Description : ________ is a typeof transmission impairment in which the signal loses strength due to theresistance of the transmission medium. A) Attenuation B) Distortion C) Noise D) Decibel
Last Answer : Attenuation
Description : ________ is a typeof transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal. A) Attenuation B) Distortion C) Noise D) Decibel
Last Answer : Distortion
Description : _______ is a typeof transmission impairment in which an outside sourcesuch as crosstalk corrupts asignal. A) Attenuation B) Distortion C) Noise D) Decibel
Last Answer : Noise
Description : The .............. measures the relative strengths of two signals or a signal at two different points. (A) frequency (B) attenuation (C) throughput (D) decibel
Last Answer : (D) decibel
Description : The random and unpredictable electric signal from natural causes, both internal and external to the system is know as ________. A. Distortion B. Noise C. Attenuation D. Interference
Last Answer : B. Noise
Description : _________can impair a signal. A) Attenuation B) Distortion C) Noise D) All of theabove
Last Answer : All of theabove
Description : _________ is the random and unpredictable electric signals from natural causes, both internal and external to the system. A. Interference B. Attenuation C. Distortion D. Noise
Last Answer : D. Noise
Description : Reduction of signal strength during transmission is called attenuation. -Technology
Last Answer : TrueDuring transmission, the signal strength is reduced, this phenomenon is called attenuation.
Description : The loss in signal power as light travels down the fiber is called ............. A) Attenuation B) Propagation C) Scattering D) Interruption
Last Answer : A) Attenuation
Description : Attenuation and noise can impair a signal. True False
Last Answer : True
Description : Decrease in strength of signal is known as A. tuning B. modulation C. attenuation D. amplification
Last Answer : attenuation
Description : Band loss is ∙ a. A reduction in transmitter power caused by earth’s surface curvature ∙ b. A reduction in strength of the signal caused by folded dipole bends ∙ c. An attenuation increase caused by bends radiating from the side of the fiber ∙ d. All of these
Last Answer : c. An attenuation increase caused by bends radiating from the side of the fiber
Description : The unit of noise pollution (level) is – (1) decibel (2) decimal (3) ppm (4) None of these
Last Answer : (1) decibel Explanation: Noise pollution refers to any unpleasant, damaging or irritating noise that has the potential to harm people, wildlife or the environment. The decibel (dB) is the main unit used ... can also be measured. by its pitch, which is the frequency of sound vibrations per second.
Description : Noise is measured in – (1) Watt (2) REM (3) Centigrade (4) Decibel
Last Answer : (4) Decibel Explanation: The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference level. A ratio in ... from their roosts in caves, attics, or trees at dusk and hunt for insects into the night.
Description : The unit of measurement of noise is – (1) Decibel (2) Hertz (3) Amplifier (4) Acoustics
Last Answer : (1) Decibel Explanation: The decibel (dB) is the unit used to measure the intensity of sound or noise level. It is given in terms of a logarithmic function of a ratio of power intensities. One ... one bel, named in honor of Alexander Graham Bell who was the inventor of the telephone and phonograph.
Description : A decibel is – (1) A musical instrument (2) The wavelength of noise (3) A musical note (4) A measure of sound level
Last Answer : (4) A measure of sound level Explanation: The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference ... ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities.
Description : Noise pollution level in a chemical plant is expressed in (A) Roentgen (B) Decibel (C) Hertz (D) None of these
Last Answer : (B) Decibel
Description : The unit of measurement of noise is (1) Decibel (2) Hertz (3) Amplifier (4) Acoustics
Last Answer : Decibel
Description : The unit of noise pollution (level) is : (1) decibel (2) decimal (3) ppm (4) None of these
Last Answer : decibel
Description : Noise is measured in (1) Watt (2) REM (3) Centigrade(4) Decibel
Description : A decibel is (1) a musical instrument (2) the wavelength of noise (3) a musical note (4) a measure of sound level
Last Answer : a measure of sound level
Description : In perspective projection, if a line segment joining a point which lies in front of the viewer to a point in back of the viewer is projected to a broken line of infinite extent. This is known ... ....... (A) View confusion (B) Vanishing point (C) Topological distortion (D) Perspective foreshortening
Last Answer : (C) Topological distortion
Description : OES Office Systems' use of fax machines to carry its advertising messages to customers is which component of the communication process? A)Medium of transmission. B)Decoding process. C)Coding process. D)Sharing of meaning. E)Noise minimisation.
Last Answer : A)Medium of transmission.
Description : Which causes a quantization noise in PCM system? A. Serial transmission errors B. The approximation of the quantized signal C. The synchronization between encoder and decoder D. Binary coding techniques
Last Answer : B. The approximation of the quantized signal
Last Answer : The approximation of the quantized signal
Description : What is the effect in over modulated amplitude modulated radio broadcasting transmission? A. Interference to adjacent channel B. Higher fidelity C. Increase noise D. Higher audio signal
Last Answer : A. Interference to adjacent channel
Description : Quantization noise is caused by A. binary coding techniques B. serial transmission errors C. the synchronization between encoder and decoder D. the approximation of the quantized signal
Last Answer : D. the approximation of the quantized signal
Description : A special request originated from some device to the CPU to acquire some of its time is called ___________ a) Disturbance b) Attenuation c) Interrupt d) Noise
Last Answer : Answer: c Explanation: An interrupt is a kind of request which takes control of the system bus for some time, then performs all the operations and gives back control to the CPU. It is usually identified by some number and is handled by the interrupt controller
Description : Under normal condition, a single fiber should not be used for a two-way communication mainly because of ∙ a. Loss ∙ b. Fading ∙ c. Noise ∙ d. Attenuation
Last Answer : ∙ c. Noise
Description : Which of the following term best described the overload distortion? A. Peak limiting B. Quantization noise C. Granular noise D. Slope distortion
Last Answer : A. Peak limiting
Description : What is the mixing process? A. Distortion caused by auroral propagation B. The combination of two signals to produce sum and difference frequencies. C. The elimination of noise in wideband receiver by phase differentiation D. The elimination of noise in a wideband receiver by phase comparison
Last Answer : B. The combination of two signals to produce sum and difference frequencies.
Description : What is the reason why companding is employed in PCM systems? A. To overcome impulse noise in PCM receivers B. To allow amplitude limiting in the receivers C. To solve quantizing noise problem D. To protect small signals in PCM from quantizing distortion
Last Answer : D. To protect small signals in PCM from quantizing distortion
Description : Which of the following contributes to harmonics distortion in amplifiers? A) Positive feedback B) Presence of noise C) Defective active device D) Non linearity in active device.
Last Answer : D) Non linearity in active device.
Description : Popular measures of distortion is a. Squared error measure b. Absolute difference c. Noise d. Nats
Last Answer : a. Squared error measure
Description : The rate for a discrete source is simply the______. a. Entropy b. Loss c. Noise d. Distortion
Last Answer : a. Entropy
Description : Which type of optical fiber (multimode or single mode) tends to have lower loss and produces less signal distortion?
Last Answer : Single mode fiber.
Last Answer : Which type of fading causes serious distortion of modulated signal: Selective fading.
Description : Quality of transmission depends upon (1) Nature of signal only (2) Nature of medium only (3) Both (1) and (2) (4) Neither A nor B
Last Answer : (3) Both (1) and (2) Explanation: Quality of transmission is governed both by nature of signal and nature of communication channel/medium.
Description : Rate of change of a signal on a transmission medium after encoding and modulation have occurred
Last Answer : baud rate
Description : Which of the following phenomena is possible is free space medium? A. Reflection of radio wave B. Diffraction of radio wave C. Refraction of radio wave D. Attenuation of radio wave
Last Answer : D. Attenuation of radio wave
Description : When the wave travels in a conducting medium, the rate of attenuation is decided by
Last Answer : When the wave travels in a conducting medium, the rate of attenuation is decided by Both attenuation constant and phase constant
Description : The loss in signal power as light travels down a fiber is called a. Dispersion b. Scattering c. Absorption d. Attenuation
Last Answer : d. Attenuation
Description : ECE Board Exam November 1996 The loss in signal power as light travels down a fiber is A. attenuation B. propagation C. absorption D. scattering
Last Answer : A. attenuation
Description : Phenomena in which signal transmitted in one circuit creates undesired effect in other circuit is known as A. crosstalk B. signal attenuation C. sampling D. crosslinking
Last Answer : crosslinking
Description : The loss in signal power as light travels down the fiber is called a. attenuation b. progragation c. scattering d. interruption
Description : If the length of the fiber point defect changes with pulse duration, is the OTDR signal deviation a point defect or a region of high fiber attenuation?
Last Answer : A point defect.
Description : Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal
Last Answer : ∙ a. It has high losses
Description : The loss in signal power as light travels down a fiber is called ∙ a. Dispersion ∙ b. Scattering ∙ c. Absorption ∙ d. Attenuation
Last Answer : ∙ d. Attenuation