Compare S.I and C.I engines with respect to fuel used

AU-tube manometer contains oil (50 Ibf/ft), mercury (849 847 Ibf/ft) and water (62.4 Ibf/ft). For the heights shown/indicated what is the pressure differential between pipes A and B, or APAB? Oil to 3 in. Water 12 in. Mercury What is APAR (in Ibft?)?

A tire is inflated to a gage pressure of 35 psi at a temperature of 0ºF. Calculate the maximum temperature to which the tire may be heated without the gage pressure exceeding 50 psi.  A. 110ºF     B. 124ºF    C. 139ºF      D. 158ºF

. (Grinding Operations and Grinding Machines) (USCS units) In a centerless grinding operation, the grinding wheel diameter = 8 in, and the regulating wheel diameter = 5.0 in. The grinding wheel rotates at 1500 rev/min, and the regulating wheel rotates at 180 rev/min. The inclination angle of the regulating wheel = 2.3°. Determine the production rate of cylindrical work parts whose diameter = 0.5 in and length = 5.0 in. Solutions used; fr = TD₂N, sin I

Question: A cylindrical rod of 1040 steel originally 11.4 mm (0.45 in.) in diameter is to be cold worked by drawing;  the circular cross section will be maintained during deformation.  A cold-worked tensile strength in excess of 825 MPa (120,000 psi) and a ductility of at least 12%EL are desired.  Furthermore, the final diameter must be 8.9 mm (0.35 in.).  Explain how this may be accomplished.

Answer- 828 lbf=3.68kN