Description : What is matter, and in what three states is it found?
Last Answer : Anything that occupies space and has weight. Solids, liquids, gases.
Description : Extrinsic (OH) absorption peaks define three regions or windows of preferred operation. List the three windows of operation.
Last Answer : The first, second, and third windows of operation are 850 nm, 1300 nm, and 1550 nm, respectively.
Description : List the key operational parameters used to define receiver performance.
Last Answer : Receiver sensitivity, bandwidth, and dynamic range.
Description : Define the Kinetic Theory of matter & define states of matter on the basis of kinetic molecular theory.
Last Answer : Ans : Kinetic Molecular Theory Of Matter : According to kinetic molecular theory the matter is composed of very tiny particles which are called molecules. The molecules of matter possess kinetic ... by the molecules are very high therefore gases have neither definite shape nor definite volume.
Description : Skew rays and meridional rays define different acceptance angles. Which acceptance angle is larger, the skew ray angle or the meridional ray angle?
Last Answer : Skew ray angle.
Description : List three items of information normally included in the general description section of a specification sheet for a transistor.
Last Answer : The kind of transistor, the transistor's common applications, and mechanical data
Description : List the three disadvantages of the air coaxial line
Last Answer : Expensive to construct, must be kept dry, and high frequency losses limit the practical length of the line.
Description : List the three basic errors that occur during fiber alignment.
Last Answer : Fiber separation (longitudinal misalignment), lateral misalignment, and angular misalignment.
Description : LEDs operating at 850 nm provide sufficient optical power for short-distance, low-bandwidth multimode systems. List three conditions that prevent the use of LEDs in longer distance, higher bandwidth multimode systems.
Last Answer : Multimode fiber dispersion, the relatively high fiber attenuation, and the LED's relatively low optical output power.
Description : List the three types of cable designs being considered by the Navy.
Last Answer : Optical fiber cable component (OFCC), stranded, and ribbon cables designs.
Description : List the three techniques used by manufacturers to buffer optical fibers.
Last Answer : Tight-buffered, loose-tube, and gel-filled loose-tube.
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.
Description : List the three groups of test equipment used for fault isolation in 2M repair.
Last Answer : On-line, off-line, and General Purpose Electronic Test Equipment (GPETE)
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 factors used to calculate resistance of a particular conductor in ohms.
Last Answer : Length, cross-sectional area, and specific resistance of a unit volume of the substance from which the conductor is made
Description : List three meter movements that can measure either ac or dc without the use of a rectifier.
Last Answer : Electrodynamic, moving vane, and hot-wire or thermocouple.
Description : List the three parts of a fiber optic data link
Last Answer : Transmitter, optical fiber, and receiver.
Description : 6. The Theory of Panspermia is still a favourite idea for some astronomers which states that a) Life could have come from pre-existing Life b) Life started from chemicals c) Units of life called spores were transferred to different planets d) Life came out of decaying & rotting matter
Last Answer : c) Units of life called spores were transferred to different planets
Description : What is the main difference between the three states of matter ?
Last Answer : The main difference between the three states of matter is: Solid matter: has a specific volume and a certain size. Fluid: has a specific volume but no specific size. Gaseous matter: There is no specific size or volume.
Description : Technical manuals for tape recorders can state the SNR in what three different ways?
Last Answer : a. Root-mean-square (RMS) signal-to-RMS noise. b. Peak-to-peak signal-to-RMS noise. c. Peak signal-to-RMS noise.
Description : Magnetic tape recorders can have up to three different heads installed. What are the three functions performed by a recorder's heads?
Last Answer : Record, reproduce, and erase.
Description : How many stable states are there for a flip-flop?
Last Answer : Two.
Description : What type of multivibrator has two stable states?
Last Answer : Bistable.
Description : For an R-S FF to change output conditions, the inputs must be in what states?
Last Answer : 1 and 0, or opposite states.
Description : In the tunnel diode, the tunneling current is at what level when the forbidden gap of the N-type material is at the same energy level as the empty states of the P-type material?
Last Answer : Minimum.
Description : In what two states can programmable read-only memory (PROM) be purchased?
Last Answer : Already programmed by the manufacturer or in a blank state.
Description : What are the two logic states of an IC?
Last Answer : A "1" or "0."
Description : List the circuits that all oscilloscopes have in common.
Last Answer : A CRT, a group of control circuits, power supply, sweep circuitry, and deflection circuitry.
Description : List two common usages of magnetic amplifiers
Last Answer : Servosystems, temperature recorders, or power supplies
Description : List the two common types of waveguides in use today.
Last Answer : Cylindrical and rectangular.
Description : List the five types of transmission lines in use today.
Last Answer : Parallel two-wire, twisted pair, shielded pair, coaxial line and waveguide.
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 two reasons why fusion splicing is one of the most popular splicing techniques in commercial applications.
Last Answer : . The small size of the fusion splice and the development of automated fusion-splicing machines.
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 seven properties cable jackets should have.
Last Answer : Low smoke generation, low toxicity, low halogen content, flame retardance, fluid resistance, high abrasion resistance, and stable performance over temperature.
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.
Description : List the standard core sizes for multimode step-index, multimode graded-index, and single mode fibers
Last Answer : Multimode step-index fibers: 50µm and 100µm. Multimode graded-index fibers: 50µm, 62.5µm, 85µm, and 100µm. Single mode fibers: between 8µm and 10µm.
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 main types of receiver noise.
Last Answer : Thermal noise, dark current noise, and quantum noise
Description : List two causes of damage to ESD-sensitive electronic components
Last Answer : Esd, improper stowage, and improper handling.
Description : List the major advantages of printed circuit boards.
Last Answer : Eliminate heavy chassis and point-to-point wiring
Description : List four factors that can degrade the frequency response of magnetic tape recorders.
Last Answer : a. A too-high or too-low bias signal level setting for the record head. b. An improper reproduce head gap. c. An improper tape transport speed. d. Poor tape-to-head contact.
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 : 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 five system design parameters considered when system designers choose the system operational wavelength and link components.
Last Answer : Launch power, connection losses, bandwidth, cost, and reliability
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 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.