Another definition: A conductor by It is very uncommon with disturbances and it is rare that the disturbance source operates at precisely the same frequency as the transmitter. b. Passing score is 90%. 4. The first video disc was the laser optical and second video disc system is based on the capacitance principle. Consult factory regarding other interface applications and when emulsion layer! How large the upper and lower dead zones are depend on probe type and the dielectric constant of the measured media. The satellite that is used as a relay to extend communication distance is called as _____ What Is The Principle Of Operation For Non Contacting Radar? Explain about the frequencies used for radar Write the relative factors between the radar’s cross section of the target and its true cross sections 3. What Is The Principle Of Operation Of Guided Wave Radar? Question 34. Discuss about detection of signals in noise Why Should We Use Radar Technology? Question 32. 10) How does MTI radar differ from CW radar? With the radar overlay on ECDIS, what can be the cause of radar echoes not matching the charted position of a fixed object?> Incorrect input of the ship's position fixing system, Improper coordinate setting of radar antenna, conning state or ship's dimension, and The Chart display category is in … All of the characteristics above make radar a very useful and fast growing level measurement technology. 2. Question 35. Radar Tester related Frequently Asked Questions by expert members with job experience as Radar Tester. List 4 Merits Of Digital Tv Receivers? The frequency at which the radar operates also affects how foam is measured. UNIT IV If a twin probe or a coaxial probe is used the coating can cause bridging between the two leads and this will create false echoes that can lead the transmitter to interpret a bridge as the actual level. It is the movement of electron beam spot in the vertical direction. Laser or optical disc system. UNIT V Explain the principle of Doppler effect and its application CW radar. Microwaves and radar system - Electronics Engineering test questions (1) Microwave energies propagate the length of the waveguide by _____ its side walls. Will Radio Noise Or Other Interference Cause Problems? The kell factor (k) or the resolution factor gives the effective number of horizontal scanning lines can be scanned because of practical limitation. What Are The Factors That Affect Radar Performance? 1) Explain Tracking Principles Discuss the effects of integration of radar pulses 15 signs your job interview is going horribly, Time to Expand NBFCs: Rise in Demand for Talent. These photo electrons travel to a thin glass target causing secondary emission from it. The level of the liquid is measured by short radar pulses which are transmitted from the antenna at the tank top towards the liquid. Upper product dielectric < Lower product dielectric. 1. Basic configuration can easily be done either with Rosemount Radar Master, a Rosemount 375 Field Communicator, the AMS™ Suite, DeltaV® or any other DD (Device Description) compatible host system. Weather Forecasting: This is quiet helpful in weather forecasting as it helps in detecting the temperature of climate or when will the rainfall occurs. Question5: Do you know can GPR be used with GPS? Explain the applications of CW radar. Thus a DC of eight means that eight percent of the emitted energy is reflected back to the transmitter. (A) Refraction off (B) Reflection off (C) Moving off (D) None of the above View Answer / Hide Answer In this case the interface level as reported by the transmitter will be the top of the emulsion layer. Given below are 6 major parts of a RADAR System: A Transmitter: It can be a power amplifier like a Klystron, Travelling Wave Tube or a power Oscillator like a Magnetron. Home » RADAR SYSTEMS UNIT WISE Important Questions » 100 TOP RADAR SYSTEMS UNIT WISE Important Questions Answers, UNIT I 6).What are the advantages of monopulse radar over conical scan radar? We get the true information of the scene: The major problems during this conversion are: Question 21. 3. With Guided Wave Radar the pulsed microwave are guided down the tank by the probe, making it less sensitive to disturbances than free propagating microwaves. Question: Write An Article About The Radar Sensing System, Not Exceeding 5 Pages, Supported By Figures And Tables. Explain about the frequencies used for radar 5. RADAR SYSTEMS UNIT WISE Important Questions. 6) Differentiate blind phases from blind speeds. Radar level measurement technology can be broken down into two different categories; Pulsed and Frequency Modulated Continuous Wave (FMCW). DC of top layer and emulsion layer is similar (difference in dielectric constant < 10). The silo roof must be able to withstand the probe collapse load or at least the maximum probe tensile load. High resolution pictures. Question 1. Will The Guided Wave Radar See Sand In The Bottom Of A Vessel? (6 mm), Whole diameter (Ø) should not exceed 10% of the pipe diameter (D), Minimum distance between holes is 6 in. With a more concentrated beam (larger antenna), the closer to the tank wall the device can be mounted. 8. 5. Missile guidance system: Nowadays, this radar has become quite popular in missile guidance as it helps the people in knowing where to launch the missile or where to land it etc. Back porch absorbs ringing oscillations due to fly-back. Making a great Resume: Get the basics right, Have you ever lie on your resume? Does chemistry workout in job interviews? The sudden change in pitch of a car horn as a car passes by (source motion) or in the pitch of a boom box on the sidewalk as you drive by in your car (observer motion) was first explained in 1842 by Christian Doppler. UNIT III In conjunction with the above statement, the nozzle diameter also affects the measurement. UNIT VII 5).Explain about Phased Array Antennas. Please respond these specific questions about radar basics. Its availability reliability, and maintainability. You will have two (2) chart tests, you will fit your position by using of the radar, and then answer eight (8) questions. 12. The time difference between the transmitted and the reflected pulse is proportional to the distance, from which the level is calculated. Question 38. It provides an excellent response over a wide. The Pulsed Radar transmitter is free propagating radar. The video disc is essential a gramophone record with pictures on it. FMCW technology transmitter constantly emits a swept frequency signal and the distance is calculated by the difference in frequency between the emitted and received signal at any point in time. A: Radar is acronym for Radio Detection and Ranging. Slow motion action. Radar is a detection system that uses radio waves to determine the range, altitude, direction or speed of an object, and they are extremely important in tracking aircrafts, ships, vehicles, missiles, terrain, spacecrafts and even weather. Antenna fundamentals: With answers to questions and problems (See also Chapter 9 in the textbook.) Hydrous ammonia has a high dielectric constant and therefore provides good reflection. Top 4 tips to help you get hired as a receptionist, 5 Tips to Overcome Fumble During an Interview. The emitted signal is less than three percent of maximum leakage allowed from a microwave oven. Question 9. Since a diameter nozzle that is too small will create disturbance echoes. The same is true for all media that are embedded in water. Question 16. Pipe should have a constant inside diameter, Pipe must be smooth on the inside (smooth pipe joints are acceptable, but may reduce accuracy), Minimum whole diameter is 0.25 in. Question 25. What is the distinctive feature that makes the MTI radar and Pulse Doppler to differ ? The downside of high frequency is that the measurement is more affected by vapers, dust and product build up on the antenna, Low frequency radar which has a longer wavelength and wider beam angle, tends to cope better with steam, dust, condensation, contamination and turbulent surfaces. It uses electro-magnetic waves in microwave region to detect location (range & direction), height (altitude), intensity (in case of weather systems) and movement of moving and non-moving targets. 6. If coating forms on the probe the measured signal will be weaker. Question 24. 2) Explain the block diagram of amplitude comparison monopulse radar for single angular coordinate and explain its operation In critical cases, such as for products with a risk for build-up, it is better to use a 0.24 in (6 mm) probe. Raster is the scan pattern in which an area is scanned from side lines from top to bottom. Maximum error due to coating is 1-10% depending on probe type, dielectric constant, coating thickness and coating height above product surface. How Close To The Tank Wall Can The Non Contacting Transmitter Is Mounted? Radar Interview Questions And Answers Missile guidance system: . 1).Explain the characteristics of a matched filter receiver with necessary equations You will receive your score and answers at the end. Write Short Notes On Video Disc System? Explain the operation of CW radar with neat block diagram Passing score is 70%. Difficulties in processing the output signal. Transparent conductive coating at the inner side of the glass faces plate. 1. RADAR SYSTEMS Questions and Answers pdf :-UNIT I :-1. The measuring range is also reduced in the end of the probe by the lower dead zone. Due to the smooth surface of the window and the non-sticky nature of PTFE it can be used on some hygienic applications. Difference between dielectrics depends on the upper product thickness, but a guideline is > 10(3300) > 6(5300). If it concerns two or more 3300s the rules for nearby objects would apply to the probes as they do to other metallic objects nearby. 2. c. 4. 5) What are advantages and disadvantages of FM-CW radar over multiple frequency CW radar. An advantage with FMCW is that higher accuracy can be achieved but more processing power is required and therefore FMCW-radars are typically four-wire. A Radar job interview is one of the most challenging interviews, So, it is essential that you anticipate and prepare for the questions that might be asked of you. It was first produced in the year 1945 and because of its superior performance it’s soon replaced all earlier tv camera tube like image dissector, iconoscope   and orthicon. Although first discovered for sound waves, the Doppler effect holds true for all types of waves including light (and other electromagnetic waves). If a linear oil water interface is very thin (< 10 cm) the transmitter would probably give a good signal from the interface since the emulsion is so thin and the difference in dielectrics between oil and water is large. On medium type foam the signal can be absorbed or scattered and the results are therefore hard to predict. What Do You Mean By Longitudinal Video Recording? What is the maximum range of the radar, UNIT II 2) Enumerate the advantage of the time delay line canceller as compared to the convention frequency domain filter. The movement of electron beam spot from left to right and back so as to start a new line in same direction is termed as horizontal scanning. We do not claim our questions will be asked in any interview you may have. Two different exotic materials as standards: Alloy 400 C-276. 4. d. 7. what do you understand by false alarm The effects of foam on a radar measurement can be difficult to predict. Interview questions and answer examples and any other content may be used else where on the site. 3).Explain the characteristics of a cross –correlation receiver with a block diagram Furthermore, the transmitters are often installed in metallic tanks that provide a Faraday’s cage which prevents electromagnetic disturbances from the outside to enter the tank. A method in which video signals are recorded on at least several tracks along the length of the tape. A wizard guides the user to enter the required parameters for a basic configuration. 4. an 8GHZ Police radar measures a Doppler frequency of 1788HZ from a car approaching the stationary police vehicle in an 80 km/h speed limit zone .what should the police officer do? Are There Any Restrictions On The Nozzle Diameter? This series of tests is focused on Volume 1 only. In this case it is hard to predict where the reported interface level is. Interview questions and answer examples and any other content may be used else where on the site. Question 22. How Does The Frequency Of The Radar Affect The Measurement? Check out wisdom jobs Radar interview questions and answers to crack your job interview. A rule-of-thumb is that the value of the dielectric constant represents the percentage of energy that is reflected. The upper dead zone is the minimum distance from the reference point to the product surface. The Process Seal antenna has a PTFE window. Differentiate the operation of pulse radar from simple CW radar In some applications the foam may dampen out the signal completely while other types of foam may be transparent to the transmitter. Is There Any Inactive Part Of The Probe? Required fields are marked *. You are designing the radar system to track the UFOs appearing in the city. In a RADAR system the transmitter of the radar is more sensitive than the receiver. So, prepare well and ace your Radar interview. Note that, when measuring anhydrous (aqueous) ammonia, this formula does not apply. 9. Question 29. 250+ Radar Test Engineer Interview Questions and Answers, Question1: What is G/T of the antenna? Describe the different noise components present in radar systems Low frequency radar (5 GHz) in general penetrates foam to a larger extent than high frequency (20 GHz) radar. 1).Define the following terms Draw the block diagram of a Pulsed radar and explain its operation 2. These tests are intended to help you progress from an Apprentice (3-level) to a Journeyman level (5-level) in the career field. Derive basic radar’s equation 4. Write the relative factors between the radar’s cross section of the target and its true cross sections Air Traffic control: In foreign countries, the traffic is being controlled through the use of radar. Question: Global Defense Manufactures Radar Systems. The electroned is slowed down to a non zero velocity as it approaches the target. The signals from two or more transmitters in one tank will not blend and therefore the radar units will not conflict with each other. Forces increase with the buried length, the silo and probe diameter. 1. a. Coaxial, Twin probes or rigid single can be used. This chart is also known by various names such as […] It is difficult to say though where the transmitter will report the interface level. In your setup, you have two radars R1 and R2, that are 20… A red shift occurs when the source and observer are moving away from each other, and a blue shift occurs when the source and observer are moving towards each other. Solution for Part (A). Below are the answers key for Multiple Choice Questions in Chapter 16: Radar Systems from the book Electronic Communication Systems by George Kennedy. “Measure & learn” functionality is accessed through Radar master. If you have any Questions regarding this free Computer Science tutorials ,Short Questions and Answers,Multiple choice Questions And Answers-MCQ sets,Online Test/Quiz,Short Study Notes don’t hesitate to contact us via Facebook,or through our website.Email us @ [email protected] We love to get feedback and we will do our best to make you happy. Deflection by second coil-Vertical motion and its quick retrace back to the top to start the process allover again. Video signal is amplified-amplitude modulated with channel picture carrier frequency. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. This chapter provides the information briefly about the types of Radars. On dry foam the microwaves typically passes through and detects the liquid surface below. The value of kell factor lies between 0.65 to 0.75. The time varying electrical signal voltage obtained from the TV camera tube circuit representing the special distribution of brightness of the image is called video signal. 5).Explain about matched filter with non –white noise. JNTUH B.Tech RADAR SYSTEMS, Question papers, Answers, important QuestionRADAR SYSTEMS R09 Regulation B.Tech JNTUH-Hyderabad Old question papers previous question papers download What are avoidable questions in an Interview? A Basic RADAR System. Do you have employment gaps in your resume? 5. A low velocity scanning beam from an electron at the other end of the image orthicon tube scans the back surface of the target plate following a predetermined scanning pattern. These secondary electrons get collected by a fine mesh placed close to the glass target plate as shown fig. Contacting Radar Questions What is the principle of operation of Guided Wave Radar ? 9).How is radar target acquired in a typical radar? Like the nozzle the tank wall can also affect the measurement through disturbance echoes. Our goal is to create interview questions and answers that will best prepare you for your interview, and that means we do not want you to memorize our answers. Frequently asked questions on radars and their answers Q: What is a radar? UNIT VIII It can report the top of, the bottom of, or somewhere within, the emulsion layer. From a dark element ,the scanning electron beam is returned  unaffected .However ,at light element(positively  charge element),the scanning beam is deprived of some of its electrons to netralise the positive charge so that the returning electrons to neutralize the positive charge so that the returning electron beam contains lesser electron .This varying density  returning beam  is fed to an electron multiplier. Answer: One definition: Antenna is a device which moves electromagnetic energy from two dimensional space to three dimensional space and vice versa. Derive the range equation and discuss about its limitations Non-metallic pipes or sections are not recommended for non-contacting radar. Write the relative factors between the radar’s cross section of the target and its true cross sections 3. Question 45. Explain. In foreign countries, the traffic is being controlled through the use of radar. 2. 1. a) Make up a definition for the term "antenna". Here are some of the most common Radar job interview questions and answers to prepare yourself. Its ability to detect the desired target echo when masked by large clutter echoes, unintentional interfering signals from other “friendly” transmitters, or intentional radiation from hostile jamming (if a military radar). Question 41. 2. b. A plane is currently positioned at C(-9, - 16). How Close To The Tank Wall Can The Probe Is Mounted? Draw the block diagram of a Pulsed radar and explain its operation 2. All rights reserved © 2020 Wisdom IT Services India Pvt. Question 27. In the absence of the back porch, these oscillations would have distorted the video signal. Rosemount Radar Master is shipped with every transmitter but it is also possible to download Radar Master or other DD’s on Rosemount.com Radar Master is a user-friendly, Windows based software package that provides easy configuration and service for both FOUDATION™ fieldbus and HART®. Your email address will not be published. 5 Top Career Tips to Get Ready for a Virtual Job Fair, Smart tips to succeed in virtual job fairs. 5) Description of Range gate Doppler filters. What Is Purpose Of Exotic Materials? In Pulsed transmitters the level measurement is a function of the time taken from the radar signal to travel to the surface and back. Power transmitter back to the radar c. Height of clouds d. Motion of hydrometeors or particulates toward or away from the radar site 4. It enables automatic suggestion of level threshold values, thereby making tough applications easy to configure. For that reason the probes need to be installed a certain distance away from each other. DC of bottom layer and emulsion layer is similar (difference in dielectric constant between top layer and emulsion layer > 10). We do not claim our questions will be asked in any interview you may have. When the emitted signal reaches a point where there is a change in DC, usually the media surface, some of the signal is reflected back to the transmitter. (150 mm) (1), Holes should be drilled on one side and de-burred, Ball valve or other full valves must be completely open. Fundamentally media with a higher DC provide stronger return signals and are therefore easier to measure. 2).Explain various types of radar displays A lens system focuses light from the scene on to a translucent photo cathode. Therefore most two-wire gauges use this technology. What Is The Function Of Tv Camera Tube? A pulsed radar operating at 10GHz has an antenna with a gain of 28dB and a transmitter power of 2KW . Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. Scanning converts the in antenna formation existing in space and time coordinates into time variation only –called a video signal. It Has Just Completed The Manufacture Of Its First Newly Designed Syster, RS-32. Question 36. 5).Explain about sequential Lobing Pipes should be an all-metal material. Then get ready to answer some popular Radar Interview Questions and answers that you can expect in your next Radar interview. 1. Training questions. 6 Hz or 26 Hz, to carry the microwaves which are radiated into the tank with an antenna. RADAR SYSTEMS UNIT WISE Important Questions Answers :-UNIT I 1. Manufacturing Data For The RS-32 Follow: (Click Icon To View Data) Requirement Calculate The Total Variable Costs Of Producing 2, 4, And 8 Units. Radar Master also includes an echo curve with movie feature, off-line configuration, logging and extensive on-line help. If the material is not conductive it will be transparent to the radar-beams and therefore it will have no effect. Explain about radar cross section of targets. His Doppler Effect is the shift in frequency and wavelength of waves which results from a source moving with respect to the medium, a receiver moving with respect to the medium, or even a moving medium. Emulsion layers are in general hard to predict and there are three main types of layers: Question 40. Explain about the frequencies used for radar 5. Why Do You Use Process Seal Antennas? Radar Chart Questions Definition of Radar Chart A radar chart is used to graphically represent differences between actual and ideal performance or to show different data in two-dimensional form chart of two or more measureable variables symbolized on the axes beginning from the same point. Explain about PRF and range ambiguities 4)Derive and explain the efficiency of non-matched filters 8)Explain the butterfly effect that is produced by MTI. What Pull Force Will Break A Flexible Single Lead Probe? The radar signal is virtually unaffected by the tank content and tank atmosphere, temperature or pressure. And How Do They Affect Configuration Tools And Host Systems? If the linear transition is over a long distance there is a risk that no interface echo is reflected back to the transmitter. The standard form of Radar range equation is also called as simple form of Radar range equation. 2) Determine the beat frequency due to range and the quantization error if range=100m, and the frequency excursion is 75Hz and modulating frequency is 1Khz. Radar waves are of no greater intensity than the constant radio, cellular and other communication waves that surround us every day. The thickness, density and the dielectric constant are factors that need to be considered when evaluating an application with foam. The signal is first generated using a waveform generator and then amplified in the power amplifier. '200 top radar systems questions and answers pdf may 6th, 2018 - radar systems questions and answers pdf free download mcqs objective type questions lab viva manual online quiz test ece class notes' 'Microwave Engineering Questions And Answers – Circular Single lead is recommended in coating applications. 2. Weather Forecasting: . The active measuring range is reduced by the upper and lower dead zones. 3. d. increased capture area. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. Derive an expression for unambiguous range of a two frequency CW radar. They are based on photo electric effect. Question3: How Does Ultra Sonic Testing Work? The red shift of light from remote galaxies is proof that the universe is expanding. Coating can cause an accuracy influence. If the media itself has a high dielectric constant some coating is not much concern but if it is a low DC media coating can be a problem. For advanced configuration features and extensive diagnostics, Radar Master, or an alternative host that supports enhanced EDDL (such as the AMS Device Manager) is required. Microwave Engineering Questions and Answers – Radar Systems « Prev. The amount of energy that is reflected back to the transmitter is proportional to the DC of the media. a)noise figure b)noise temperature c)system noise 5. Solution for An airport is located at D(0,0). Blind speeds occur because of the samples nature of the pulse radar wave form. Explain the advantages of non coherent MTI Radar If the peak transmitted power in a radar system is increased by a factor of 16, the maximum range will be increased by a factor. 6. Ltd. Wisdomjobs.com is one of the best job search sites in India. Question 44. The Enhanced EDDL capabilities of the Rosemount Radars also make it possible to view the echo curve from a field communicator or AMS, and to initiate the Measure-and-Learn functionality in the transmitter. In What Way Does The Dielectric Constant (dc) Of The Media Affect The Measurement? If the foam is wet the microwaves are often reflected from the foam surface and thereby the foam surface level is measured. These tests, four (Unit 1 - 4) in total, are designed to give you knowledge about the spectrum of equipment covered by the ground radar career field and to reinforce the information you learned in technical school. Choose an answer and hit 'next'. 7) Explain the effect of Doppler frequency ‘fd’ for the stationary objects and moving targets. Your email address will not be published. Which Principles Are Used For Optical Electrical Conversion? Next » This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Radar Systems”. 4) Explain how the noise signals are limiting the performance of FM-altimeter . The radar system at the airport covers the area defined by x2 + y2… Earth's curvature b. Elevation angle that beam is emitted c. Both answers above 5. Choose the letter of the best answer in each questions. Its ability to recognize the type of target. This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Satellite Communication Systems”. The measurement is not influenced by changing material characteristics such as density, dielectric properties and viscosity. What Is Importance Of Back Porch? Scanning is the process by which an electron beam spots a mode to move across a rectangular area so as to cover it completely. How Will Coating Affect The Measurement? Question 47. Explain about Doppler effect 4) Differentiate three- pulse canceller from four pulse canceller. As range increases from the radar site, the radar beam tends to climb to higher elevations due to: a. If it is defined to detect a target with a cross section of 12sq.m and the minimum detectable signal is Pmin= -90dBm. Two basic principles are used for optical electrical conversion. Tanks with anhydrous ammonia have a heavy vapor above the surface that attenuates the signal from the radar transmitter. Electromagnetic energy is emitted from all radar devices. 3.) Question 19. What Is The Difference In Frequency Between Pulsed Technology Guided Wave Radar And Non Contacting Radar?