Which of the following cutting oil is used to prevent ?clog* in fine grinding?

30) Which of the following chisel is used for squaring material at the comers?

31) In a drill bit the angle between the chisel edge and the cutting lip is known as

32) One degree

33) If the volume of a cone is (1000 x Pie) /3 and the diameter is 20 mm, then the height is?