1) Which of the following mechanism is used in a shaper to convert the oscillatory motion to linear motion?

Answer is:

Crank and slotted mechanism

Explanation:

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Which of the following mechanism is used in a shaper to convert the oscillatory motion to linear motion?

2) Clapper box in shaper is used in order

Answer is:

To lift the tool during return stroke

3) The purpose of tumbler gear in the lathe is to

Answer is:

Reverse the spindle direction

Explanation:

The tumbler gear unit consists of three gears, having the same number of teeth and it connects the spindle gear to the fixed gear. Tumbler gear unit is also called the reversing gear unit as it is used to change the direction of feed of the tool for the same direction of rotation of the spindle. Tumbler gear unit can be engaged and disengaged with the fixed stud gear by the operation of the hand lever provided in the unit.