Which of the following compensator will increase the bandwidth of the system:
(1) Phase lag
(3) Lag-Iead
(2) Phase lead
(4) None of these
Description : In PCM system, if we increase the quantization levels from 2 to 8, the relative bandwidth requirements will: (1) Be doubled (2) Remain same (3) Be tripled (4) Becomes eight times
Last Answer : In PCM system, if we increase the quantization levels from 2 to 8, the relative bandwidth requirements will: Be tripled.
Description : increases the steady state accuracy. (a) Integrator (b) Differentiator (c) Phase lead compensator (d) Phase lag compensator Ans:A 10.As a result of introduction of negative feedback which of the following will not decrease ? (a) Band width (b) Overall gain (c) Distortion (d) Instability
Last Answer : Ans: A
Description : A resistor placed in parallel to the output of a power supply _____________. A. is a temperature compensator B. corrects power factor C. prevents excessive currents D. aids in output voltage regulation
Last Answer : Answer: D
Description : In general, polyphase induction motors can be started on full line voltage by means of ______________. A. compensator starters B. autotransformer starters C. across-the-line starters D. primary-resistor starters
Last Answer : Answer: C
Description : Low horsepower, polyphase, induction motors can be started with full voltage by means of _____________. A. compensator starters B. autotransformer starters C. across-the-line starters D. primary-resistor starters
Description : A static VAR compensator is a (A) series connected thyristor based controller (B) shunt connected thyristor based controller (C) energy storage device (D) combined series–shunt connected controller
Last Answer : Shunt connected thyristor based controller
Description : In lag compensator the damping ratio, gain and steady state error (ess) are (a) Decreases, Decreases and Increases (b) Decreases, Increases and Increases (c) Increases, Increases and Decreases (d) Increases, Decreases and Decreases
Last Answer : In lag compensator the damping ratio, gain and steady state error (ess) are Increases, Decreases and Decreases
Description : Which of the following is CORRECT with respect to a LAG-LEAD compensator ? (A) It is similar to PI controller (B) It acts as Band-pass filter (C) It is Second-order system with one zero, and two poles (D) It acts as a Band-reject filter
Last Answer : Which of the following is CORRECT with respect to a LAG-LEAD compensator ? (A) It is similar to PI controller (B) It acts as Band-pass filter (C) It is Second-order system with one zero, and two poles (D) It acts as a Band-reject filter
Description : The transfer function of a phase lead compensator is found to be the form (s+z1 ) / (s + p1 ) and that of a lag compensator to be of the form (s+z2 ) / (s + p2 ). Then which of the following conditions must be satisfied? ... (B) z1 > p1 and z2 < p2 (C) z1 < p1 and z2 < p2 (D) z1 < p1 and z2 > p2
Last Answer : A
Description : Static Synchronous Compensator (STATCOM)
Last Answer : Static Synchronous Compensator (STATCOM) STATCOM stands for Static Synchronous Compensator or Condenser. It may be a source of reactive power or sink of reactive AC power. It can ... and Controllers etc. STATCOM have symmetric lead-lag capability. STATCOM have no moving part.
Description : What is static var compensator ?
Last Answer : Static VAR Compensator (SVC) SVC are use for regulating transmission voltage and for improving power quality of industrial load. SVC is made from one or more banks ... system. Static VAR Compensator is more reliable than dynamic compensation scheme like synchronous condenser.
Description : Ideal transmission bandwidth of FM signal is
Last Answer : Ideal transmission bandwidth of FM signal is Infinite
Description : A piezo-electric type pressure sensor has a sensitivity of 1 mV/kPa and a bandwidth of 300 Hz to 300 kHz. For a constant (dc) pressure of 100 kPa, the steady state output of the sensor in millivolt is (A) 0 (B) 2 (C) 4 (D) 6
Last Answer : A piezo-electric type pressure sensor has a sensitivity of 1 mV/kPa and a bandwidth of 300 Hz to 300 kHz. For a constant (dc) pressure of 100 kPa, the steady state output of the sensor in millivolt is 0
Description : The large signal bandwidth of an opamp is limited by its: (1) Loop gain (2) Slew rate (3) Output impedance (4) Input frequency
Last Answer : The large signal bandwidth of an opamp is limited by its: Slew rate.
Description : Which of the following is not a way of minimizing if not eliminating noise? A. Use redundancy B. Increase transmitted power C. Reduce signaling rate D. Increase channel bandwidth
Last Answer : D. Increase channel bandwidth
Description : How can receiver desensitizing be reduced? A. Increase the receiver bandwidth B. Ensure good RF shielding between the transmitter and receiver C. Increase the transmitter audio gain D. Decrease the receiver squelch, gain.
Last Answer : D. Decrease the receiver squelch, gain.
Description : Top loading is used in an antenna in order to increase its ___________. A. input capacitance B. beamwidth C. bandwidth D. effective height
Last Answer : D. effective height
Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling
Last Answer : A) Wave traps in each stage
Description : Which preamplifier design (high-impedance or transimpedance) provides improvements in bandwidth and greater dynamic range with some degradation in sensitivity from an increase in noise?
Last Answer : Transimpedance.
Description : Zoningis usedwith adielectric antenna inorderto a. reduce the bulk of the lense b. increase the bandwidth of the lens c. increase pin-point focusing d. correct the curvature of the wavefront from a horn that is too short
Last Answer : a. reduce the bulk of the lense
Description : In IT the technique that is used to increase the bandwidth is (1) Memory Management (2) Memory Interleaving (3) Memory Intraleaving (4) Memory Leaving
Last Answer : Memory Interleaving
Description : _____ is the amount of uncertainty in a system of symbols A. Bandwidth B. Enthalpy C. Entropy D. Quantum
Last Answer : C. Entropy
Description : Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or ... under test, both working at the same temperature over the same bandwidth and fed from the same source
Last Answer : C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signals
Description : What is the approximate bandwidth of an FM system with 10 kHz of modulating frequency and a 150 kHz of frequency deviation? A. 300 kHz B. 320 kHz C. 150 kHz D. 200 kHz
Last Answer : B. 320 kHz
Description : What is the channel bandwidth of a standard analogue telephone system? A. 300-500 Hz B. 1200 kHz C. 100-300 Hz D. 300-3400 Hz
Last Answer : D. 300-3400 Hz
Description : The method of determining the bandwidth of any processing system is ______. A. Bandwidth analysis B. Frequency spectrum C. Spectral analysis D. Frequency analysis
Last Answer : C. Spectral analysis
Description : A pure ALOHA Network transmits 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is ______. a. 0.384 b. 0.184 c. 0.286 d. 0.58
Last Answer : b. 0.184
Description : Very large sustainable reading and writing bandwidth, mostly continuous accessing instead of random accessing. The programming interface is similar to that of the POSIX file system accessing interface. This is ... : Google File System c) HDFS: Hadoop Distributes File System d) None of the above
Last Answer : GFS: Google File System
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 : For the 16-PSK and a transmission system with a 10kHz bandwidth, determine the maximum bit rate
Last Answer : 40,000 bps
Description : In a FM system, the maximum deviation is 75KHz. Find bandwidth for modulating frequency i. fm=500Hz ii. fm=5KHz iii. fm=10KHz Draw conclusion for bandwidth of FM from answer.
Last Answer : Given deviation∆=75kHz i) fm=500Hz bandwidth B.W=2(∆+fm) =2(75k+500)=151kHz ii). fm=5KHz bandwidth B.W=2(∆+fm) =2(75k+5k)=160KHz iii) fm=10KHz bandwidth B.W=2(∆+fm) =2(75k+10k)=170KHz As the modulating frequency increases bandwidth also increases.
Description : A pure ALOHA Network transmit 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is .............. (A) 0.384 (B) 0.184 (C) 0.286 (D) 0.586
Last Answer : (B) 0.184
Description : Theoretical bandwidth requirement for FM system is: (1) Same as that of the modulating signal bandwidth (2) Twice of modulating signal Bandwidth (3) Thrice as of modulating signal Bandwidth (4) Infinite
Last Answer : Theoretical bandwidth requirement for FM system is: Infinite