52) A steel containing more than 0.8% carbon is known as eutectoid steel.

53) In leaf springs, the longest leaf is known as

54) The taper on cotter varies from

55) Which of the following screw thread is used for power transmission in one direction only.

56) When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.