IEC lesson 105 HW Questions with well explained answers

Ladders should extend at least ___ feet above the landing for easy access. - Answer-3 Damaged cords on power tools should be ___. - Answer-replaced All circuit wires should be considered ___ until tested. - Answer-energized (live) While standing in water you should ___. - Answer-never use power tools You should ___ oil, grease, or water spills. - Answer-immediately clean up Electricians should use metal ladders and wear metal hard hats. - Answer-false F to C - Answer-(F - 32) * 5 / 9 C to F - Answer-(C * 9/5) + 32 Which circuit has a higher resistance during the summer? Both circuits have the same size wire, are the same length, and use the same conductor material - Answer-Circuit #1 is run in conduit on the roof of a building If the same size wire is used for a circuit, which of the circuits below has the greater resistance? - Answer-Circuit #2: 300' long Knowing that aluminum conductors have a higher resistance than silver-plated copper conductors of the same size and length, which has the higher K value? - Answer-aluminum Power is measured in ___. - Answer-wattsA circuit is to be run to a parking lot light. The blueprints call for you to run 8 AWG wire that has a diameter of .128 inches. However, you ran #10 wire that has a diameter of .116 inches. You have ___ the total circuit resistance. - Answer-increased Compressed gas cylinders should be opened slowly to prevent ___. - Answer-valve damage Platform planks should overlap supports not less than ___ inches nor more than ___ inches and should be secured from shifting. - Answer-6 - 12 If current does not flow in a circuit, the circuit is said to be ___. - Answer-open The abbreviation or symbol used to represent the unit of measurement for power is ___. - Answer-W On any project, the door swing is very important in selecting where to put your switches. Door swing should always be determined by referring to the ___ plans. - Answer-architectural