Welded and Riveted Joints topics include: Various concepts which include welded joints, butt joints, fillet joints, riveted joints, various joints terminology and lap joints based on eccentricity principle. Welded and riveted joints are both ways to join pieces together. Welded joints: A permanent method that uses heat to fuse metal pieces together. Welded joints are stronger and more rigid than riveted joints, and produce a smooth finish. Welded joints are also stronger and more rigid than riveted joints, but can fail due to strong vibrations.  Here are some more differences between... Show more

Welded and Riveted Joints topics include: Various concepts which include welded joints, butt joints, fillet joints, riveted joints, various joints terminology and lap joints based on eccentricity principle.

Welded and riveted joints are both ways to join pieces together.
Welded joints: A permanent method that uses heat to fuse metal pieces together. Welded joints are stronger and more rigid than riveted joints, and produce a smooth finish. Welded joints are also stronger and more rigid than riveted joints, but can fail due to strong vibrations. 

Here are some more differences between welded and riveted joints:
Semi-permanence: Riveted joints are semi-permanent, meaning they can be cut and removed.
Seams: Welding creates seamless joins, whereas riveting leaves visible seams.
Inspection: Riveted joints can be visually inspected to ensure the components are secure, while welded joints must be tested with a machine or device.
Weight: Riveted joints add rivets to the assembly, which increases the weight.
Startup cost: Riveting often has a lower startup cost and can be economical for smaller projects or one-off tasks.
Applications: Welding has a wide range of applications, including joining thin plates in automobile industries and pipes in refineries. Riveted joints are used to fasten sheet metal and form rolled metal, and are typically used in pressure vessels, gas cylinders, and boilers. 

Related Test: Welding Practice Test: Welding and Related Processes

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Machine Design Practice Test: Welded and Riveted Joints

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25 Questions

1. For the following welded joint l₁y₁=l₂y₂.

MaybeTrueFalseDon't know

2. Calculate the diameter of the rivets if permissible shear stress is 60N/mm². Bolts are separated by 100mm and force P=30kN.

10mm13mm15mm12mm

3. Calculate the diameter of the rivets by crushing consideration if permissible compression stress in rivets is 120N/mm², thickness of plate 3mm and P=15kN.

8.6mm10.4mm9.2mm11.5mm

4. Calculate the diameter of the rivets by shear considerations if permissible shear stress in rivets is 60N/mm² and P=15kN.

6mm7mm9mm8mm

5. The two welds shown in the figure experience equal resisting force?

Don't knowTrueMaybeFalse

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 pitch of the rivets.

52.5mmNone of the listed105mm210mm

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 tensile strength of rivets along C-C.

590.4kNNone of the listed772kN336kN

8. If length of weld is l and leg h, then area of throat can be given by

hlNone of the listed1.414hl0.707 hl

9. Convex weld is generally preferred over normal weld.

MaybeTrueFalseDon't Know

10. Forge welding involves heating of parts to elastic stage and joint is prepared by impact force.

Heating is done up to boiling pointNone of the listedNo, it is done up to plastic stageYes

11. A strap is used in a lap joint which is riveted to each of the two plates.

Don't KnowFalseTrueMaybe

12. Find the bending stress in the top weld is if thickness of weld is t. Given P=15kN and e=120mm.

None of the listed200/t230/t360/t

13. In gas welding which of the following is generally used?

Oxygen-HydrogenOxygen-Hydrogen or Oxygen-AcetyleneNone of theseOxygen-Acetylene

14. 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?

60mm50mm70mm65mm

15. The bracket welded to the vertical plate by means of two fillet welds. Calculate the bending stress in the welds if P=40kN, leg=4mm and e=400mm.

34N/mm²24 N/mm²None of the listed44 N/mm²

16. Among flat head and snap head rivet, which has the higher head height?

There is no such relationSnapFlatEqual

17. Calculate width of the band if permissible tensile stress is 80N/mm². Force P=15kN and diameter of the rivet can be taken as 9mm. Given thickness=3mm

76.66mm79.5mm80.5mm54.6mm

18. Testing the ultimate strength of the weld falls in nondestructive examination.

Don't KnowMaybeFalseTrue

19. Find the length of weld 1 required to with stand the load of 100kN. Permissible shear stress in weld is 70kN/mm².

102.22mm132.4mm70.16mmNone of the listed

20. Two plates each of thickness t are to be riveted together. If length of shank portion necessary to form the closing head is a, then length of rivet shank is given by?

2(t+a)Can’t be determined2t+at+2a

21. Rails in the field are generally welded by using

Gas weldingThermit weldingElectric arc weldingForge welding

22. Themit consists of a finely divided mixture of iron oxide and copper.

Don't KnowTrueMaybeFalse

23. Are the bolts 2 and 3 subjected to same magnitude of force?

Don't knowMaybeFalseTrue

24. Riveting is not recommended for aluminium alloys.

TrueMaybeFalseDon't Know

25. With reference to the following figure, a plate, 75mm wide and 10mm thick, is joined with another plate as shown. The permissible tensile and shear stress in the welds are 50/mm² and 40N/mm². Determine the required length of each parallel fillet weld if length of transverse weld is 40mm.

11mm8mm9mm7mm