49) Which among the following statements is NOT correct ?

The gear ratio between worm and worm wheel in a dividing head is 50 :1

Worm shaft of the dividing head has single start worm

20 turns of index crank revolve the spindle through 180 Degree

For rapid indexing, the worm and worm wheel are to be disengaged

Answer is:

The gear ratio between worm and worm wheel in a dividing head is 50 :1

5, 10, 15 holes respectively

10, 20, 30 holes respectively

24, 30, 36 holes respectively

20, 40, 60 holes respectively

Answer is:

9 Degree

18 Degree

40 Degree

45 Degree

Answer is:

Vertical milling machine

Plain milling machine

Bed type milling machine

Planer type milling machine

Answer is:

Machine spindle through the belt in the housing

Machine spindle through gears in the housing

Feed gear box

Vertical feed

Answer is: