Design Questions Set 42:
What is the mean stress for completely reversed fluctuating stress?
Solution:
Find the load on the central idler if the net load is 140.887 kgf.
Solution:
What does the number 6 indicate in the class of wire rope 6 x 37 (18/12/6/1)?
Solution:
The formula used to calculate the shear strength of a butt weld is:
Solution:
If the length of the weld is L and the leg size is H, then the area of the throat will be given by:
Solution:
What is the term used to describe the time it takes for the workpiece to be heated to the required temperature during welding?
Solution:
Young’s moduli of two wires A and B are in the ratio 7:4. Wire A is 2m long and has radius R. Wire B is 1.5 m long and has a radius of 2mm. If the two wires stretch by the same length for a given load, then the value of R is close t
Solution:
Determine the width of the cotter used in the cotter joint connecting two rods subjected to an axial load of 50 kN, if the permissible shear stress in the cotter is 70 N/mm2.
Take the thickness of the cotter as 12 mm. (Round off the result to the next integer)
Solution:
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
Solution:
Find the breaking strength of a 6 x 37 rope for a hoisting mechanism, given the following data:
- Load on tension per fall is 2025 kgf
- Tensile strength of wire is 180 kgf/mm²
- Stress factor or design factor is 6
- Assume d/Dmin = 1/23
Solution:
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