Description : If a wire passes through a connector what portion of the aircraft wire identification number changes?
Last Answer : Wire segment letter.
Description : What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?
Last Answer : Adequate ventilation.
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 : How should excess solder be removed from a hot soldering iron?
Last Answer : By use of a cleaning cloth.
Description : What determines the shape and size of a soldering iron tip?
Last Answer : The type of work to be done.
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.
Last Answer : Answer: B
Description : The joint for soldering is supported by binding wire made of (A) Mild steel (B) Copper (C) Soft iron (D) Stainless steel
Last Answer : Option C
Description : Using table 1-2, determine the resistance of 1,500 feet of AWG 20 wire at 25º C.
Last Answer : 1,000 ft = 10.4 ohms1,500 ft = 1.5 × 0.4 = 15.6 ohms
Description : Which type of fiber optic connector (butt-jointed or expanded beam) brings the prepared ends of two optical fibers into close contact?
Last Answer : Butt-jointed connectors.
Description : What connection properties result in fiber optic connector coupling loss?
Last Answer : Poor fiber alignment and end preparation, fiber mismatches, and Fresnel reflection.
Description : Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?
Last Answer : Splice.
Description : Which connector should you use to connect the (a) power source and (b) load to the fuseholder shown in figure 2-12(A)?
Last Answer : a. Center connector b. Outside connector
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 : 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 causes the nuts or screws that hold the tips on soldering irons and guns to loosen?
Last Answer : The heating and cooling cycles.
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 : 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.
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 : 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 is the most common source of heat in electronic soldering?
Last Answer : Conductive-type soldering iron.
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
Description : Which type of flux should be used when soldering electrical wire connections and electronic components? A. Silver flux B. Rosin flux C. Solid flux D. Acid flux
Description : Which wire has the least resistance? Wire A-copper, 1000 circular mils, 6 inches long. Wire B-copper, 2000 circular mils, 11 inches long.
Last Answer : Wire B.
Description : Why do you think it is best for a soldering iron to have a soldering stand?
Last Answer : Have you ever had a soldering iron roll off the table and landon your wrist, burning a hole that took over a month to heal? I didin 5th grade while building one of the Radio Shack electronics kitsI had ... stand!!! I was nevergoing to run the risk of a soldering iron getting away from meagain!!!!!
Description : Where can I go to get some information on soldering iron?
Last Answer : When you use a soldering iron you would be soldering some kind of metal frame or something because soldering irons are irrelevant to soldering iron. Sorry, not applicable.
Description : What is soldering iron and how do you use it?
Last Answer : Soldering iron is used in heating the metal for soldering. If you want to learn more about soldering iron visit en.wikipedia.org/wiki/Soldering_iron.
Description : The proper way to apply plastic electrical tape to an electric cable splice is to _____________. A. apply tape to the braided cover, but avoid touching it B. wind the tape so that each turn overlaps ... tape in one non-overlapping layer only D. heat the tape with a soldering iron for good bonding
Description : What is the advantage of using a closed-servo loop to control load velocity?
Last Answer : The closed-servo loop can regulate load speed under changing conditions.
Description : What is the advantage of using in-line wattmeters over output power meters?
Last Answer : Most in-line wattmeters are capable of measuring both forward and reflected power.
Description : What is the main advantage of using a time-domain reflectometer (tdr) to test a transmission line?
Last Answer : Tdr will indicate the nature of and the distance to or location of any faults.
Description : What is the advantage of using a battery test set versus a voltmeter to test batteries?
Last Answer : A battery test set will test batteries under load conditions.
Description : What advantage is gained by using pole pieces with curved faces in the D’Arsonval meter movement?
Last Answer : Two-position and three-position.
Description : What is the primary advantage of using a current probe?
Last Answer : Current probes enable you to perform current measurements without disconnecting wires. Current probes are clamped around the insulated wire.
Description : What is an advantage of using horizontal polarization at high frequencies?
Last Answer : Less interference is experienced by man-made noise sources
Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?
Last Answer : Point-contact.
Description : State two advantages of using aluminum wire for carrying electricity over long distances.
Last Answer : It is light and reduces corona.
Description : When using an American Standard Wire Gauge to determine the size of a wire, where should you place the wire in the gauge to get the correct measurement?
Last Answer : In the parallel walled slot not the circular area.
Description : What Fibre optic cable can be joined using a connector block?
Last Answer : Need answer
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
Description : What is the purpose of using flux at the time of soldering? A. To remove oxidation B. To prevent corrosion C. To promote wet surface D. All of these
Last Answer : What is the purpose of using flux at the time of soldering? A. To remove oxidation B. To prevent corrosion C. To promote wet surface D. All of these
Description : When you are using an ohmmeter to test a transistor for leakage, what is indicated by a low, but not shorted, reverse resistance reading?
Last Answer : A leaking transistor
Description : Using the graph in figure 3-8, what is the approximate value of current when the resistance is 3 ohms?
Last Answer : 4 amperes.