Machine Design Questions and Answers – Failure in Rivets

This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Rivets Analysis”.

1. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the shear resistance of 1 rivet along A-A.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 21.2kN
b) 42.4kN
c) 84.8kN
d) None of the listed
View Answer

Answer: c
Explanation: P=2x[τ x πd²/4].

2. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the tensile strength of rivet along A-A.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 2592kN
b) 864kN
c) 216kN
d) 432kN
View Answer

Answer: d
Explanation: Strength=(w-d)xtxσ.

3. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the tensile strength of rivets along B-B.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 84.8kN
b) 468.8kN
c) 384kN
d) None of the listed
View Answer

Answer: b
Explanation: To fail along B-B, rivet in outermost row must undergo shear failure. Strength = (w-2d)x σ x t + 1xP(shear) = (300-60)x80x20/1000 + 84.8.
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4. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the tensile strength of rivets along C-C.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 772kN
b) None of the listed
c) 336kN
d) 590.4kN
View Answer

Answer: d
Explanation: To fail along C-C, rivets in outer rows must undergo shear failure. Strength= (w-3d)x σ x t + 3xP(shear) = (300-90)x80x20/1000 + 3×84.8.

5. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate efficiency of the joint.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 45%
b) 85%
c) 90%
d) 100%
View Answer

Answer: c
Explanation: Strength along A-A, B-B and C-C are 432kN, 468.8kN and 590.4kN and strength of solid plate=wσt=480kN. Lowes is along AA. Hence efficiency=432/480.
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6. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the crushing resistance of 1 rivet.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 1153kN
b) 108kN
c) 96kN
d) 576kN
View Answer

Answer: c
Explanation: P=dtσ= 30x20x160=96kN.

7. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the pitch of the rivets.
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) None of the listed
b) 210mm
c) 105mm
d) 52.5mm
View Answer

Answer: c
Explanation: m+p+p+m=w where m=1.5d.
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8. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². The type of arrangement shown is?
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) Lozenge Joint
b) Lap Joint
c) Star Joint
d) Darwin’s Joint
View Answer

Answer: a
Explanation: Lozenge joint is other name of diamond shape joint.

9. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². If circumferential stress is P, then longitudinal stress in the pressure vessel is?
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 2P
b) P/2
c) P
d) None of the listed
View Answer

Answer: b
Explanation: Circumferential stress=2x longitudinal stress.
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10. Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². If width of plate=80mm and diameter of rivets 10mm, then pitch will be?
Find shear resistance of 1 rivet along A-A if shear & compression are 80 N/mm²,60 N/mm²
a) 65mm
b) 60mm
c) 50mm
d) 70mm
View Answer

Answer: c
Explanation: p+2m=w or p+2×1.5×10=80.

Sanfoundry Global Education & Learning Series – Machine Design.
To practice all areas of Machine Design, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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