129) A workpiece is chamfered to remove burrs. It is observed that the chamfer width is not uniform throughout the periphery of chamfer on the workpiece. Which one of the following is the cause for this defect ?

The angle of chamfering is not correct

The chamfering tool not set square to the work axis

The work face not running true

The overhang of the tool is too much

Answer is:

The work face not running true

length of the workpiece

material of the workpiece

diameter of the workpiece

operation to be performed on the workpiece

Answer is:

allowing dismantling of the top slide easily

eliminate the backlash of the screw and the nut in the assembly

adjust the slackness developed due to wear

permit flow of the lubricant between the sliding surfaces

Answer is:

By a chaser

By a die head

By a single-point tool

By a split die

Answer is:

improve the appearance

improve the wear resistance property

prevent them from getting corroded

be used only on automatic threading machines

Answer is: