AME 8 End of Unit – SVE Study

AME 8 End Of Unit Quiz

1 / 12

What is the process of oxy-acetylene welding?

A. Oxy-acetylene welding involves the use of a high-frequency electric arc to melt and join metal surfaces.

B. Oxy-acetylene welding uses a mixture of oxygen and acetylene gases to produce a high-temperature flame that melts the metal surfaces, allowing them to fuse together.

C. Oxy-acetylene welding is done by applying a heated iron electrode to the metal surfaces to weld them together.

D. Oxy-acetylene welding employs a laser beam to focus intense heat on metal surfaces to achieve fusion.

2 / 12

What is lack of fusion in a weld produced using the covered electrode welding process?

D. A defect involving visible fissures or separations in the weld metal, often caused by rapid cooling or high stresses.

C. A defect where non-metallic materials, such as slag or oxide, are trapped within the weld metal, compromising the weld's strength and integrity.

B. A defect characterized by trapped gas bubbles within the weld metal, which leads to a porous structure and rough surface appearance.

A. A defect where there is inadequate bonding between the weld metal and the base metal, or between adjacent weld passes, resulting in a gap or separation that weakens the weld.

3 / 12

What are inclusions in a weld produced using the covered electrode welding process?

B. Defects characterized by visible gas bubbles within the weld metal, resulting in a porous structure and rough surface appearance.

A. Defects where non-metallic materials, such as slag or oxide, are trapped within the weld metal, leading to weakened weld strength and potential for failure.

D. Defects where the weld metal exhibits excessive spatter, causing irregular droplets of metal around the weld area.

C. Defects where there is a visible gap or separation between the weld metal and the base metal, indicating poor fusion or incomplete penetration.

4 / 12

Question:

Which welding/brazing/soldering process is best suited for attaching a brass flange to a stainless steel pipe, and why?

A. Brazing: Uses a filler metal with a lower melting point than the base metals, which can effectively join brass and stainless steel without melting the base materials and provides a strong, durable joint.

C. MIG Welding: Suitable for high-speed welding but may not be ideal for joining brass and stainless steel due to differences in material properties and potential issues with spatter and heat control.

B. TIG Welding: Provides precise control and is effective for welding stainless steel but may not be ideal for brass due to differences in melting points and potential issues with joint integrity.

D. Soldering: Utilizes a low-temperature filler metal that may not provide the necessary strength or durability for attaching a brass flange to a stainless steel pipe.

5 / 12

What is the TIG welding process?

A. TIG welding (Tungsten Inert Gas welding) involves using a tungsten electrode to create an electric arc between the electrode and the workpiece, with the weld area protected by an inert gas, usually argon or helium. The process may or may not include a filler rod, which is added separately to the weld pool.

D. TIG welding utilizes a rotating arc between a copper electrode and the workpiece, with the weld area shielded by a liquid flux, which helps to clean and protect the weld zone during the process.

B. TIG welding uses a consumable electrode that is continuously fed into the weld pool, while the workpiece is shielded by a combination of carbon dioxide and oxygen gases to facilitate the weld.

C. TIG welding involves melting the workpiece with a high-powered laser while simultaneously feeding in a solid filler material, with the weld shielded by a nitrogen gas to protect it from contamination.

6 / 12

What are three advantages of using steel in vessel construction?

A. High strength-to-weight ratio, good resistance to corrosion, and lower material cost compared to aluminum.

B. Excellent weldability, high structural strength, and cost-effectiveness for large-scale construction.

D. High resistance to impact damage, low maintenance requirements, and superior thermal insulation properties.

C. Lightweight, excellent thermal conductivity, and ease of machining.

7 / 12

What maintenance should be carried out to ensure the continued structural integrity of a vessel with an aluminum superstructure attached to a steel hull?

D. Continuous monitoring of temperature changes, ensuring that the aluminum superstructure is always kept at a specific temperature range to avoid expansion issues.

B. Frequent repainting of the aluminum superstructure only, ensuring that the steel hull is left uncoated to maintain natural corrosion resistance.

A. Regular inspection and cleaning of joints to prevent galvanic corrosion, application of protective coatings to both aluminum and steel surfaces, and periodic replacement of anodes if used for cathodic protection.

C. Routine checks for structural damage to the aluminum superstructure, replacing all steel components every few years, and avoiding any contact with seawater.

8 / 12

What is a crater defect in a weld produced using the covered electrode welding process?

C. A defect where the weld metal has not properly fused with the base metal, resulting in a visible gap or separation along the weld joint.

D. A defect where the weld exhibits a rough, uneven surface texture due to contamination or inconsistent electrode feed during the welding process.

A. A defect where a small, deep depression forms at the end of the weld bead due to improper stopping of the welding arc, leading to a weakened area that can be prone to cracking.

B. A defect characterized by a series of small, raised areas along the weld bead caused by excessive heat or incorrect electrode angle during welding.

9 / 12

What are three disadvantages of using aluminum in vessel construction?

B. Greater weight than steel, poor weldability, and susceptibility to high temperatures.

C. Reduced impact resistance, high thermal expansion, and complex recycling process.

A. Limited resistance to saltwater corrosion, higher material cost, and lower structural strength compared to steel.

D. Limited availability, higher maintenance requirements, and reduced fatigue resistance compared to other metals.

10 / 12

Which welding/brazing/soldering process is best suited for attaching a stainless steel handrail to a steel hull, and why?

D. Soldering: Utilizes a low-temperature filler metal and is generally not suitable for structural applications like attaching a handrail to a steel hull due to its lower strength and durability.

B. MIG Welding: Suitable for high-speed welding and can handle different materials but may require careful control of parameters to avoid issues with spatter and heat, which might be less ideal for stainless steel and steel combinations.

A. TIG Welding: Provides precise control and produces clean, high-quality welds with minimal spatter, making it ideal for welding stainless steel to steel due to its ability to handle different materials and produce strong, clean joints.

C. Brazing: Uses a filler metal with a lower melting point than the base metals, but might not be as strong or durable for critical structural applications like handrails compared to welding.

11 / 12

What is lack of penetration in a weld produced using the covered electrode welding process?

D. A defect where there are visible fissures or separations in the weld metal, often caused by rapid cooling or high stresses.

A. A defect where the weld metal does not fully penetrate the base metal, resulting in a shallow weld and poor fusion, which weakens the joint.

C. A defect where non-metallic materials, such as slag or oxide, are trapped within the weld metal, leading to reduced weld strength and potential for failure.

B. A defect characterized by the formation of gas bubbles within the weld metal, leading to a porous structure and rough surface.

12 / 12

What surface preparation is required for gas metal arc welding (MIG) of mild steel, and why?

D. The surface should be slightly heated to improve the flow of the molten metal and enhance weld strength.

A. The surface should be clean and free of rust, paint, oil, and other contaminants to ensure proper electrical contact and strong welds.

B. The surface should be roughened using abrasive tools to increase adhesion, as MIG welding does not require a clean surface.

C. The surface should be coated with a thin layer of protective wax to prevent oxidation during welding.

Your score is

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Question:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation:

Correct Answer:

Explanation: