According to Unwin's formula, the diameter d of a rivet of plate of thickness t

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Question
According to Unwin's formula, the diameter d of a rivet of plate of thickness t is :
Options
A. d = 6.05 t
B. d = 1.5 t + 4
C. d = 5 t
D. d = t + 1.5

Correct Answer

d = 6.05 t

Strength of Materials problems

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4. An arch may be subjected to
Options
A. shear and axial force
B. bending moment and shear force
C. bending moment and axial force
D. shear force and thrust
E. thrust, shear force and bending moment.

5. While testing a cast iron beam (2.5 cm x 2.5 cm) in section and a metre long simply supported at the ends failed when a 100 kg weight is applied at the centre. The maximum stress induced is :
Options
A. 960 kg/cm²
B. 980 kg/cm²
C. 1000 kg/cm²
D. 1200 kg/cm².

9. Pick up the correct statement from the following :
Options
A. A ductile material has large plastic zone
B. A brittle material has no plastic zone
C. A rigid material has no plastic zone
D. All the above.

10. Pick up the correct statement from the following :
Options
A. The point through which the resultant of the shear stresses, passes is known as shear centre
B. In the standard rolled channels, the shear centre is on the horizontal line passing through and away from the C.G. beyond web
C. In equal angles, the shear centre is on the horizontal plane and away from the C.G., outside of the leg projection
D. In T-sections, the shear centre is at the C.G. of the section
E. All the above.

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