486) The property of a material which enables it to resist fracture due to high impact loads, is called toughness.

487) The resultant axial load on a bolt depends upon

488) Wire ropes as compared to cotton ropes

489) The thickness of key is usually taken equal to one-sixth of diameter of shaft.

490) Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel pla