engineering recuitment PGCIL Junior Technician Trainee (Electrician) Mock Test 2023 Utilization of Electrical Energy Hardening
The depth of penetration, in the case hardening of a steel pulley, required is 105 μm. The relative permeability is unity and the specific resistance for steel is 5x10-7 Ω-m. Determine the frequency required.
1
11.48 MHz
2
22.96 MHz
3
5.74 MHz
4
16.23 MHz