38) When the taper shank of the drill is larger than the machine spindle, it is fitted by means of :

39) How many taps are in one tap set ?

40) In the case of blind hole, which type of tap must be used ?

41) Which type of die stock is called a "quick cut die stock"

42) M4 x 20 is a machine screw of metric thread having 4 mm diameter and length is :