Calendar: 1882-1883 Page 665

662 APPLIED SCIENCES If the corners of square whose side is ft are acted on by parallel forces of and 11 lbs respectively find the distances of the point of application of the resultant from the sides of the square 10 right-angled isosceles triangle is cut out of circle in in diameter its angular points being on the circumference find the position of the centre of gravity of the remainder Planttfactttrmg &rt antt 4fffiatf mtr2 SECOND YEAR In some hydraulic presses the safety and relief valves are combined make sketch and explain the construction of the combination State the method of computing the weights in the scale pan What is the maximum pressure in tons per circular inch usually put upon the ram of hydraulic press Why is the pressure limited to that amount If the ram is in diameter what will be the maximum pressure in tons upon it Make sketch of double-beat pump valve and show what effect the curved surfaces of the valve have upon its opening and shutting Why is stand-pipe sometimes used on the suction-pipe of pump In what cases would you apply it Describe Newcomen's atmospheric engine In what particulars did Watt improve this engine For what reason is lap put upon the steam and exhaust sides of steam slide-valve What is the effect produced by giving lead to the valve The lap on the steam side of slide-valve is in that on the exhaust side is £ in and the lead is £ in Find the opening for exhaust which the valve will give at the lower port when the piston is at the top of its stroke Explain the mechanism for opening the steam-valve in single acting Cornish engine Show the contrivance adopted