74) The main purpose of using worm and worm wheel drive in machines and their accessories is to :

Transmit large torque

Provide large speed reduction from worm shaft to worm wheel

Transmit higher speeds

Provide large speed reduction from worm wheel to worm shaft

Answer is:

Provide large speed reduction from worm shaft to worm wheel

The work is fed in the same direction as the rotation of the cutter

Chip removal starts at the thickest part

Machine with backlash eliminator is essential

The work is fed against the direction of the cutter rotation

Answer is:

24, 12

8, 6

7, 5

3, 2

Answer is:

8 Degree

12 Degree

20 Degree

28 Degree

Answer is:

The cylindrical cutter set on a mandrel will be in between centres

The cylindrical cutter set on a mandrel will be in between chuck and centre

The cylindrical cutter set on a mandrel will be only in chuck

The cylindrical cutter set on a mandrel will be within chuck and steady rest

Answer is: