Description : What is the purpose of the spring or wire around the leads of a new MOSFET?
Last Answer : To prevent damage from static electricity.
Description : What conditions must be met in order to balance a bridge circuit?
Last Answer : A bridge circuit is balanced when the opposite legs of the comparing and measuring circuits exhibit the same voltage drop.
Description : Which of the following precautions should be taken when troubleshooting various power circuits using a common solenoid-type mechanical voltage tester (wiggins)? A. Never use this tester on circuits greater ... voltage expected in the circuit in order to prevent damage from an off-scale reading.
Last Answer : Answer: A
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 : What is used to tie wire bundles in high-temperature areas?
Last Answer : High-temperature, pressure-sensitive tape.
Description : What size wire bundles require double lace?
Last Answer : Bundles that are 1 inch or larger in diameter
Description : Why is flat tape preferred instead of round cord when wire bundles are laced?
Last Answer : Round cord has a tendency to cut into the wire insulation.
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 : 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.
Description : Why are the ends of the wire clamped down after a Western Union splice is made?
Last Answer : To prevent damage to the tape insulation.
Description : What tool should be used to strip aluminum wire?
Last Answer : Knife.
Description : What is the preferred method for stripping wire?
Last Answer : By use of a wire-stripping tool
Description : The large surface area of a waveguide greatly reduces what type of loss that is common in two-wire and coaxial lines?
Last Answer : Copper loss.
Description : . Why are coaxial lines more efficient at microwave frequencies than two-wire transmission lines?
Last Answer : The electromagnetic fields are completely confined
Description : Conduction in which type of semiconductor material is similar to conduction in a copper wire?
Last Answer : N-type material.
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 : What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?
Last Answer : Adequate ventilation.
Description : If a wire passes through a connector what portion of the aircraft wire identification number changes?
Last Answer : Wire segment letter.
Description : Where would you find the wire identification system for a specific piece of equipment?
Last Answer : In the technical manual for the equipment
Description : What are the two primary disadvantages of a two-wire open line?
Last Answer : High radiation losses and noise pickup.
Description : Name two of the three described uses of a two-wire open line.
Last Answer : Power lines, rural telephone lines, and telegraph lines
Description : What procedure involves the use of finely braided copper wire to remove solder?
Last Answer : Wicking.
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 : What is the common name for enamel-insulated wire?
Last Answer : Magnet wire.
Description : State two advantages of using aluminum wire for carrying electricity over long distances.
Last Answer : It is light and reduces corona.
Description : State why it is important for you to consider the ambient (surrounding) temperature of a conductor when selecting wire size.
Last Answer : The heat surrounding the conductor is an important part of total conductor heating.
Description : List the four factors you should use to select wire for a specified current rating.
Last Answer : Conductor size, the material it is made of the location of the wiren in a circuit, and the type of insulation used.
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 : 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 : To radiate power efficiently, a long-wire antenna must have what minimum overall length?
Last Answer : One-half wavelength.
Description : How many voltage outputs are available from a two-phase three-wire alternator?
Last Answer : Three.
Description : What is the purpose of a lacing shuttle?
Last Answer : To keep the tape or cord from fouling during the lacing operation.
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 : What is the purpose of a heat shunt?
Last Answer : To prevent damage to heat-sensitive components.
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 : Hybrid rings are used primarily for what purpose?
Last Answer : High-power duplexes.
Description : What is the purpose of the absorbent material in a directional coupler?
Last Answer : Absorb the energy not directed at the pick-up probe and a portion of the overall energy
Description : What is the primary purpose of a directional coupler?
Last Answer : Sampling energy within a waveguide.
Description : What is the primary purpose of a dummy load?
Last Answer : Absorb all energy without producing standing waves.
Description : What is the purpose of D1 in figure 4-43?
Last Answer : To provide a quick discharge path for C1
Description : What is the purpose of C3?
Last Answer : C3 provides neutralization for Q1.
Description : What is the purpose of R2?
Last Answer : R2 provides the proper bias to the emitter of Q1
Description : What is the purpose of R1?
Last Answer : R1 provides the proper bias to the base of Q1 from VBB .
Description : What is the purpose of a frequency-determining network in an rf amplifier?
Last Answer : To provide maximum impedance at the desired frequency.
Description : What is the purpose of R5?
Last Answer : A swamping resistor for L2
Description : What is the purpose of L2?
Last Answer : A series peaking coil for Q1.
Description : What is the purpose of R4?
Last Answer : A part of the low-frequency compensation network for Q1.
Description : What is the purpose of C1?
Last Answer : A decoupling capacitor for the effects of R2
Description : What is the purpose of L3?
Last Answer : A shunt peaking coil for Q2.
Description : What is the purpose of "stickoff voltage"?
Last Answer : It is used in synchro systems to prevent false synchronizations.