Calendar: 1898-1899 Page 773

FACULTY OF SCIENCE CXli 10 What is meant by entropy Draw and explain tern- perature-entropy diagram for the conversion of lb of wrater at 60 into steam at 212 and its subsequent reduction in temperature to 60 as saturated steam XX -HfUdjantcal ingtium'ng SECOND YEAR Not more than questions to he attempted If steel punch may be worked up to stress of 60 000 lbs per sq inch find the least diameter of hole that can be punched in wrought iron plate shearing stress 36 000 lbs per sq inch δ f" steel plate shearing stress 52 000 lbs per sq inch hollow cast iron column is 15 feet long and 9" outside diameter-thickness of metal f" Find the breaking load The ends of the column are fixed steel shaft has to transmit 150 at 100 revs per min Find its safe diameter When the shaft is solid When it is hollow the inside diameter being of the outside Compare the relative weights of the shafts What is meant by uan 4instantaneous' or 'virtual7 centre 1' "higher pair '4lower pair" Illustrate your answer by an example of each Describe briefly how you find the velocity diagram for the piston of an engine given the velocity of the crank pin and the length of the connecting rod How does the length of the connecting rod affect the piston velocity beam has span of 25 feet and is to be of rectangular section having its depth always twice its width It is loaded uniformly with ton per ft rim Show how you would design such beam to obtain uniform strength from end to end