Search results for A space has an occupancy of 300 people engaged in sedentary activity from 6:00 pm till 8:00 pm. The installed light wattage of one light is 87 W and there are 50 lighting fixtures that are recessed unvented fluorescent and always turned on. The hall contains 4 LCD projectors each amounts 2000 Btu/hr and 10 computerized wedding equipment with 1200 Btu/hr each, all are fan cooled. The equipment operates between 4:00 pm and 11:00 pm. If the special allowance factor is 1.2, the convective heat gain at 4:00 P. M. in Btu/hr is:

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.