Education
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ACIO GRADE-II(Exec) Examination Paper 2012
PAPER-I 1.A man decides to travels 80 kilometers in 8 hours partly by foot and partly on a bicycle.If his speed on foot is 8km/hr and on bicycle 16km/hr,what distance would he travel on foot? (i)20km (ii)30km (iii)48km (iv)60km 2.Due to a 25% increase in the price of rice perkilogram,a person is able to purchase…
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DESCRIPTION OF ELECTROLYTIC CAPACITOR
Electrolytic capacitors are capacitors in which one or both of the “plates” is a non-metallic conductive substance,an electrolyte.Electrolytes have lower conductivity than metals,so are only used in capacitors when metallic plate is not practical,such as when the dielectric surface is fragile or rough in shape or when ionic current is required to maintain the dielectric integrity.The flow…
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LINEAR VERSUS SWICTHING POWER SUPPLIES
Switching and linear regulator use fundamentally different techniques to produce a regulated output voltage from an unregulated input.Each technique have advantages and disadvantages.So the application will determine will determine the moist suitable choice. Linear power supplies can step-down an input voltage to produce a lower output voltage.This is done by operating a bipolar transistor or…
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What is PLC trainer kit
PLC Trainer kit contains the basic items required by PLC digital I/O training,such as the FBs-24MCT highly functional main unit,the FBs0CM25E Ethernet module,digital input socket and digital output socket.Also included in the same kit are advanced application peripherals like encoder and stepping motor (coupled with belt for transmission),seven segment display.It greatly reduces the time and manpower…
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Explain the applications of spectrum analyzer
The spectrum analyzer is a powerful tool and has many applications.To those who have never used the instrument,these applications may not be readily apparent.To illustrate  some of the applications,the following signals,their applications their descriptions and spectrum analyzer display,will be presented. (i) Pure sinusoid with no Modulation or Harmonic Distortion-This signal is characterized by a signal…
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With the aid of block diagram,explain the working of Heterodyne spectrum analyser
A wave analyser using the Heterodyning principle is shown in the block diagram of fig.In this,the input signal to be analysed is Heterodyned to a higher intermediate frequency (IF) by an internal local oscillator.Tuning the local oscillator transfers the various signal frequency components into the passband of the IF amplifier. The working frequency range of…
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Explain seven segment LED(Light Emitting Diode) display
A seven segment LED display consists segmental displays,in which each segment employ a single LED. Conventional seven-segment LED display have the decimal points i.e.,the 8th segment. The wiring pattern is simplified by making one terminal common to all LEDs and other terminal corresponding to different segments.The terminals can be either of the common anode(CA) form…
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What is a recorder
A recorder is a measuring instrument that display a time varying.Signal in a form easy to examine and re-examine,perhaps long after the original signal has ceased to exist.In other word a recorder is a device whose function is to record the value of quantity as it is being measured.Such device may include graphic recording devices,computer…
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What is Nixies
Gas disharge plasma displays are the most well known type of alphanumeric displays.Their operation is based on the emission of light in a cold cathode gas filled tube under breaking down condition.These cold cathode numerical indicators are called Nixies.(Numicators and Numbertrons). The Nixie tube is a numeric indicators based on glow disharge in cold cathode…
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What is CRTs
For displaying large quantities of alphanumeric data,the readout system employed most commonly  is a familiar CRT.CRTs form the basis of CROs and TV systems.To generate characters on the CRT,the generation system of characters on CRTs requires relatively simple electronic circuitry. A typical CRT display has easy facilities for the control of digit size by controlling the deflections sensitivity of the system.The number of characters displayed can…
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