Design Questions Set 38:
Find the ratio per stage if the overall reduction ratio is 300 (up to 2 decimal places).
Solution:
The metal wire under varying stress shows σ max = 250 Mpa and σ min = 50 Mpa.
Determine the Stress Ratio. (Up to 2 decimal)
Solution:
In which of the following brakes is the braking force applied tangentially?
Solution:
One of the categories of optimum design consists of:
Solution:
What is the term for the distance between the centers of the rivets in adjacent rows of a zigzag riveted joint?
Solution:
Which machine is used to experimentally determine stress concentration factors?
Solution:
A mild steel rod supports a tensile load of 50 kN. If the stress in the rod is limited to 100 MPa, find the size of the square cross-section of the rod.
Solution:
The dimensions of the mating parts, according to the basic hole system, are given as follows:
Hole: 25.00 mm to 25.02 mm
Shaft: 24.95 mm to 24.97 mm
Find the hole tolerance.
Solution:
A forged steel link of uniform diameter 40 mm at the center is subjected to axial force, varying from 60 kN compression to 180 kN tension. The ultimate tensile strength (Sut) is 600 MPa, the yield strength (Sy) is 420 MPa, and the endurance limit (Se) is 240 MPa. Calculate the factor of safety using Soderberg's criteria (up to 2 decimal places).
Solution:
Which of the following statements about the teeth profile of a spur gear is correct?
Solution:
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