Apump supplies oil at 25 gpm to a 3-in diameter double acting hydraulic cylinder. if the load is 2000 lb (extending and retracting) and the rod diameter is 3 in, find: a) the hydraulic pressure during the extending stroke. b) the piston velocity during the extending stroke c) the cylinder horsepower during the extending stroke. d) the hydraulic pressure during the retraction stroke. e) the piston velocity during the retraction stroke f) the cylinder horsepower during the retraction stroke.

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c