20 cm diameter and 2 cm wide. The wheel speed is 3000 r.p.m. and the table speed is 2.5 m/min. If the depth of cut is 0.02 mm, grain density is 250/cm2 and the grinding forces are 20 N tangential and 38 N thrust, the specific energy is
1
75.4 × 104 N/mm2
2
7.54 × 104 N/mm2
3
75.4 × 106 N/mm2
4
7.54 × 106 N/mm2