Self-Test B-6.3: Describe the Arc Welding Process and Equipment

Complete Self-Test B-6.3 and check your answers.

1. Which of the following terms describes the mixture of melted electrode and melted parent metal created by the welding current flowing through the electrode and across the arc?
   1. SMAW
   2. The weld deposit
   3. The short circuit
   4. The workpiece
2. Which term describes the welding machine turned on but no arc established?
   1. Ohm’s Law
   2. Short-circuit voltage
   3. Closed-circuit voltage
   4. Open-circuit voltage
3. In shielded metal arc welding, metals are fused by the heat from an electric arc that is maintained between the surface of the workpiece and which of the following electrodes?
   1. Covered electrode
   2. Bare electrode
   3. Neutral electrode
   4. Carbon electrode
4. In SMAW, what purpose does the electrode’s flux coating serve?
   1. Keep the arc stable
   2. Keep the arc concentracted on the weld
   3. Provide the sheilding gases
   4. All of the above
5. Which term describes the electrical pressure or voltage in a welding circuit after the arc has been struck?
   1. Open-circuit voltage
   2. Line voltage
   3. Arc voltage
   4. Electrode voltage
6. Which of the following is not a consideration when you select a polarity?
   1. The type of coating material on the electrodes
   2. The temperature of the workpiece
   3. The welding position
   4. The types of material to be welded
7. Which of the following best describes direct current?
   1. Flows consistently from the positive to the negative pole
   2. Flows first from the negative to the positive pole, and then from the positive to the negative pole
   3. Flows consistently from the negative to the positive pole
   4. Is more dangerous than alternating current
8. Besides the jaw type, what is the most common type of stinger?
   1. Spring type
   2. Twist-head type
   3. Clamp type
   4. Jib type
9. What is the appropriate course of action if the cable connection to the electrode holder contains frayed or broken strands of wire?
   1. Repair the connection with electrical tape
   2. Put the cable permanently out of service
   3. Cut off the damaged end and make a new connection
   4. Turn the cable end for end
10. What is a probable result of using an electrode with broken flux coating?
    1. Slag inclusions
    2. Hard spots
    3. Porosity
    4. Lack of fusion
11. Which of the following electrodes need to be stored in an electrode oven?
    1. All mild steel electrodes
    2. Low-hydrogen, hardsurfacing, and special alloy electrodes
    3. Mild steel, low-hydrogen, and special alloy electrodes
    4. Mild steel, hardsurfacing, and special alloy electrodes
12. Which of the following terms describe common portable grinders?
    1. Angel grinders
    2. Bevel grinders
    3. Curved grinders
    4. Disk grinders
13. Which of the following PPE is required when using a portable grinder?
    1. Leather gloves
    2. A fireproof apron
    3. Eye protection
    4. A hard hat

Answer Key: Self-Test B-6.3 is on the next page.