One way to a fire is to cool the area around it. A Class fire involves flammable liquids, gases, and other chemicals. A Class fire involves live electric equipment. The two types of electric power sources are alternating current (AC) and direct current (DC). Of these two types, power sources cause more severe shocks. The three elements of the fire triangle are , , and . How often should the batteries in a smoke detector be changed? Electricity always follows the path of least . How often should a portable fire extinguisher undergo a complete maintenance check? Water and water-based solutions are best used to extinguish a Class fire. Poor lifting techniques are a frequent cause of injuries.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?