Calendar: 1893-1894 Page 858

cxl FACULTY OF SCIENCE THIRD YEAR in י ו ן JUflOl י י ί4 υ1 li MOfjqiiB 0Ι Χ ο 10911 What will be the difference as to work done heat expended between 14 cub ft of air at initial pressure 40 lbs per sq inch absolute and temperature 165 ex- panding to 21 cub ft at constant temperature and at constant pressure Log 1-5 40475 hp kv 532 ft lbs Vol of lb air at 32 and atmospheric pressure 147 lbs per sq in 12-38 cub ft If the same volume of air expanded adiabatically what would be the final temperature and pressure Given the following data for an Otto gas engine Cylinder 85 in diam Stroke 18 in ן Flywheel ft ins diam Load on brake 72Ό5 lbs τ π Γ 1JJ ΓΛϋ W' C3 Revs per min 1697 Explosions per min 39 Mean pressure Indicator cords Gas per explosion 064 cub ft Calorific value of fuel 48900 ft lbs per cub ft Heat rejected in exhaust 40 per cent of total heat developed Water used per explosion 0206 lbs Rise of temp in jackets 49 Fahr Find heat rejected in jackets per explosion and gas per LII per hour Work out mechanical efficiency and draw up heat account for engine in question Find the height of governor running at 50 revs per minute What would be the height of Porter's governor running at the same speed if the load lb and the weight of each ball ilb י 88Ί lbs