49) The standard temperature at which measurement shall be taken is

50) Father's age 7 years before was one more than 3 times of his son's age. Father's age after 10 years will be 2 less than 2 times son's age. What is son's present age?

51) Match the following non-conventional machining process with the corresponding material removal mechanisms P: Chemical Machining 1: Erosion Q: Electrochemical Machining

52) As per ISO designation for carbide tool inserts - S P U N 12 03 08, 'N' represents

53) The operation done on riveted joints to improve leak tighness