A polyamide A-3 flat belt 6 in wide is used to transmit 15 hp under light shock con-ditions where Ks = 1.25, and a factor of safety equal to or greater than 1.1 is appro-priate. The pulley rotational axes are parallel and in the horizontal plane. The shafts loose side is on top. The driven pulley is 18 in in diameter. See Fig. 17-10. The fac-tor of safety is for unquantifiable exigencies. (a) Estimate the centrifugal tension Fc and the torque T.
(b) Estimate the allowable F1, F2, Fi and allowable power Ha.
(c) Estimate the factor of safety. Is it satisfactory ?

What precautions should you take to prevent injuries when dealing with heavy loads?

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

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)?