List of top Design of Steel Structures Questions on Welded Connections asked in GATE CE

Two steel plates are to be connected together by a 5 mm fillet weld of length 150 mm to transfer a design load. If the size of the fillet weld used to connect the same two plates is changed to 6 mm, the weld length (in mm) needed for transferring the same design load is (in integer).

Consider the fillet-welded lap joint shown in the figure (not to scale). The length of the weld shown is the effective length. The welded surfaces meet at right angle. The weld size is 8 mm, and the permissible stress in the weld is 120 MPa. What is the safe load $P$ (in kN, rounded off to one decimal place) that can be transmitted by this welded joint? 

Two plates are connected by fillet welds of size $10$ mm and subjected to tension $P=275$ kN (factored). Plate thickness $=12$ mm. Steel: $f_y=250$ MPa, $f_u=410$ MPa. Workshop welding with partial safety factor. As per IS 800:2007 (Limit State), what is the minimum length (in mm, rounded off to the nearest higher multiple of $5$ mm) required of each weld to transmit $P$?} 

Consider the fillet-welded lap joint shown in the figure (not to scale). The length of the weld shown is the effective length. The welded surfaces meet at right angle. The weld size is 8 mm, and the permissible stress in the weld is 120 MPa. What is the safe load $P$ (in kN, rounded off to one decimal place) that can be transmitted by this welded joint?