Calendar: 1898-1899 Page 772

cxi FACULTY OF SCIENCE If steam engine were supplied with steam at 185 lbs press absolute 375 and had condenser temperature of 126 how many thermal units per per hour would you require to supply it if it could turn into work 50 as much as an ideal engine working on the Carnot Cycle The slide-value of steam engine has maximum opening to steam of inch the lead is of an inch and the valve stroke inches At what point in the stroke does cut off occur if the obliquity of the connecting and eccentric rods is neglected reservoir holding 100 000 gallons of water at an eleva- tion of 100 feet above datum level supplies three fire hyd- rants each capable of discharging 4000 gallons per hour The connecting pipe is 2000 feet long and is free from bends What must be the diameter of the pipe in order that the ts from the hydrants may rise to height of 70 feet above datum level Take the mean value for the frictional co- efficient Find the height of pendulum governor which makes 100 revs per minute What will it become if the governor is loaded with weight equal to times the weight of the two balls What could you safely transmit by single belt inches wide running on equal pulleys feet in diameter The pulleys turn at 120 revolutions per min What would be the minimum tension on the belt at maximum safe load An engine running at speed of 300 revolutions de- velops 250 It is found that during portion of the stroke thero is an excess of 8000 ft lbs over the mean steady resistance What must be the concentrated weight of the fiy wheel ft in diameter to control the speed so that its fluctuations above and below mean speed shall not exceed 21 each way Can this safely be accomplished by one cast iron fly wheel Draw up heat account for steam engine for which the following particulars are ven Cylinder 8" diameter stroke 24" revs per min 100 admission press 127 lbs abs 345 exhaust atmospheric mean pressure 52 lbs per sq inch steam per per hr 25 lbs