Description : Which are more sensitive to alignment errors, single mode or multimode fibers?
Last Answer : Single mode.
Description : Delay differences between the source wavelengths occur as the optical signal propagates along the fiber. What is this called?
Last Answer : Differential group delay t(l).
Description : Microbend loss is caused by microscopic bends of the fiber axis. List three sources of microbend loss.
Last Answer : Uneven coating applications, improper cabling procedures, and external force.
Description : List the three parts of an optical fiber.
Last Answer : Core, cladding, and coating or buffer.
Description : List the three parts of a fiber optic data link
Last Answer : Transmitter, optical fiber, and receiver.
Description : What is the basic fiber cleaving technique for preparing optical fibers for coupling?
Last Answer : Score-and-break.
Description : What are the two basic types of preamplifiers used in fiber optic receivers?
Last Answer : The high-impedance amplifier and the transimpedance amplifier.
Description : What is the basic optical-material property relevant to optical fiber light transmission?
Last Answer : The index of refraction.
Description : Describe the basic functions of a fiber optic data link
Last Answer : The basic functions of a fiber optic data link are to convert an electrical input signal to an optical signal, send the optical signal over an optical fiber, and convert the optical signal back to an electrical signal.
Description : List the types of systematic errors and state the reasons due to which these errors occur.
Last Answer : Systematic Error: i) Instrumental Error: These errors are caused due to the mechanical structure of measuring instrument such as: a) Inherent shortcomings of instruments: Instrument may ... or electrostatic fields. iii) Observational Error: Parallax errors, incorrect multiplying factor.
Description : What is the reference point for alignment of all synchro units?
Last Answer : The voltmeter method.
Description : Do small core distortions formed by arc fusion's self alignment mechanism have more of an affect on light propagating through multimode or single mode fibers?
Last Answer : Single mode fibers.
Description : List six types of fiber mismatches.
Last Answer : Core diameter mismatch, cladding diameter mismatch, core ellipticity, core and cladding concentricity differences, NA mismatch, and refractive index profile differences.
Description : List five common fiber optic transmitter packages.
Last Answer : TO can, DIP, butterfly lead microcircuits, circuit cards, and stand-alone optical fiber converters.
Description : List the two principal optical detectors used in fiber optic systems.
Last Answer : The semiconductor positive-intrinsic-negative (PIN) photodiode and avalanche photodiode (APD).
Description : List the types of fiber optic components considered part of a fiber optic cable plant.
Last Answer : Optical fiber cables, connectors, splices, mounting panels, jumper cables, and other passive components.
Description : List the fiber geometrical measurements performed in the laboratory.
Last Answer : Cladding diameter, core diameter, numerical aperture, and mode field diameter.
Description : List five precautions to take when installing fiber optic systems on board naval ships.
Last Answer : a. Never bend an optical fiber or cable at a radius of curvature less than the minimum bend radius. b. Never pull fiber optic cables tight or fasten them over or through sharp corners or ... the hardware. e. Allow only trained, authorized personnel to install or repair fiber optic systems.
Description : List four system topologies that can be constructed using point-to-point fiber optic links.
Last Answer : Linear bus, ring, star, and tree topologies.
Description : List seven advantages of fiber optics over electrical systems.
Last Answer : Advantages of fiber optics are improved system performance, immunity to electrical noise, signal security, electrical isolation, reduced size and w
Description : Which one of the following is necessary for mass spectrometry to occur? A. Loss of an electron B. Change of alignment of a proton in a magnetic field C. A molecular vibration D. Excitation of an electron from the ground state to a higher energy state
Last Answer : Loss of an electron
Description : While explaining the basic principles of non-alignment, what did Nehru propose? -SST 10th
Last Answer : (i) To keep away from power blocs or groups aligned against each other. (ii) To keep on the closest terms of friendship with all countries.
Description : What is BLAST (Basic Local Alignment Search Tool) in bioinformatics? -Biology
Last Answer : answer:
Description : The action of electromagnetic machines can be related to which ofthe following basic principles ? (a) Induction (b) Interaction (c) Alignment (d) All of the above
Last Answer : (d) All of the above
Description : How do we refer to errors caused by faulty logic and coding mistakes?
Last Answer : Bugs.
Description : When are fixed skew errors most likely to show up?
Last Answer : When you record on one tape recorder and then reproduce on a different recorder.
Description : Tape winding errors can cause a deformed tape pack. What are four common types of tape pack deformation?
Last Answer : Cinching, pack slip, spoking, and windowing.
Description : Some tapes you are using may have level errors. What does this mean and what is the cause?
Last Answer : The actual output signal level of the tape exceeds the manufacturer’s specified range for the output signal level (+ / - 10%). It’s caused by an uneven oxide coating on the tape due to worn tape or defective manufacture.
Description : You see a build-up of dust and lint on the take-up reel of a tape recorder. This can cause which of the four types of tape errors?
Last Answer : Signal dropout errors and level errors. The dust and lint on the reel will eventually get onto the tape where it can get between the tape and the recorder’s heads.
Description : What are four types of tape errors that can degrade a magnetic recording system’s performance?
Last Answer : Signal dropout, noise, skew, and level. Dropout is the most common.
Description : Explain the difference between multimode and single mode core-cladding concentricity errors.
Last Answer : Multimode core-cladding concentricity error is the distance between the core and cladding centers expressed as a percentage of core diameter while the single mode core-cladding concentricity error is just the distance between the core and cladding centers
Description : What are the three parts of a fiber optic transmitter?
Last Answer : Interface circuit, source drive circuit, and an optical source.
Description : Modal dispersion affects the bandwidth of multimode systems. It is essential to adjust what three fiber properties to maximize system bandwidth?
Last Answer : Core diameter, NA, and index profile properties.
Description : List any two types of alignment that can be applied to a paragraph in HTML. -Technology
Last Answer : Any two types of alignment that can be applied to a paragraph are as follows:Left alignment: This type of alignment aligns text in left. This is the default alignment.Syntax Right alignment: This type of alignment aligns text in right within the paragraph.Syntax
Description : The primary advantage of key-to-tape data entry system is A) A large percentage of editing can be performed at the time of data entry B) Key verification is easily performed C) The tape is reusable D) Keying errors can be detected as they occur.
Last Answer : Answer : C
Description : The primary advantage of key-to-tape data entry system is a. A large percentage of editing can be performed at the time of data entry b. Key verification is easily performed c. The tape is reusable d. Keying errors can be detected as they occur
Last Answer : The tape is reusable
Description : Error rate is A. an error-detectingcode based ona summation operation performed onthebits to be checked. B. a checkbit appended to anarrayof binary digits to make thesum of all thebinary digits. C. a ... ratioof the number ofdata units in error to the total number of dataunits E. None of the above
Last Answer : the ratioof the number ofdata units in error to the total number of dataunits
Description : Pick up the correct statement from the following: (A) Mistakes arise from inattention, inexperience or carelessness (B) Systematic errors persist and have regular effects in the survey performances (C) Accidental errors occur inspite of every precaution is taken (D) All the above
Last Answer : (D) All the above
Description : If errors occur in the recording process, they a. should be corrected as adjustments at the end of the period. b. should be corrected as soon as they are discovered. c. should be corrected when preparing closing entries. d. cannot be corrected until the next accounting period.
Last Answer : b. should be corrected as soon as they are discovered.
Description : State any four errors that occur in dynamometer type wattmeter
Last Answer : Errors that occur in dynamometer type wattmeter: 1. Errors due to method of connection. 2. Error due to pressure coil inductance. 3. Error due to pressure coil Capacitance. 4. Error due to mutual ... Error due to eddy currents. 7. Temperature error. 8. Error due to vibration of moving system
Description : Gross errors occur in measurements because of (A) disturbances about which we are unaware. (B) human mistakes. (C) inherent shortcomings in the instrument. (D) loading effects on the meters.
Last Answer : Gross errors occur in measurements because of human mistakes.
Description : List three types of errors in measuring instruments. Give reasons of occurring for any one of them.
Last Answer : Types of errors in measuring instruments: A) Gross error: These are due to mistakes on the part of person using the instrument. B) Systematic Error: i) Instrumental Error: These ... multiplying factor. C) Random error: These persist even after gross and systematic errors are removed.
Description : These bends are caused by excessive pressure and tension and generally occur while fiber are bent during handling or installation. ∙ A. microbending ∙ B. macrobending ∙ C. constant-radius bending ∙ D. kinks
Last Answer : C. constant-radius bending
Description : These bends are caused by excessive pressure and tension and generally occur while fiber are bent during handling or installation.
Last Answer : constant-radius bending
Description : If magnetic tape is stored in areas with temperature and humidity extremes, what are three types of tape damage that may occur?
Last Answer : Oxide shedding, layer-to-layer sticking, and tape deformation.
Description : An auditor is required to obtain a basic understanding of the client's internal control to plan the audit. The auditor may then decide to perform tests of controls on all internal control ... to be strengths for which the auditor desires further reduction in the assessed level of control risk.
Last Answer : Considered to be strengths for which the auditor desires further reduction in the assessed level of control risk.
Description : The following statements relate to the auditor's responsibility for the detection of errors and fraud. Which of the statement is correct? I. Due to the inherent limitations of the audit, there is a possibility that ... . a. I only b. II only c. Both statements are true d. Both statements are false
Last Answer : Both statements are true
Description : What are the three basic characteristics of sound
Last Answer : Pitch, intensity, and quality.
Description : What are the three basic requirements for sound?
Last Answer : A source, medium, and detector (receiver).
Description : What the three basic components make up the typical magnetic amplifier?
Last Answer : Two saturable reactors and a transformer.