A water main is to be laid to supply water to a subdivision located 2 miles from a water tower. The water level inside the tower is 150 ft above ground, and the subdivision consumes a maximum of 10,000 gpm of water. Assume schedule 40 new commercial steel pipe. The pressure above the water in the tank is 1 atm, and the water pressure at the subdivision is 30 psig: (a) What size (calculate the diameter in inches as well as the recommended standard nominal pipe diameter in inches) pipe should be used for the water main if you ignore the kinetic energy change? (b) After ignoring the kinetic energy change, validate whether this was a good assumption.

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

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

The quality is zero at a)-the saturated vapour state b)-the saturated liquid state c)-the saturated liquid-vapour mixture state d)-none of the states in the other answers