43) Consider the following statements for a power shovel: (i) Output can be increased by reducing the angle of swing for a given depth of cut. (ii) For a given angle of swing, output will be maximum at optimum depth of cut. (iii) Output can be increased by keeping the depth of cut less than optimum depth, (iv) Output can be increased by increasing the size of shovel. Of these statements

44) Assertion A: For a given depth of cut, the output of a power shovel can be increased by decreasing the angle of swing.Reason R: If the angle of swing is decreased, the cycle time will be decreased.Select the correct answer

45) If the output of a dragline for 90° angle of swing at optimum depth of cut is X, then the output for 120° angle of swing at 120 % of optimum depth of cut will be

46) Output of a bulldozer is (i) increased if drawbar HP of the tractor is increased for a given hauling distance (ii) decreased if drawbar HP of the tractor is increased for a given hauling distance (iii) increased if the hauling distance is increased for a given drawbar HP of the tractor (iv) decreased if the hauling distance is increased for a given drawbar HP of the tractor Of these statement

47) A machine is purchased for Rs. 10,000,00/- and has an estimated life of 10 years. The salvage value at the end of 10 years is Rs. 1,50,000/-. The book value of the machine at the end of 5 years using general straight line method of evaluation of depreciation is