1. which of the following mathematical computations is wrong?\na. (56 - 19) + 16 = 53\nb. (57 - 20) + 17 =…

1. which of the following mathematical computations is wrong?\na. (56 - 19) + 16 = 53\nb. (57 - 20) + 17 = 54\nc. (58 - 21) + 18 = 55\nd. (58 - 22) + 19 = 56\n\n2. a 3/32\ diameter electrode is equivalent to:\na. 1.6 mm\nb. 2.4 mm\nc. 3.2 mm\nd. 4.0 mm\n\n3. the tensile strength of a e7018 electrode.\na. 70000 psi\nb. 70000 cfh\nc. 70000 g/in²\nd. 70 kg/in²\n\n4. which of the following materials will not conduct flow of electricity?\na. iron powder\nb. aluminum foil\nc. wet safety shoes\nd. none of the above\n\n5. the primary purpose of insulation in welding cables is to\na. protect the wire from deterioration from the sun\nb. provide flexibility\nc. provide strength\nd. prevent electrocution

1. which of the following mathematical computations is wrong?\na. (56 - 19) + 16 = 53\nb. (57 - 20) + 17 = 54\nc. (58 - 21) + 18 = 55\nd. (58 - 22) + 19 = 56\n\n2. a 3/32\ diameter electrode is equivalent to:\na. 1.6 mm\nb. 2.4 mm\nc. 3.2 mm\nd. 4.0 mm\n\n3. the tensile strength of a e7018 electrode.\na. 70000 psi\nb. 70000 cfh\nc. 70000 g/in²\nd. 70 kg/in²\n\n4. which of the following materials will not conduct flow of electricity?\na. iron powder\nb. aluminum foil\nc. wet safety shoes\nd. none of the above\n\n5. the primary purpose of insulation in welding cables is to\na. protect the wire from deterioration from the sun\nb. provide flexibility\nc. provide strength\nd. prevent electrocution

Answer

Answer:

  1. D. (58 - 22) + 19 = 56
  2. B. 2.4 mm
  3. A. 70000 psi
  4. D. None of the above
  5. D. prevent electrocution

Explanation:

1.

Step1: Calculate (58 - 22) + 19

First, 58 - 22 = 36, then 36+19 = 55, not 56.

2.

Step1: Convert 3/32 inches to mm

We know 1 inch = 25.4 mm. So $\frac{3}{32}\times25.4=\frac{76.2}{32}= 2.38125\approx2.4$ mm.

3.

Step1: Recall E7018 electrode tensile - strength

The tensile strength of an E7018 electrode is 70000 psi.

4.

Step1: Analyze conductivity of materials

Iron powder and aluminum foil are conductors. Wet safety - shoes can also conduct electricity due to the moisture, so none of them will not conduct electricity.

5.

Step1: Understand insulation purpose

The primary purpose of insulation in welding cables is to prevent electrocution by preventing the flow of electricity to unintended parts or people.