Description : The number of half-wave patterns in the "b" dimension of rectangular waveguides is indicated by which of the two descriptive subscripts?
Last Answer : Second.
Description : The field arrangements in waveguides are divided into what two categories to describe the various modes of operation?
Last Answer : Transverse electric (TE) and transverse magnetic (TM).
Description : What term is used to identify each of the many field configurations that can exist in waveguides?
Last Answer : Mode of operation.
Description : Compared to the velocity of propagation of waves in air, what is the velocity of propagation of waves in waveguides?
Last Answer : Slower.
Description : What is the primary lower-frequency limitation of waveguides?
Last Answer : Physical size.
Description : What is used as a dielectric in waveguides?
Last Answer : Air.
Description : What kind of material must be used in the construction of waveguides?
Last Answer : Conductive material.
Description : What mechanisms in the fiber waveguides weaken and distort the optical signal?
Last Answer : Scattering, absorption, and dispersion.
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 : What is considered the most efficient mode in terms of energy transfer in waveguides? A. Dominant mode B. Normal mode C. Conventional mode D. Vertical mode
Last Answer : A. Dominant mode
Description : Best reason for pressurizing waveguides with dry air A. To maintain propagation B. To maintain temperature of the waveguide C. To reduce the possibility of internal arcing D. To increase the speed of propagation
Last Answer : C. To reduce the possibility of internal arcing
Description : The velocity of a wave travelling in the air medium without transmission lines or waveguides(wireless) is a) 6 x 10 8 b) 3 x 10 8 c) 1.5 x 10 8 d) 9 x 10 8
Last Answer : b) 3 x 10 8
Description : In waveguides, which of the following conditions will be true? a) V > c b) V < c c) V = c d) V >> c
Last Answer : a) V > c
Description : Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides
Last Answer : d) Waveguides
Description : Spherical systems are employed in waveguides. State True/False a) True b) False
Last Answer : b) False
Description : Rectangular waveguides dominate the circular waveguides. Find the reason. a) Low cut-off frequency b) Easy to design c) More wave propagation d) The statement is false
Last Answer : b) Easy to design
Description : Cylindrical system is employed in waveguides. State True/False. a) True b) False
Last Answer : a) True
Description : What are the two types of coaxial lines in use today?
Last Answer : Air coaxial (rigid) and solid coaxial (flexible).
Description : List two common usages of magnetic amplifiers
Last Answer : Servosystems, temperature recorders, or power supplies
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 five common fiber optic transmitter packages.
Last Answer : TO can, DIP, butterfly lead microcircuits, circuit cards, and stand-alone optical fiber converters.
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 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 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 main types of receiver noise.
Last Answer : Thermal noise, dark current noise, and quantum noise
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 : What are the two most common types of mode filters?
Last Answer : Free-form loop and mandrel wrap.
Description : Which types of operating systems are the simplest and most common on microcomputers?
Last Answer : Single user/single tasking.
Description : What are the three more common types of irregular variations in the ionosphere?
Last Answer : Sporadic E, sudden disturbances, and ionospheric storms.
Description : What are the three most common types of packages?
Last Answer : TO, flat pack, DIP.
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 : What are the most common types of fibrous tape?
Last Answer : Rubber-filled cloth tape and a combination of cotton cloth and rubber.
Description : What is the most commonly used filter in use today?
Last Answer : LC capacitor-input filter.
Description : What is the most commonly used filter today?
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 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.
Description : List the six safety precautions for the use of voltmeters.
Last Answer : a. Always connect a voltmeter in parallel. b. Always start with the highest range. c. Deenergize and discharge the circuit before connecting or disconnecting the voltmeter. d. ... to measure ac voltage. f. Observe the general safety precautions of electric and electronic devices.
Description : List the six safety precautions for the use of ammeters
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 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 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 two causes of damage to ESD-sensitive electronic components
Last Answer : Esd, improper stowage, and improper handling.
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 : Define matter and list its three different states.
Last Answer : Anything that occupies space and has weight. Solid, liquid, and gas.
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 : 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 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 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.