61.
In designing a key, it is assumed that the distribution of forces along the length of key

63.
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

64.
The effective stress in wire ropes during normal working is equal to the stress due to

65.
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as