Description : Why must cables and wires be identified?
Last Answer : To provide the technician with a means to trace the wires when troubleshooting and repairing electrical and electronic systems.
Description : Which of the following statements concerning electrical cables is correct? A. Where they pass through watertight bulkheads, they should be fitted with watertight stuffing boxes. B. Electric cable coverings should ... , or glued in place where nonmetallic insulation is used. D. All of the above.
Last Answer : Answer: A
Description : How many categories of nonmetallic protective coverings are there?
Last Answer : Three
Description : What are three types of nonmetallic insulating materials that can be used in a high-temperature environments?
Last Answer : FEP, extruded polytetrafluoroethylene, and silicone rubber.
Description : Which of the following statements best describes the material known as varnished cambric? A. Felted asbestos sealed with varnish. B. Cotton cloth coated with insulating varnish. C. Rubber ... Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.
Last Answer : Answer: B
Description : What is the most common method of terminating and splicing wires?
Last Answer : The use of preinsulated splices and terminal lugs
Description : Conduit pipes are normally used to protect _____ cables. (a) unsheathed cables (b) armoured (c) PVC sheathed cables (d) all of the above
Last Answer : (a) unsheathed cables
Description : When should wires be twisted prior to lacing?
Last Answer : When required, such as for the filament leads in electron tube amplifiers.
Description : What two methods of manufacture are being used to eliminate bonding wires?
Last Answer : Flip-chip, beam lead
Description : Is sulfur a nonmetallic?
Last Answer : yes think so
Description : In terms of valence electrons what is the different between metallic elements and nonmetallic elements?
Last Answer : Feel Free to Answer
Description : What is the valve 1919 wheat penny nonmetallic?
Description : What are the physical properties of nonmetallic materials?
Last Answer : Need answer
Description : What physical characteristics of gypsum can be described as nonmetallic?
Last Answer : luster
Description : How do atoms of nonmetallic elements generally form ions?
Last Answer : Non metals usually form ions by gaining electrons to becomeanions (negatively charged ions).
Description : What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. ... -static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring
Last Answer : A. Apply shielding and filtering where necessary
Description : Transmission media are usually categorized as_______. A) fixed or unfixed B) guided orunguided C) determinate or indeterminate D) metallicor nonmetallic
Last Answer : guided orunguided
Description : Figure out the odd statement about ceramics in the following (a) Good insulators of heat and electricity (b) Usually less desire than metals (c) Ductile in nature (d) Contains both metallic and nonmetallic elements
Last Answer : (c) Ductile in nature
Description : Of the nonmetallic elements the one least likely to be found in organic compounds is: w) nitrogen x) phosphorus y) chlorine z) selenium
Last Answer : ANSWER: Z -- SELENIUM
Description : What precautions should you take when tying bundles containing coaxial cables?
Last Answer : Do not tie too tightly and use the proper type of tape.
Description : Why are splices staggered on multiconductor cables?
Last Answer : To prevent the joint from being bulky.
Description : OFCC, stranded, and ribbon cables have different fiber worst bend performance?
Last Answer : Ribbon.
Description : When is an optical power meter measurement recommended for conducting field measurements on installed optical fiber cables or cable plants?
Last Answer : When an installed optical fiber cable or cable plant is less than 50 meters in length.
Description : Optical fibers or cables should never be bent at a radius of curvature smaller than a certain value. Identify this radius of curvature
Last Answer : Minimum bend radius.
Description : What are the three types of lead-sheathed cables?
Last Answer : Alloy lead, pure lead, and reinforced lead.
Description : What is the main disadvantage of using fiber-optic cables?
Last Answer : High attenuation.
Description : What instrument is used for measuring the insulation resistance of cables?
Last Answer : Megohmmeter (megger).
Description : Give an example of a device you could protect with each type of time delay fuse.
Last Answer : Delay-Motors, solenoids, or transformers. Standard Automobiles, lighting or electrical power circuits. Fast-Delicate instruments or semiconductor devices.
Description : Solid type cables are considered unreliable beyond 66 kV because (a) insulation may melt due to higher temperature (b) skin effect dominates on the conductor (c) of corona loss between conductor and sheath material (d) there is a danger of breakdown of insulation due to the presence of voids
Last Answer : (d) there is a danger of breakdown of insulation due to the presence of voids
Description : Two wires of the same material have resistances in the ratio ` 16 : 81` and lengths in the ratio ` 1 : 4`. Compare their radii of cross-section.
Last Answer : Two wires of the same material have resistances in the ratio ` 16 : 81` and lengths in the ratio ` 1 : 4`. Compare their radii of cross-section.
Description : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in the ratio ` 3 : 2`. If the resistance of the wire B is
Last Answer : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in ... `180 Omega`, find the resistance of the wire A.
Description : Assertion : Two resistance wires shown in figure are of same material. They have equal length. More heat is generated in wire A. Reason : In series `H
Last Answer : Assertion : Two resistance wires shown in figure are of same material. They have equal length. More ... . If Assertion is false but Reason is true.
Description : Two wires of the same material but of different diameters carry the same current `i`. If the ratio of their diameters is `2:1` , then the correspondin
Last Answer : Two wires of the same material but of different diameters carry the same current `i`. If the ratio of their diameters is ... `1:1` C. `1:2` D. `1:4`
Description : If two wires of the same material have the same thickness but different length the blank wire will have greater resistance?
Last Answer : Materials
Description : Four wires of the same material and dimensions as under are stretched by a load of same magnitude separately. Which of them will be elongated maximum? (a) wire of 3m length and 1.5 mm diameter (b) ... and 2mm diameter (c) wire of 2m length and 2mm diameter (d) wire of 1m length and 1mm diameter
Last Answer : Ans:(a)
Description : A material is called 'ductile', if it can be (A) Drawn into wires (B) Hammered to a thin sheet (C) Fractured without deformation (D) Made lustrous by heating it
Last Answer : (A) Drawn into wires
Description : Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 1 : 4
Last Answer : Option A
Description : Which one is the best material for making connecting wires? a. Iron b. Tungsten c. Silver d. Copper
Last Answer : d. Copper
Description : Property of material which allows it to be drawn out into wires is (A) Ductility. (B) Solder ability. (C) Super conductivity. (D) Malleability.
Last Answer : (A) Ductility.
Description : How do the tape guides on a tape reeling system protect the tape from damage during operation?
Last Answer : They keep the tape straight with respect to both the supply and take-up reels and the magnetic heads.
Description : When packaging tape reels or cartridges for shipping, what are four rules you should follow to protect the tape reels from impact and vibration?
Last Answer : a. Package reels so they’re supported by their hub, b. use reel bands, c. package reels in vertical position, d. package tape cartridges in their shipping cases.
Description : List four rules you should follow when storing magnetic tape to protect it from damage.
Last Answer : a. Make sure the tape is wound properly on the reel hub, b. store tapes vertically, c. keep storage area at right temperature and humidity, d. store away from equipment that generates stray magnetic fields.
Description : How are circuits protections devices connected to the circuit they are intended to protect and why are they connected in this way?
Last Answer : In series, so total current will be stopped when the device opens.
Description : The vertical dotted line connecting the small circular symbols at coordinates '05L', '09L', '13L', '21L', '25L', etc., shown in the illustration, indicate that all _______________. EL-0100 A. contacts are ... board 'TB2' C. wires are grounded at both ends of the line D. wires have a common shield
Description : Which of the following statements is correct concerning the circuits in a sound powered telephone system? A. The ringing circuit is composed of only one common wire to ground. B. The common ... connected to each station. D. The talking and calling circuits are electrically dependent upon each other.
Description : What material is most often used for the outer covering of coaxial cables? A. PVC B. Teflon C. PE D. Polystyrene
Last Answer : A. PVC
Description : The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron
Last Answer : (a) lead
Description : The material generally used for armour of high voltage cables is (a) aluminium (b) steel (c) brass (d) copper
Last Answer : (b) steel
Description : The material commonly used for insulation in high voltage cables is (a) lead (b) paper (c) rubber (d) none of the above
Last Answer : (b) paper
Description : The insulating material for cables should (a) be acid proof (b) be non-inflammable (c) be non-hygroscopic (d) have all above properties
Last Answer : (d) have all above properties