47. The indicated power developed by an engine with compression ratio of 8, is calculated using an air- standard Otto cycle (constant properties). The rate of heat addition is 10 kW. The ratio of specific heats at constant pressure and constant volume is 1.4. The mechanical efficiency of the engine is 80 percent. The brake power output of the engine is kW (round off to one decimal place). 48. A vector field is defined as X Z f(x,y,z)= [x + y + z}]}* * [x + y+2']" * [x + y+2}* y+z M Where i,j,k are unit vectors along the axes of a right-handed rectangular/Cartesian coordinate system. The surface integral [[f.dS (where dS is an element surface area vector) evaluated over the inner and outer surfaces of a spherical shell formed by two concentric spheres with origin as the center, and internal and external radii of 1 and 2, respectively, is (A) 4 (B) 0 (C) 2 (D) 8 49. The following data applies to basic shaft system: tolerance for hole = 0.002 mm, tolerance for shaft = 0.01 mm, allowance = 0.003 mm, basis size 50 mm The maximum hole size is mm (round off two 3 decimal places).