Which one of the following is used to hold the straight shank drill having diameter less than 12 mm ?

65) The rate of feed depends upon

66) Which among the following is NOT the factor for selection of cutting speed and feed for reaming a hole with a machine reamer ?

67) 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 ?