141) If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation

142) If threads on a bolt are left hand, threads on nut will be

143) Taper usually provided on cotter is

144) Applications in which stresses are encountered in one direction only uses following type of threads

145) The draw of cotter need not exceed