120) What is the function of the drop-worm provided in the apron of a centre lathe ?

Answer is:

Engages / disengages the power feed

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121) The tailstock barrel has an internal taper. Which one of the following standard tapers is provided in the barrel bore ?

Answer is:

Morse taper

122) When machining irregularly shaped workpiece held in face plate, counterbalancing is done by clamping weights. This is done

Answer is:

After mounting the face plate on the spindle nose and keeping the spindle in neutral position

Explanation:

When machining irregularly shaped workpiece held in face plate, counterbalancing is done by clamping weights. This is done after mounting the face plate on the spindle nose and keeping the spindle in neutral position.

123) Lead is the metal used for balancing weight during lathe face plate work. The reason for using lead is that it is very

Answer is:

heavy

124) Which one of the following methods of catching the threads consumes more time when cutting odd pitch threads ?

Answer is:

Marking the work holding device and lead screw

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