Description : Which of the following statements about copper wire sized by the AWG rating is correct? A. Number 12 AWG wire has a higher current rating than number 10 AWG wire. B. Number 10 AWG wire has a higher ... Number 12 AWG wire at 25°C has more resistance per 1000 feet than No. 10 AWG wire at 25°C.
Last Answer : Answer: D
Description : Which of the following statements concerning copper wire sized by AWG numbers is correct? A. Number 12 AWG wire has a higher current rating than 10 AWG wire. B. Number 12 AWG wire at 25°C has more ... dielectric strength than 12 AWG wire. D. Number 12 AWG wire is larger than number 10 AWG wire.
Last Answer : Answer: B
Description : Wire in general, when used aboard vessels must meet minimum requirements. Which of the following statements is/are correct? A. Each wire must be 14 AWG or larger, regardless of locations and use. B. ... enclosure or cover is the ground wire used with portable tools and lights. D. All of the above.
Description : The standard measuring unit of wire by its cross-sectional area, as used in American wire tables is the _____________. A. AWG B. circular mil C. square millimeter D. cubic inch
Description : Which of the AWG wire sizes listed below would have the smallest diameter? A. 0 B. 0 C. 14 D. 250
Last Answer : Answer: C
Description : Which solid AWG wire size has the smallest physical cross-sectional area? A. 12 B. 14 C. 16 D. 18
Description : In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having
Last Answer : In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having Higher current carrying capacity
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 : The resistance of a wire at `20^(@)C` is `20Omega` and at `500^(@)C` is `60Omega`. At which temperature its resistance will be `25Omega`?
Last Answer : The resistance of a wire at `20^(@)C` is `20Omega` and at `500^(@)C` is `60Omega`. At which temperature its ... @)C` C. `70^(@)C` D. `80^(@)C`
Description : Coast Guard Regulations (46 CFR) state that the minimum conductor size allowed for use in flexible electrical cords is ____________. A. 10 AWG B. 14 AWG C. 18 AWG D. 20 AWG
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 : 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 : Coast Guard Regulations (46 CFR) require instrument and control wiring in a switchboard to be of what minimum size? A. 12 AWG B. 14 AWG C. 16 AWG D. 18 AWG
Description : A bird sitting on a high tension electric wire does not get electrocuted because – (1) it has high resistance (2) the body is earthed (3) it does not form a closed path for the flow of current (4) its feet are good insulators
Last Answer : (3) it does not form a closed path for the flow of current Explanation: Electricity travels from a place of high voltage to low voltage, just as water travels from high elevation to low ... When electricity travels through a body in this fashion, electrocution takes place, and the bird can die.
Description : A coil is wound with 400 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms? A. 4.8 amps B. 7.06 amps C. 10.65 amps D. 11.27 amps
Description : A coil is wound with 200 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms? A. 1.14 amps B. 7.04 amps C. 10.22 amps D. 14.08 amps
Description : The distance between a generator and its load is 100 feet. What would be the approximate total voltage drop across a two wire supply cable if the current were 5.5 amperes and the resistance of the wire were 2.525 ohms per 1,000 feet? A. 0.5 volts B. 1.38 volts C. 1.90 volts D. 2.77 volts
Description : A bird sitting on a high tension electric wire does not get electrocuted because (1) it has high resistance (2) the body is earthed (3) it does not form a closed path for the flow of current (4) its feet are good insulators
Last Answer : it does not form a closed path for the flow of current
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 : Determine the maximum shearing stress and elongation in a helical steel spring composed of 20 turns of 20-mm-diameter wire on a mean radius of 90 mm when the spring is supporting a load of 1.5 kN. and G = 83 GPa. a. 200 mm b. 105.4 mm c. 150 mm d. 250 mm
Last Answer : b. 105.4 mm
Description : A contractor wishes to determine a suitable combination of manual labour and machine work for the excavation of a multistory construction. For every cum of excavation, 3 man-hours are needed; or 0.2 machine-hour. Costs ... total cost will be (a) 1500 cum (b) 1800 cum (c) 2250 cum (d) 2500 cum
Last Answer : (d) 2500 cum
Description : When using the tight-hand rule to determine precession, which finger indicates the direction of the applied force?
Last Answer : Middle finger.
Description : For determine the specific gravity of soil solids, using a pycnometer of 500 cc., the following data is available : Weight of dry empty pycnometer = 125 g Weight of dried soil and pycnometer = 500 g Weight of dried soil and distilled ... of soil solids, is (A) 2.0 (B) 2.25 (C) 2.50 (D) 2.75
Last Answer : (C) 2.50
Description : A series circuit consisting of three resistors has a current of 3 amps. If R1 = 20 ohms, R2= 60 ohms, and R 3 = 80 ohms, what is the (a) total resistance and (b) source voltage of the circuit?
Last Answer : (a) 160 ohms. (b) 480 ohms
Description : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Last Answer : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Description : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- 1)` volt, the resistance of the wire is
Last Answer : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- ... `(8 pm 1.5)Omega` D. `(8 pm 3)Omega`
Description : `AB` is a wire of uniform resistance. The galvanometer `G` shows no deflection when the length `AC = 20 cm` and `CB = 80 cm`. The resistance `R` is eq
Last Answer : `AB` is a wire of uniform resistance. The galvanometer `G` shows no deflection when the length `AC = 20 cm ... ` B. `8Omega` C. `20Omega` D. `40Omega`
Description : Using table 1-1, name two synchros that provide a mechanical output.
Last Answer : The torque receiver (TR) and the torque differential receiver (TDR).
Description : Determine the ratio of the number of people having characteristic X to the number of people having characteristic Y in a population of 100 subjects from the following table People having X and Y are 20 People having X but not Y are 10 ... 3 : 5 b) 3 : 2 c) 1 : 2 d) 2 : 3 e) None of these
Last Answer : Answer: A Number of people having characteristic X = 10 + 20 = 30 Number of people having characteristic Y = 20 + 30 = 50 Therefore Required ratio = 30 : 50 = 3 : 5
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.
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 : 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 : Conduction in which type of semiconductor material is similar to conduction in a copper wire?
Last Answer : N-type material.
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.