Optical Fiber Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

 Optical Fiber Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury
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Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Description : Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Last Answer : ANSWER: A

Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Description : Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury

Last Answer : ANSWER: A

Optical fibers for telecommunications are typically about _____ mils thick and consists of a glass core, a glass cladding of lower index of refraction, and a protective coating ∙ a. 5 ∙ b. 6 ∙ c. 7 ∙ d. 8

Description : Optical fibers for telecommunications are typically about _____ mils thick and consists of a glass core, a glass cladding of lower index of refraction, and a protective coating ∙ a. 5 ∙ b. 6 ∙ c. 7 ∙ d. 8

Last Answer : ∙ a. 5

Optical fibres are made up of thin strands of (a) copper material (b) silver material (c) glass like material -Technology

Description : Optical fibres are made up of thin strands of (a) copper material (b) silver material (c) glass like material -Technology

Last Answer : (c) Optical fibres are made up of thin strands of glass like material.

Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?

Description : Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?

Last Answer : T-coupler

Which type of fiber optic connector (butt-jointed or expanded beam) brings the prepared ends of two optical fibers into close contact?

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.

What is the basic fiber cleaving technique for preparing optical fibers for coupling?

Description : What is the basic fiber cleaving technique for preparing optical fibers for coupling?

Last Answer : Score-and-break.

Multimode optical fibers can have a step-index or graded index refractive index profile. Which fiber, multimode step-index or multimode graded-index fiber, usually performs better?

Description : Multimode optical fibers can have a step-index or graded index refractive index profile. Which fiber, multimode step-index or multimode graded-index fiber, usually performs better?

Last Answer : Multimode graded-index fiber

A mode filter is a device that attenuates specific modes propagating in the core of an optical fiber. What mode propagating along single mode fibers do mode filters eliminate?

Description : A mode filter is a device that attenuates specific modes propagating in the core of an optical fiber. What mode propagating along single mode fibers do mode filters eliminate?

Last Answer : Second-order mode.

The ultrapure glass used to manufacture optical fibers is approximately ___pure ∙ a. 99.9 % ∙ b. 99.99 % ∙ c. 99.999 % ∙ d. 99.9999 %

Description : The ultrapure glass used to manufacture optical fibers is approximately ___pure ∙ a. 99.9 % ∙ b. 99.99 % ∙ c. 99.999 % ∙ d. 99.9999 %

Last Answer : d. 99.9999 %

What are the two methods used by fiber manufacturers to fabricate multimode and single mode glass fibers?

Description : What are the two methods used by fiber manufacturers to fabricate multimode and single mode glass fibers?

Last Answer : Vapor phase oxidation and direct-melt process.

The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid

Description : The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid

Last Answer : glass or plastic

Which of the following uses a very thin glass or plastic fiber through which pulses of light travel? a. Cat 1 b. Optical fiber c. Twisted pair d. Coax

Description : Which of the following uses a very thin glass or plastic fiber through which pulses of light travel? a. Cat 1 b. Optical fiber c. Twisted pair d. Coax

Last Answer : b. Optical fiber

The inner core of an optical fiber is in composition. a. copper b. liquid c. glass or plastic d. bimetallic

Description : The inner core of an optical fiber is in composition. a. copper b. liquid c. glass or plastic d. bimetallic

Last Answer : c. glass or plastic

Give two reasons why optical fiber manufacturers depart from the traditional circular core and cladding, low-loss glass fiber design?

Description : Give two reasons why optical fiber manufacturers depart from the traditional circular core and cladding, low-loss glass fiber design?

Last Answer : To increase performance and reduce cost

Which is not a possible cause of optical fiber loss? ∙ a. Impurities ∙ b. Glass attenuation ∙ c. Stepped index operation ∙ d. Microbending

Description : Which is not a possible cause of optical fiber loss? ∙ a. Impurities ∙ b. Glass attenuation ∙ c. Stepped index operation ∙ d. Microbending

Last Answer : ∙ c. Stepped index operation

The graded-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.5 ∙ b. 0.05 ∙ c. 0.0005 ∙ d. 5

Description : The graded-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.5 ∙ b. 0.05 ∙ c. 0.0005 ∙ d. 5

Last Answer : ∙ a. 0.5

A step-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.02 ∙ b. 0.2 ∙ c. 2 ∙ d. 0.002

Description : A step-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.02 ∙ b. 0.2 ∙ c. 2 ∙ d. 0.002

Last Answer : b. 0.2

A single mode optical fiber has a core diameter of _____ nm. ∙ a. 0.1 ∙ b. 0.01 ∙ c. 0.2 ∙ d. 0.05

Description : A single mode optical fiber has a core diameter of _____ nm. ∙ a. 0.1 ∙ b. 0.01 ∙ c. 0.2 ∙ d. 0.05

Last Answer : a. 0.1

_______uses two optical fibers anda long-wavelaser source. A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above

Description : _______uses two optical fibers anda long-wavelaser source. A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above

Last Answer : 1000Base-LX

______ uses two optical fibers and a short-wave laser source, A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above

Description : ______ uses two optical fibers and a short-wave laser source, A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above

Last Answer : 1000Base-LX

Which semiconductor sources (LD or LED) emit more focused light and are capable of launching sufficient optical power into both single mode and multimode fibers?

Description : Which semiconductor sources (LD or LED) emit more focused light and are capable of launching sufficient optical power into both single mode and multimode fibers?

Last Answer : LDs.

List the three techniques used by manufacturers to buffer optical fibers.

Description : List the three techniques used by manufacturers to buffer optical fibers.

Last Answer : Tight-buffered, loose-tube, and gel-filled loose-tube.

List three benefits that properly cabled optical fibers provide.

Description : List three benefits that properly cabled optical fibers provide.

Last Answer : a. Protect optical fibers from damage or breakage during installation and over the fiber's lifetime. b. Provide stable fiber transmission characteristics compared with uncabled fibers. c. Maintain the physical integrity of the optical fiber.

List the types of materials used in fabricating low-loss, long wavelength optical fibers.

Description : List the types of materials used in fabricating low-loss, long wavelength optical fibers.

Last Answer : Heavy-metal fluorides, chalcogenide glasses, and crystalline materials.

Will an optical fiber's attenuation coefficient vary with changes in wavelength?

Description : Will an optical fiber's attenuation coefficient vary with changes in wavelength?

Last Answer : Yes.

Optical fibers or cables should never be bent at a radius of curvature smaller than a certain value. Identify this radius of curvature Optical fibers or cables should never be bent at a radius of curvature smaller than a certain value. Identify this radius of curvature

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.

What are the two basic types of optical fibers?

Description : What are the two basic types of optical fibers?

Last Answer : Multimode and single mode fibers.

How can loss be reduced during construction (or fabrication) of optical fibers?

Description : How can loss be reduced during construction (or fabrication) of optical fibers?

Last Answer : By removing the impurities from optical fiber.

Unlike coax and twisted pair, optical fibers are immune to

Description : Unlike coax and twisted pair, optical fibers are immune to  a. High-frequency transmission b. Signal attenuation c. Power loss d. Electromagnetic interference

Last Answer : Unlike coax and twisted pair, optical fibers are immune to Electromagnetic interference

Light travels along optical fibers by

Description : Light travels along optical fibers by

Last Answer : Light travels along optical fibers by Total internal reflection

Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) Replication completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs

Description : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) ... completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs

Last Answer : (d) Palindromic sequence of base pairs

In multimode step-index fibers, the majority of light propagates in the fiber core for what reason?

Description : In multimode step-index fibers, the majority of light propagates in the fiber core for what reason?

Last Answer : Most modes in multimode step-index fibers propagate far from cutoff.

in multimode fibers, how do fiber joints increase fiber attenuation following the joint?

Description : in multimode fibers, how do fiber joints increase fiber attenuation following the joint?

Last Answer : By disturbing the fiber's mode power distribution (MPD).

The cutoff wavelength of matched-clad and depressed-clad single mode fibers varies according to the fiber's radius of curvature and length. The cutoff wavelength of which single mode fiber type is more sensitive to length

Description : The cutoff wavelength of matched-clad and depressed-clad single mode fibers varies according to the fiber's radius of curvature and length. The cutoff wavelength of which single mode fiber type is more sensitive to length

Last Answer : Depressed-clad.

The fiber's normalized frequency (V) determines how many modes a fiber can support. As the value of V increases, will the number of modes supported by the fiber increase or decrease?

Description : The fiber's normalized frequency (V) determines how many modes a fiber can support. As the value of V increases, will the number of modes supported by the fiber increase or decrease?

Last Answer : Increase.

The term single mode and multimode are best described as ∙ A. a number of fibers placed into fiber-optic cable ∙ B. the number of voice channels each fiber can support ∙ C. the number of wavelengths each fiber can support ∙ D. the index number

Description : The term single mode and multimode are best described as ∙ A. a number of fibers placed into fiber-optic cable ∙ B. the number of voice channels each fiber can support ∙ C. the number of wavelengths each fiber can support ∙ D. the index number

Last Answer : C. the number of wavelengths each fiber can support

The termssinglemode andmultimode are bestdescribes as a. the number of fibers placed into a fiber-optic cable b. the number of voice channels each fiber can support c.thenumber ofwavelengths eachfiber cansupport d. the index number

Description : The termssinglemode andmultimode are bestdescribes as a. the number of fibers placed into a fiber-optic cable b. the number of voice channels each fiber can support c.thenumber ofwavelengths eachfiber cansupport d. the index number

Last Answer : c.thenumber ofwavelengths eachfiber cansupport

This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot and mildew resistance and elasticity 50 percent greater than that of CHEM-92; Multiple Choice: What transuranic element is often used in satellites as a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235

Description : This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot ... a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235

Last Answer : ANSWER: W -- PLUTONIUM-238

Silica (pure glass) fibers are used because of their low intrinsic material absorption at the wavelengths of operation. This wavelength of operation is between two intrinsic absorption regions. What are these two regions called? What are the wavelengths of operation for these two regions?

Description : Silica (pure glass) fibers are used because of their low intrinsic material absorption at the wavelengths of operation. This wavelength of operation is between two intrinsic absorption regions. What are these two regions called? What are the wavelengths of operation for these two regions?

Last Answer : Ultraviolet absorption region (below 400 nm) and infrared absorption region (above 2000 nm).

Classify the following materials as metals and non-metals : Hydrogen, Sulphur, Selenium, Manganese, Calcium, Platinum, Gold, Silica, Polyester, Wood, Glass, Iron

Description : Classify the following materials as metals and non-metals : Hydrogen, Sulphur, Selenium, Manganese, Calcium, Platinum, Gold, Silica, Polyester, Wood, Glass, Iron 

Last Answer : Metals: calcium , manganese, platinum, gold , iron Non- metals: hydrogen, Sulphur, silica, polyester, wood, glass, selenium

The mercury thermometer broke on the pavement of the terrace, I proceeded well and I will be fine?

Description : The balls got between the joints and didn't go out, so I vacuumed them and I'll hand over the bag from the vacuum cleaner and the rest of the thermometer tomorrow. Only at the terrace does the ... terrace is lit. There could be some forgotten bullet there. I have to ventilate. Thanks for the reply.

Last Answer : "Many of us know this from childhood: Someone broke a mercury thermometer and bouncing balls of loose media spread in all directions. Whoever knew about the dangers of toxic fumes, was ... Toxicological Information Center, How to proceed Properly when cleaning mercury from a broken thermometer

Nature The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Description : Nature The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Last Answer : ANSWER: A

The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Description : The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Last Answer : ANSWER: A

The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Description : The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Last Answer : ANSWER: A

The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Description : The second most abundant metal found in the earth’s crust is _____. A. Iron B. Calcium C. Sodium D. Aluminum

Last Answer : ANSWER: A

Anemia is related to _____. (1) iodine deficiency (2) calcium deficiency (3) iron deficiency (4) food poisoning

Description : Anemia is related to _____. (1) iodine deficiency (2) calcium deficiency (3) iron deficiency (4) food poisoning

Last Answer : (3) iron deficiency Explanation: The major causes of this type are iron deficiency (low level iron) anemia and thalassemia (inherited disorders of hemoglobin).

Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Description : Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Last Answer : ANSWER: B

Manufacturing Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Description : Manufacturing Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Last Answer : ANSWER: B

Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Description : Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making

Last Answer : ANSWER: B