Why must items to be soldered be cleaned just prior to the soldering process?

Why must items to be soldered be cleaned just prior to the  soldering process?
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1 Answer

Answer :

Solder will not adhere to dirty, greasy, or oxidized surfaces.
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Related questions

If a delicate component must be soldered into a circuit, the component may be protected from the heat of the soldering process by _____________. A. operating the soldering gun not more than 60 seconds at a time B. using a thermal shunt C. pre-oxidizing the leads to be soldered D. coating the leads to be soldered with a light oil film

Description : If a delicate component must be soldered into a circuit, the component may be protected from the heat of the soldering process by _____________. A. operating the soldering gun not more than 60 seconds at ... oxidizing the leads to be soldered D. coating the leads to be soldered with a light oil film

Last Answer : Answer: B

Flux aids in soldering by removing what from surfaces to be soldered?

Description : Flux aids in soldering by removing what from surfaces to be soldered?

Last Answer : Oxides.

When soldering a printed circuit board component, you should be careful to prevent damage by _________. A. quickly heating the joints, using a high wattage iron B. using the soldering iron tip sparingly C. using only acid cord solder D. applying mechanical pressure to the joints being soldered

Description : When soldering a printed circuit board component, you should be careful to prevent damage by _________. A. quickly heating the joints, using a high wattage iron B. using the soldering iron tip sparingly C. using only acid cord solder D. applying mechanical pressure to the joints being soldered

Last Answer : Answer: B

Should aluminum wire be cleaned prior to installing an aluminum terminal lug or splice?

Description : Should aluminum wire be cleaned prior to installing an aluminum terminal lug or splice?

Last Answer : No, it is done automatically by the petroleum abrasive compound that comes in the terminal or splices.

What type of flux must be used in all electrical and electronic soldering?

Description : What type of flux must be used in all electrical and electronic soldering?

Last Answer : Noncorrosive, nonconductive rosin fluxes.

What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?

Description : What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?

Last Answer : Adequate ventilation.

Define the metal solvent action that takes place when copper conductors are soldered together.

Description : Define the metal solvent action that takes place when copper conductors are soldered together.

Last Answer : The solder dissolves a small amount of the copper, which combines with the solder forming a new alloy; therefore, the joint is one common metal.

What is a major advantage of the crimped terminal over the soldered terminal?

Description : What is a major advantage of the crimped terminal over the soldered terminal?

Last Answer : Requires relatively little operator skill to install.

What is the appearance of a properly soldered joint?

Description : What is the appearance of a properly soldered joint?

Last Answer : Bright and shiny with no cracks or pits.

When a lead is soldered to a pad without passing through the board, it is known as what type of termination?

Description : When a lead is soldered to a pad without passing through the board, it is known as what type of termination?

Last Answer : On-the-board termination.

Why are solvents used in the soldering process?

Description : Why are solvents used in the soldering process?

Last Answer : To remove contaminants from soldered connections.

What purpose does flux serve in the soldering process?

Description : What purpose does flux serve in the soldering process?

Last Answer : It cleans the metal by removing the oxide layer and prevents further oxidation during the soldering

Why is steel wool NEVER used as an abrasive to clean soldering tools?

Description : Why is steel wool NEVER used as an abrasive to clean soldering tools?

Last Answer : The strands can fall into electrical equipment being worked on and cause short circuits.

What is an advantage of using a resistance soldering iron when soldering wire to a connector?

Description : What is an advantage of using a resistance soldering iron when soldering wire to a connector?

Last Answer : The soldering tips are hot only during the brief period of soldering the connection, thus minimizing the chance of burning the wire insulation or connector inserts.

A soldering gun should NOT be used on what components?

Description : A soldering gun should NOT be used on what components?

Last Answer : Electronic components, such as resistors, capacitors, and transistors.

What causes the nuts or screws that hold the tips on soldering irons and guns to loosen?

Description : What causes the nuts or screws that hold the tips on soldering irons and guns to loosen?

Last Answer : The heating and cooling cycles.

What happens if a soldering gun switch is pressed for periods longer than 30 seconds?

Description : What happens if a soldering gun switch is pressed for periods longer than 30 seconds?

Last Answer : It will overheat and could burn the insulation of the wire being soldered.

What should be done to a soldering iron tip that is pitted?

Description : What should be done to a soldering iron tip that is pitted?

Last Answer : File the tip until it is smooth and retin it.

State why a well-designed soldering iron is self-regulating

Description : State why a well-designed soldering iron is self-regulating

Last Answer : The resistance of its heating element increases with rising temperature, thus limiting the current flow.

Why are small-wattage soldering irons not used to solder large conductors?

Description : Why are small-wattage soldering irons not used to solder large conductors?

Last Answer : Although its temperature is as high as the larger irons, it does not have thermal inertia.

What does "tinning" mean in relationship to soldering?

Description : What does "tinning" mean in relationship to soldering?

Last Answer : The coating of the material to be soldered with a light coat of solder.

How should excess solder be removed from a hot soldering iron?

Description : How should excess solder be removed from a hot soldering iron?

Last Answer : By use of a cleaning cloth.

In soldering, what alloy changes directly from a solid state to a liquid state?

Description : In soldering, what alloy changes directly from a solid state to a liquid state?

Last Answer : Eutectic.

How do you prevent excessive heat buildup on an area of a board when soldering multilead components?

Description : How do you prevent excessive heat buildup on an area of a board when soldering multilead components?

Last Answer : Use a skipping pattern

What determines the shape and size of a soldering iron tip?

Description : What determines the shape and size of a soldering iron tip?

Last Answer : The type of work to be done.

What is the most common source of heat in electronic soldering?

Description : What is the most common source of heat in electronic soldering?

Last Answer : Conductive-type soldering iron.

Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Description : Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Last Answer : A. Pre-soldering and heat treatment

Is the Intel iMac's CPU socketed or soldered?

Description : Is the Intel iMac's CPU socketed or soldered?

Last Answer : I don't know technically what the case is (I suspect socketed as it's based on standard architecture) but it's not possible to upgrade the CPU, either by yourself and definitely any Apple service ... CPU upgrades are simply not allowed and Apple has made sure that it's not possible to do so.

Whose idea was it to make laptop adapters cords soldered on!

Description : Whose idea was it to make laptop adapters cords soldered on!

Last Answer : I got a new imitation Dell power cord off of eBay for the fraction of the price of the Dell one when mine went south. It is a pain in the butt when they break, but knowing where to buy a new one if this happens to break (which does seem most likely) makes it easier to live with. :)

In D.C. motor construction, the armature coils' ends are _______________. A. soldered to the commutator bar risers B. imbedded into core slots C. crimped together with brush pigtails D. spliced with the field windings

Description : In D.C. motor construction, the armature coils' ends are _______________. A. soldered to the commutator bar risers B. imbedded into core slots C. crimped together with brush pigtails D. spliced with the field windings

Last Answer : Answer: A

In actual applications, electrical connections to 'R1-R2' of figure 'A' and to 'R1-R2- R3' of figure 'B' shown in the illustration are made by ______________. EL-0092 A. soldered contacts B. spliced and taped connections C. slip rings and brushes D. solderless crimp-on connectors

Description : In actual applications, electrical connections to 'R1-R2' of figure 'A' and to 'R1-R2- R3' of figure 'B' shown in the illustration are made by ______________. EL-0092 A. soldered contacts B. spliced and taped connections C. slip rings and brushes D. solderless crimp-on connectors

Last Answer : Answer: C

A capacitor discolored due to excessive heat should be _____________. A. calibrated B. replaced C. cooled D. soldered

Description : A capacitor discolored due to excessive heat should be _____________. A. calibrated B. replaced C. cooled D. soldered

Last Answer : Answer: B

One of the following is a possible cause for a slow drift of frequency in a self-exited transmitter oscillator circuits resulting to a poor frequency stability. A. Loose shielding B. Heating of capacitor in the oscillator C. Poor soldered connections D. Faulty capacitor, resistor, tubes or resistors

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Description : Which of the following is one of the possible causes for a slow drift of frequency in a self exited transmitter oscillator circuits resulting to a poor frequency stability? A. Poor soldered connections ... , or antenna circuits D. DC and RF heating of resistors, causing then to change values.

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When culturing a pustule, the area must first be cleaned A. True B. False

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. How many times year cooling water must be cleaned 1. Once a year 2. Thrice a year 3. Twice a year 4. Four times a year

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In the preparation of an audit program, which of the following items is not essential? a. Assessment of inherent risk b. The preparation of a budget identifying the costs of resources needed c. A review of material from prior audits d. An understanding of controls established by management

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When should wires be twisted prior to lacing?

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Define soldering process and enlist any two applications.

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Carpet stain that just keeps getting bigger when cleaned?

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List three items of information normally included in the general description section of a specification sheet for a transistor.

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What two primary items determine the class of operation of an amplifier?

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A kit for cleaning floppy disk drives contains what two items?

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When computers use the cylinder method to store data on a hard disk pack, what three items make up the address that tells the computer where on a specific disk to store the data?

Description : When computers use the cylinder method to store data on a hard disk pack, what three items make up the address that tells the computer where on a specific disk to store the data?

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What items are you to check when working on a circuit breaker?

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The use of prophylactic antibiotics has become commonplace. Which of the following statement(s) is/are true concerning the prophylactic use of antibiotics? a. The appropriate use of prophylactic antibiotics must include the initiation of the agent prior to the surgical procedure b. Continuing the antibiotic into the postoperative period has led to improved results in antibiotic prophylaxis c. The prophylactic administration of broad-spectrum agents (third-generation cephalosporins) has been shown to be particularly advantageous d. The topical use of antimicrobial agents is of no advantage in the prophylactic setting

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