Question 408Electricity & Electronics - Assistant Engineer

The correct answer is A) L1 10A line fuse is blown. This is because with the power available indicator light off, the oven on indicator light off, and only elements 6 and 7 producing heat, it indicates a loss of power on one of the line fuses, most likely the L1 10A line fuse. The other line fuses (L2 and L3) would need to be intact for the other elements to be producing heat. The other options are incorrect because a blown L2 or L3 line fuse would result in a different pattern of heating elements, and a blown L1 control fuse would typically cause all the indicator lights and heating elements to be off, not just some elements.