Asteel rotating-beam test specimen has an ultimate strength sut of 1600 mpa. estimate the life (n) of the specimen if it is tested at a completely reversed stress amplitude σa, of 900 mpa.

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.