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
Description : Why is it a poor practice to use a high wattage soldering iron when soldering or desoldering components on a printed circuit board? A. The circuit board will blister and warp. B. The foil wire bonded ... board has a low melting temperature. D. The solder is kept to a dull heat dissipating finish.
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.
Description : How should excess solder be removed from a hot soldering iron?
Last Answer : By use of a cleaning cloth.
Description : Hello, I'm looking for someone who can solder, I need to solder up to 3.5 mm Jack cable, thank you
Last Answer : Almost anyone can do it, if possible. or anyone doing something in electronics
Description : What is the type of solder that would be used in hard soldering?
Last Answer : Need answer
Description : When troubleshooting an electronic circuit, a cold solder joint can be located with the aid of an ohmmeter. Once the problem has been located, you should _________________. A. reheat the circuit in an ... a soldering tool and recheck with an ohmmeter D. do nothing as this is the normal condition
Last Answer : Answer: C
Description : Use of flux during soldering is done to (A) Increase fluidity of solder by lowering its melting temperature (B) Prevent oxide formation (C) Wash away surplus solder (D) Full up the joint gap
Last Answer : (B) Prevent oxide formation
Description : What does the wattage rating of a resistor indicate?
Last Answer : Its ability to dissipate heat
Description : what should be the minimum wattage ratings of R 3 and R 5 ?
Last Answer : R3 = 2 watts; R5 = 6 watts.
Description : What is the tin-lead alloy percentage of solder used for electrical connectors, splices, and terminal lugs?
Last Answer : 60-percent tin and 40-percent lead (60/40 solder).
Description : What two metals are used to from soft solder?
Last Answer : Tin and lead.
Description : What causes a "fractured solder" joint?
Last Answer : Movement of the parts being soldered while the solder is cooling.
Description : Why should wire be stripped 1/32 inch longer than the depth of the solder barrel?
Last Answer : To prevent burning the insulation during the soldering process and to allow the wire to flex easier at a stress point.
Description : Solder used in electronic repair is normally an alloy of what two elements?
Description : When, if at all, should the heat-and-shake or the heat-and pull methods of solder removal be used?
Last Answer : These methods should not be used.
Description : What is the most effective method of solder removal?
Last Answer : Continuous vacuum.
Description : What procedure involves the use of finely braided copper wire to remove solder?
Last Answer : Wicking.
Description : Why is it not advisable to use a solder sucker when working on MOSFETs?
Last Answer : solder suckers create an electrostatic charge capable of damaging a MOSFET
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.
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.
Description : A soldering gun should NOT be used on what components?
Last Answer : Electronic components, such as resistors, capacitors, and transistors.
Description : Why are solvents used in the soldering process?
Last Answer : To remove contaminants from soldered connections.
Description : What type of flux must be used in all electrical and electronic soldering?
Last Answer : Noncorrosive, nonconductive rosin fluxes.
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
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.
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.
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.
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.
Description : Why must items to be soldered be cleaned just prior to the soldering process?
Last Answer : Solder will not adhere to dirty, greasy, or oxidized surfaces.
Description : What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?
Last Answer : Adequate ventilation.
Description : Flux aids in soldering by removing what from surfaces to be soldered?
Last Answer : Oxides.
Description : In soldering, what alloy changes directly from a solid state to a liquid state?
Last Answer : Eutectic.
Description : How do you prevent excessive heat buildup on an area of a board when soldering multilead components?
Last Answer : Use a skipping pattern
Description : What determines the shape and size of a soldering iron tip?
Last Answer : The type of work to be done.
Description : What is the most common source of heat in electronic soldering?
Last Answer : Conductive-type soldering iron.
Description : Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons
Last Answer : (c) Large number of free electrons
Description : The small circular symbols to which wire '52N57E' is connected at coordinates '57L' and '57P' shown in the illustration represent ___________________. EL-0100 A. relay contact solder points B. wire wrap connections C. terminal board screws D. switch contact terminals
Description : What amount of flat tape or round cord is required to single lace a group of conductors?
Last Answer : Two and one-half times the length of the longest conductor in the group.
Description : Besides presenting a neat appearance and supporting each other, what is the other purpose for lacing conductors?
Last Answer : To aid in tracing the conductors when alterations or repairs are required.
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.
Description : What happens to the H lines between the conductors of a coil when the conductors are close together?
Last Answer : The H lines cancel.
Description : What types of losses cause the dielectric material between the conductors to be heated?
Last Answer : Dielectric losses.
Description : State the reason for the establishment of a "unit size" for conductors.
Last Answer : To allow comparisons between conductors of different sizes and resistance.
Description : Male golfers: do prefer steel or graphite irons?
Last Answer : What does he use now, @tranquilsea?
Description : What do you call the rack that some hair stylists use to put their hair dryers, irons, etc in?
Last Answer : They are called appliance holders.
Description : What is the difference between the Callaway X-20 and X-22 irons?
Last Answer : answer:Thought this explained it for you! http://hubpages.com/hub/Callaway-X20-and-X22
Description : Do flat irons need to be replaced?
Last Answer : I have always used one that has worked best for me, and for a really long time. If it works, use it, haha well of course until it breaks :]
Description : Older- ish ladies, what did you do before flat/straightening irons came around?
Last Answer : I was a child of the 70’s. I had the very straight, long blonde hair, parted in the middle that every other teenager had back then, so a straightening iron wasn’t needed.
Description : Why are irons so difficult to fill with water?
Last Answer : Perhaps your name should be a clue.