Aflux-cored arc-welding process is used to join two low-alloy steel plates at a 90° angle. the joint is an outside fillet weld. the plates are 1⁄4-in thick. the weld bead consists of 55% metal from the electrode and 45% from the steel plates. the heat transfer factor for fcaw = 0.9, and the melting factor = 0.65. welding current = 120 amps, and voltage = 20 volts. velocity of the welding head = 25 in/min. electrode wire diameter = 0.125 in. a core of flux (compounds that do not become part of the weld bead) runs through the center of the electrode. the diameter of the core = 0.0625 in. (a) what is the cross-sectional area of the weld bead? (b) how fast must the electrode wire be fed into the welding operation?

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

What is creep? what is stress relaxation?

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)?