HT A School Silver Brazing Written Practice Exam

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• How many turns should the acetylene cylinder be opened for safe operation?
• Which operations utilize a carburizing flame?
• At what angle should the filler metal be fed into the face of the joint?
• What should never be aimed directly into the joint area during silver brazing operations?
• A slightly oxidizing flame is typically used to perform which operations?
• A backfire occurs when the flame momentarily burns back into the __________.
• What material is the braze welding filler metal primarily made from?
• What is the last step to be completed in silver brazing preparation?
• When only one part of a joined assembly is hot enough during brazing, what will happen to the filler metal?
• When in a molten state, where does the filler metal flow?
• What is a common mistake to avoid when performing silver brazing?
• What color are acetylene hoses?
• What happens to heat flow when filler metal is added?
• What is the purpose of flux in the silver brazing process?
• What color does the inner cone of an oxidizing flame appear?
• What is one disadvantage of silver brazing compared to other methods?
• What is the melting temperature range for silver brazing filler metals?
• If two pieces of metal are to be joined by silver brazing and are not in contact, how should each piece be treated?
• What is used to check the fit of the joint before brazing?
• What effect does proper cleaning have on the brazed joint?
• What type of flame should the torch be adjusted to during silver brazing?
• Which property of the flux is critical during the brazing process?
• Which factor is critical for ensuring good capillary action in brazing?
• What tests are commonly performed on brazed joints to ensure quality?
• Chemical elements that behave sometimes like metals and sometimes like nonmetals are often called ___.
• What happens if the pre-braze inspection is overlooked?
• In silver brazing, what is typically the characteristic of a properly cleaned metal surface?
• What happens to the pressure when you turn the regulator adjusting screw in to the right?
• What methods are used to apply heat during silver brazing?
• What role does the base metal surface cleanliness play in brazing?
• What is the melting temperature of braze welding filler metal?
• Which indicator shows the temperature of the base metal during brazing?
• To adjust from a neutral flame to a carbonizing flame, one should _________ acetylene and ________________ oxygen.
• Which of the following are acceptable financing options for silver brazing equipment?
• Which metals can commonly be joined using silver brazing?
• The color marking system assigns a particular metal to which type of identifier?
• What element is primarily excluded in the composition of nonferrous metals?
• In welding processes, what is the significance of the melting temperature?
• How can the strength of a silver brazed joint be tested?
• Can silver brazing be used for electrical applications?
• While using tip cleaners, one should use a straight ___ movement.
• How should pipe ends be aligned before fitting?
• The two gas tubes carry the gases to the tip, via the ____.
• How does silver brazing improve the integrity of joints?
• What is silver brazing most noted for in terms of joint integrity?
• What is a typical application for silver brazing?
• What are the two methods used in silver brazing?
• What safety measure should be taken when handling the acetylene cylinder?
• Which of the following can be a characteristic of ferrous metals?
• What step follows measuring and determining clearance in silver brazing preparation?
• What is the first step in the preparation for silver brazing?
• What does the term “thermal conductivity” refer to in brazed joints?
• If the flux turns black and does not reflect the flame, what does this indicate?
• What is necessary to ensure the integrity of a brazed joint?
• In which direction does heat flow?
• What color are hoses used for oxygen?
• What safety measures should be taken when silver brazing?
• Why is it important to support parts during the braze operation?
• What is the most frequently used joint design in silver brazing?
• What should be checked during the pre-braze inspection?
• After a pipe and fitting are fitted, how should one measure the clearances between the pipe outside and the fitting inside?
• Why is it necessary to understand the material properties of base metals before brazing?
• What should be done with excess metal that has been consumed according to the project's color marking?
• What is the typical silver content range in silver brazing alloys?
• What does silver brazing flux help prevent from entering the joint area?
• What does silver brazing allow in terms of joining dissimilar metals?
• What is the key role of the flame during silver brazing?
• At what temperature does silver brazing typically occur?
• What must be ensured when heating together two different metal components for silver brazing?
• How should the ends of pipes be prepared for joining during silver brazing?
• What does capillary action allow in the silver brazing process?
• A backfire is characterized by a loud ____________________.
• What is another function of silver brazing flux besides aiding molten filler metal?
• What should be done to the surface of the pipe before brazing?
• What is the importance of filler metal fluidity during brazing?
• Which outcome can be ensured by properly preparing and inspecting components before brazing?
• What is the effect of not using flux in silver brazing?
• During silver brazing, what effect does the composition of materials have on the process?
• What substance is burned in excess to produce an oxidizing flame?
• What is the primary difference between brazing and welding?
• In silver brazing, what happens if flux remains in the joint area?
• What is required to determine if enough filler metal has been fed into the joint?
• Can silver brazing be performed on thin-walled sections of metal?
• Conversely, what is the result of turning the regulator adjusting screw out to the left?
• To allow gas to press from the regulator high-pressure chamber to the low-pressure chamber, what should you do with the regulator adjusting screw?
• Why is the boiling point of the brazing filler important?
• What is the purpose of the milky stage of flux?
• What environmental safety considerations should be taken during brazing?
• What is the ideal temperature for silver brazing filler metals?
• Which statement is true regarding the temperature characteristics of copper-based filler metals?
• How can thermal expansion mismatch be managed in brazed assemblies?
• Why is preheating sometimes recommended before brazing?
• The oxy/acetylene welding torch is used to ___ the oxygen and acetylene gases in the proper proportioned, and to control the ____ of these gases burned at the tip.
• After removing surface oxides, what should be the next step in the preparation process?
• Why is cleaning metal surfaces important before brazing?
• What is the effect of overheating the joint during silver brazing on the flux?
• What does it mean for a filler metal to be "low-fuming" during brazing?
• What part of the flame envelope should be touching the base metal during silver brazing?
• What does flux aid in regarding molten filler metal?
• What kind of equipment is needed for silver brazing?
• To obtain the maximum permissible clearance, what should be done with the difference between the pipe and the fitting?
• What properties are important in the selection of silver brazing filler metals?
• What is the characteristic of back seeded valves in oxygen cylinders?
• What does "joint strength" depend on in brazing?
• In silver brazing, why is it important to keep the joint area free from contaminants?
• Can silver brazed joints withstand high pressures?
• What are metals composed primarily of iron classified as?
• In silver brazing, which type of flame is used to heat the base metals?
• What puts the heat into the joint to melt the filler metal during silver brazing?
• What is the primary advantage of silver brazing?
• What is the term for the process by which heat flows through metal?
• Which two major fields are metals divided into?
• What does "dissimilar metals" refer to in brazing?
• Which grades of silver braze filler metal are typically used by a heat treater in the navy?
• In brazing, what does a clean surface contribute to?
• In a flashback, where does the flame burn into or beyond?
• When joining steel and copper, how does the steel's heat absorption compare to that of copper?
• Which part of the flame should never come into contact with the base during brazing?
• What can corrosion in the joint lead to if not properly addressed?
• What is a silver alloy's "liquidus" temperature?
• Is it possible to re-braze a joint? If so, how?
• What does the size of the opening between solids affect in capillary attraction?
• In a silver brazing process, why is more heat required for the copper part?
• What is the recommended state for the filler metal to ensure proper flow between solids?
• What information do regulator pressure gauges provide?
• What is the role of flux in brazing?
• What is a common consequence of poor joint clearance in brazing?
• What role does metallurgical bonding play in brazing?
• In the continuous marking system, where is the marking stenciled on the stock?
• What type of filler metals are commonly used in silver brazing?
• For effective brazing, what should the distance between metals be to facilitate flow?
• Which of the following is part of ensuring a quality brazed joint?
• What type of valve is found on the oxygen cylinder, and why should it be opened all the way?
• Which metals have a greater variability in composition and alloying elements?
• What role does temperature control play in silver brazing?
• What can improper alignment of components lead to during brazing?
• What could excessive flux residue indicate after brazing?
• In brazing, achieving proper alignment of components is necessary to:
• The welding torch tip consists of two components: the ___ and the ___.
• What is one advantage of using silver as a filler metal in brazing?
• What is the term for liquid flowing into the narrow clearances between two solids?
• What is a typical consequence of improper cleaning before brazing?
• What is the primary problem when controlling heat in silver brazing?
• What should be the motion used during preheating to ensure uniform heating?
• What should you immediately do when a flashback occurs?
• How can preheating affect the flow of brazing filler metal?
• Why might one choose induction heating for silver brazing?
• What might happen if the thin part of a joint is heated excessively while brazing?
• For capillary attraction to occur, what must be done to the base metals?
• What are the three stages of flux when heated?
• How can the proper joint clearance be determined for brazing?
• The pipe expander is a tool used to ___ the end of the pipe and __ the walls to ensure the correct dimension between the pipe outside and the fitting inside.
• The body of the welding torch contains how many needle valves?
• If a backfire persists, what should be checked on the torch?
• What is the melting temperature range for silver brazing filler metals in relation to the base metals?
• What condition must be true about the opening between base metals for effective capillary attraction?
• What is a common application of silver brazing?
• What is the characteristic of silver brazing filler metals?
• What is the purpose of the pre-braze inspection process in brazing?
• What substance is recommended for cleaning surfaces before brazing?
• The welding torch consists of two components: the ___ and the ____.
• How does the brazing process affect the thermal properties of the metals involved?
• Why is alignment critical in a brazed joint?
• In good practice, the length of a lap joint must be at least how many times the thickness of the base metals?
• Which property of filler metal is essential for effective brazing at lower temperatures?
• What sound typically accompanies a flashback?
• What characteristics can indicate a poor quality brazed joint?
• What is a key factor affecting the lifespan of a brazed joint?
• In a joint that requires both heavy and thin sections, what should be monitored to prevent damage?
• Why is it essential to apply heat to the lap joint during brazing?
• What is the purpose of a brazing schedule?
• What is essential to do after cleaning the surfaces of pipes before joining them?
• In the face feed method of silver brazing, into what area is the filler metal fed?
• Which of the following is necessary to ensure a proper fit for silver brazing?
• What is the overall goal of the pre-braze inspection process?
• Nonferrous metals are primarily composed of which type of elements?
• What are the two types of valves that need to be closed when a flashback occurs?
• What type of flux is silver brazing flux classified as?
• What aspect of components does the pre-braze inspection help to verify?
• What state must the filler metal be in for capillary attraction to occur?
• Which factor can contribute to corrosion in brazed joints?
• What is the potential impact of using improper flux?
• What form does silver brazing flux typically come in?
• How does silver brazing differ from soldering?
• Why is it essential to clean components before brazing?
• Which factor is essential for the flow of filler metal during the brazing process?
• What is the process of silver brazing primarily used for?
• How does increasing the pressure in the regulator affect the flow of gas?
• Why is a slow, constant, circular sweeping motion recommended during preheating?
• At what temperature range are nonferrous metals generally processed?
• What does silver brazing flux remove from the surface before brazing?
• How does joint fit-up affect the brazing process?
• How does heat transfer differ between steel and copper during the joining process?
• What must be done to the joint area after it has cooled?
• How does the cooling rate affect a brazed joint?
• Which factor is critical for achieving a strong brazed joint?
• During which phase of the brazing process is inspection most crucial?
• What is the purpose of post-brazing cleaning?
• Can silver brazing be performed in a vacuum?
• What are common joint designs used in silver brazing?
• What is the direction of flow for the filler metal and the flux when joining pieces?
• What describes the length of a carburizing flame's white envelope in relation to the inner cone length?
• What is the purpose of using flux in silver brazing?
• Before applying flux, what preparatory step should you take concerning the pipe ends?