63) A bolt is specified as M12 x 1.25g. Which feature of the thread will have the tolerance 5g?

64) What is the least count in a bevel protractor, if main scale graduations are 1 degree apart and number of graduations in Vernier scale is 12?

65) What is the approximate lateral surface area of a right circular cone with radius of base 5 cm and slant height 20 cm?

66) A fastener is designated as M5 x 0.8. If the length of the threaded portion is 4mm, the number of threads available is

67) Tool life in turning will decrease by maximum extent if we double the