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What is convolution in signals and systems?

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Description : What do you mean by linear convolution?

Description : What is the convolution filter?

Description : Is a convolution linear?

Description : What are digital signals used for?

Description : Find the phasors corresponding to the following signals

Answer : Find the phasors corresponding to the following signals

Description : For measurement of radio frequency ac signals __________ type meter is used

Answer : For measurement of radio frequency ac signals thermo-couple type meter is used

Description : Sampling of Analogue Signals

Answer : Sampling of Analogue Signals Sampling means splitting in regular interval to convert it in digital form. Sampling converts continuous signal to discrete signal. Actually the accuracy ... use. Using sampling we can store the analogue data in digital form.

Description : What is Neuro Fuzzy Systems?

Description : What are the different types of telecommunication systems?

Description : What is Electronic Systems Engineering?

Description : What are the different types of control systems?

Description : Define natural, mechanical, forced and induced draught systems.

Answer : Natural draught system: - When the fuel is burnt (combustion) in the furnace due to natural circulation of air, the draught is called natural draught. Mechanical draught system: -  In a mechanical ... combustion. OR If fan/blower is placed after the furnace then it is called as induced draught

Description : Precise control of reactive current flow entering the transmission and distribution systems can be minimized by using (A) synchronous condenser (B) static VAR capacitor (C) capacitor bank (D) thyristor switched reactor in parallel with capacitor

Answer : Precise control of reactive current flow entering the transmission and distribution systems can be minimized by using (A) synchronous condenser (B) static VAR capacitor (C) capacitor bank (D) thyristor switched reactor in parallel with capacitor

Description : Load compensation in power systems is a process to :  (A) Maintain better voltage profile (B) Increase short circuit capacity of the system (C) Generate required harmonics for loads like arc furnaces (D) Compensate for the line reactance

Answer : Load compensation in power systems is a process to : Maintain better voltage profile

Description : Skin effect is absent in which of the following transmission systems? A) Extra High Voltage (EHV) AC B) High Voltage Direct Current (HVDC) C) Both A and B D) None of these

Answer : Skin effect is absent in which of the following transmission systems? A) Extra High Voltage (EHV) AC B) High Voltage Direct Current (HVDC) C) Both A and B D) None of these

Description : Regulating-transformers are used in power systems for control of

Answer : Regulating-transformers are used in power systems for control of power flow

Description : State the objectives of tariff systems.

Answer : Objectives of tariff system: 1) Recover judiciously and legally capital investment made on electricity generation, transmission & distribution. 2) Recover judiciously and legally the cost of operation, supplies ... for high power factor. 8) Gain a suitable profit on the capital investment.

Description : Define: (i) Resolution, (ii) Calibration, with reference to electrical measuring systems.

Answer : Resolution The smallest increment in input (the quantity being measured) which can be detected with certainty by an instrument is called its resolution or discrimination.  OR It is ... the measuring instrument with standard instrument to find out the error in the instrument under test.

Description : I want to build circuit that produce sweep frequency from 10KHz - 11KHz - 12....... - 20KHz (as maximum) then start again at 10KHz - 11KHz - 12....... - 20KHz looping like this (2-3 seconds per loop) until the power turned off.

Description : Convolution of exp (-at) and exp(-bt) is  A) exp(-(a+b)t) B) exp(-abt) C) exp(-bt)-exp(at) D) None of these

Description : What is stable and unstable system?

Description : What do you mean by signal and system?

Description : What is a signal in science?

Description : What is the impulse response of the system?

Description : What is a time variant system?

Description : What is the meaning of LTI system?

Answer : The system which satisfies both linearity and time invarient is called linear time invarient (LTI) systrm

Description : What do you mean by signal processing?

Description : What are the signals that inform the operating system that some activity has taken place, called ? (1) Informers (2) Interrupts (3) Events (4) Handlers

Answer : Handlers

Description : What is an endoscope ? (1) It is an optical instrument used to see inside the alimentary canal (2) It is a device which is fitted on the chest of the patient to regularise the ... used for examining ear disorders (4) It is an instrument for recording electrical signals produced by human muscles

Answer :  It is an optical instrument used to see inside the alimentary canal

Description : The device in communication satellites which receives signals from an earth station and transmits them to different directions is (1) Transformer (2) Transistor (3) Transponder (4) Transducer

Answer : Transponder

Description : Compare signals and variables in VHDL

Answer : Sr. No Signals Variables 1 Signal objects are used to connect entities together to form model Variables are used for local storage in process statements and subprograms. 2 ... only. 5 Signals need more information so more memory Variables take less memory

Answer : Current transformers (CT) : Current transformer (CT) actually step down the high current to low current for the operation of relays. Current transformer is use for measurement of ... use for relay. This is about potential transformer.

Description : Explain how modulation reduces height of antenna and avoid mixing of signals.

Answer : Modulation reduces antenna height: For the transmission of radio signals, the antenna height must be multiple of λ/4 ,where λ is the wavelength . λ = c /f where c : is the ... will occupy different slots in the frequency domain (different channels). Thus, modulation avoids mixing of signals.

Description : Which of the following statements is NOT correct ? (A) Computer is capable of processing only digital signal (B) Computer is capable of analysing both quantitative and qualitative data (C) Appropriate ... for processing the data (D) Computer is capable of processing digital as well as analog signals

Answer : Answer: A

Description : Communication satellites are used to: (1) To transmit communication signals (2) To receive and redirect communication signals (3) To only receive communication signal (4) To provide information of national sources only

Answer : To receive and redirect communication signals

Description : Give purpose and location of following signals, 1) Warner: 2) Co-acting: 3) Shunt: 4) Detonating:

Answer : Ans: 1) Warner signal - When in 'on' position, it indicates that the signal ahead is at danger and driver must be prepared to stop at next signal. When in off' position it indicates that ... to the driver of approaching train. These are placed on the rails and explode when engine passes over them.

Description : Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees  

Answer : Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees  

Description : ______ signal is generated by combining RD and WR signals with IO/M.   (a) Control (b) System (c) Register (d) Memory

Answer : Control signal is generated by combining RD and WR signals with IO/M. 

Description : Elliptical, Spiral and Irregular are classifications of what type of astronomical systems?

Answer : ANSWER: GALAXIES

Description : Write the code of signals used in ranging with respect to : i) Correct position ii) Fix the ranging rod iii) Vertical position of ranging rod iv) Move slowly to left of observer 

Answer : i) Correct position : Both hands above Head and then Brought Down ii) Fix the ranging rod : Both Arms extended forward horizontally and the hands depressed briskly iii) Vertical position of ranging rod : 1 ... and moved to the Left iv) Move slowly to left of observer : Slow sweeps with Left Hand

Description : State any four codes of signals in ranging with their meaning. 

Answer : In guiding the assistant into line, the surveyor should use following code of signals. Sr. No. Signal by the Surveyor  Action by the Assistant  1 Rapid sweeps i.e. up and down ... . 10 Both arms extended forward horizontally and then depressed. Fix the ranging rod.

Description : Give any four code of signals used to direct assistant in ranging.

Answer : Sr. No. Signal Action 1 Rapid sweep with right hand Move right fast 2 Slow sweep with right hand Move right slowly 3 Right hand extended  Continue moving to ... head and moved down Correct position 8 Both hands forward and brought down Fix the point

Description : In the hypermedia database, information bits are stored in the form of: (A) signals (B) cubes (C) nodes (D) symbols

Answer : Answer: C Explanation: Hypermedia database model stores chunks of information in the form of nodes connected by links established by the user. The nodes can contain text, graphics, sound, full-motion video, or executable computer programs. 

Description : In radio-communication, the signals emitted by transmitting antenna are reflected on (1) stratosphere(2) ozonosphere (3) ionosphere (4) troposphere

Answer : ionosphere

Description : Red light is used for signals because it has (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Answer : long wavelength

Description : In 1901 who first transmitted radio signals across Atlantic

Answer : Marconi

Description : In CRO, Lissajous pattern will be a straight line, if the two signals are of same frequency with a phase difference of (a) 0° (b) 180° (c) 360° (d) All of these 

Description : The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a figure Which changes from ellipse to circle and back to ellipse with its major ... frequencies very close but not equal D) There is a constant but small phase difference between the signals

Answer : The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a figure Which changes from ellipse to circle and back to ellipse with ... following inference can be made from this The signals are sinusoidal with their frequencies very close but not equal 

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