A hot process area inside the plant has a pair of exhaust fans for removing waste heat. Every few days, operators report squealing coming from one of these fans. Knowing the squealing indicates something is wrong, the maintenance supervisor sends whoever is available to the roof to fix the squealing. This way, he figures, he’ll delay the inevitable breakdown and avoid the ventilation problems and costs associated with it.
Electrical Troubleshooting Quiz - September 27, 2016
How to prevent and repair exhaust fan breakdowns