A nut is to be made for a screw of M10x1.5. What should be the size of drilled hole ?

68) Which among the following factors will NOT influence the selection of the cutting speed while performing operation on drilling machine ?

69) The reamer teeth and spacing are designed to assist in reaming more accurate holes with good surface finish. Which one of the following is true regarding the number of teeth and their spacing ?

70) Which among the following is an artificial abrasive ?

71) The angle of drill grinding gauge is