The rivets in outer row of longitudinal boiler shell butt joint are subjected to double shear.
a) True
b) False
Answer: b
Explanation: Rivets in middle and inner row are subjected to double shear and in outer row are subjected to single shear.
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?a) Lozenge Jointb) Lap Jointc) Star Jointd) Darwin’s Joint
Calculate the thickness of the strap required in longitudinal butt joint if pitch of the rivets is 150mm and diameter of rivets 30mm. Also thickness of plate is 20mm.a) None of the listedb) 16.7mmc) 13.4mmd) 10.2mm
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?a) 2Pb) P/2c) Pd) None of the listed
PL to torsional 13!1? 10. The rivet head used for the boiler plate riveting is usually A. Snap head B. pan head C. counter sunk head D. conical head Answer: 11. According to UnWin's formula, the relation between diameter of rivet hole (d) and thickness of plate (1) is given by (units in mm) A. der B. d=1.6V C. d = 21 D. d=61 Answer: 12. A line joining the centres of rivets and parallel to the edge of the...
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.a) 45%b) 85%c) 90%d) 100%
A triple riveted butt joint with equal double cover plates (zig-zag riveting) is used for the longitudinal joint of a Lancashire boiler of 2.5 m internal diameter. The working steam pressure is 1.12 N/mm2 and the efficiency of the joint is 85 per cent. Calculate the plate thickness for mild steel of 460 MPa ultimate tensile strength. Assume ratio of tensile to shear stresses as 7/6 and factor of safety 4. The resistance of the rivets in double shear is...
If number of rivets subjected to single shear per pitch length is 2 and those subjected to double shear per pitch length are 3, then find the shear resistance of rivets is diameter of rivets is 20mm and permissible shear 60N/mm².a) None of the listedb) 146.1kNc) 150.7kNd) 140.2kN
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.a) None of the listedb) 210mmc) 105mmd) 52.5mm
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.a) 21.2kNb) 42.4kNc) 84.8kNd) None of the listed
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.a) 84.8kNb) 468.8kNc) 384kNd) None of the listed