This test is Rated positive by 88% students preparing for Electrical Engineering (EE).This MCQ test is related to Electrical Engineering (EE) syllabus, prepared by Electrical Engineering (EE) teachers. In this page you can learn various important magnetism and electromagnetism multiple choice questions answers, magnetism and electromagnetism mcq , short questions and answers on magnetism and electromagnetism , sloved magnetism and electromagnetism objective questions answers etc. D. 4 ¾” dia. Radiation shieldingis based on the principle of attenuation, which is the ability to reduce a wave’s or ray’s effect by blocking or bouncing particles through a barrier material. D All of these . A. a) X-rays. Brass B. Mcq Added by: Muhammad Bilal Khattak. In the nuclear power industry, comprehensive shielding is essential. 2) The commonly used materials for HV insulation is. The commonly used material for shielding is a) Lead or concrete b) Lead and tin c) Graphite or cadmium d) Thick galvanized sheets Q8.The following material is commonly used for making locating and clamping devices a) High carbon steel b) Low carbon steel c) High speed steel d) Die steel. The commonly used material for shielding is. ANSWER: a. Ans: c. 17. This is because the strength and ductibility of a composite tend to decrease with increasing filler content when the filler–matrix bonding is poor. Previous question … However, once you reach a certain limit, adding steel thickness won't improve your shielding much. Soft Iron E Caluminium D. Copper. Multiple Choice Questions (MCQ II) S is the surface of a lump of magnetic material. Typical materials used for electromagnetic shielding include sheet metal, metal screen, and metal foam. A. toppr. A. lead or concrete The commonly used material for shielding is (a) lead or concrete (b) lead and tin (c) graphite or cadmium (d) thick galvanized sheets (e) black carbon papers. With magnetic materials, the EMI is drawn into the magnetic field of the shielding. As mu-metal is extremely … It is having comparatively high resistance. b) Lead and tin. (A) Marble (B) Lime stone (C) Compact sand stone (D) Granite. (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. B. Aluminium . a unity gain inverting amplifier. (A) Boron (B) Gallium (C) Indium (D) All of the above Q2.In “p” type material, minority carriers would be: (A) Slower (B) Dopants (C) Holes (D) Electrons Q3. Silicon is the most widely used semiconductor material. 1. Arc welding is a welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals. A. Correct Answer : D. Share this question with your friends. D. thick galvanised sheets Design the size of solid steel to be used for 500 Hp, 250 rpm application if the allowable torsional deflection is 1° and the allowable stress is 10,000 psi and modulus of rigidity is 13 X 106 Psi. The commonly used semiconductor elements are silicon, germanium, and gallium arsenide. Select one: a. Once it gets below a critical thickness, the material … asked Mar 29, 2018 by anonymous. The main interest of shielding in nuclear reactor is protection against (a) X-rays (b) infra-red rays (c) a, P, and y rays (d) neutrons and gamma rays (e) electrons. What total thickness is needed to reduce the fraction transmitted to approximately 1%? Get Instant Solutions, 24x7. A. copper Metal Consideration . B. C - Linked Lists. Ans: d. 19. Electric holders must be mechanically strong. What is the main drawback of using paper as the insulating material? Neutrons can be made less harmful through a combination of elastic and inelastic scattering, and most neutron barriers are constructed with material… a unity gain non inverting amplifier. In what decade was the first transistor created? Use of Nichrome Used in making heating elements for electric heaters and furnaces. Mcq unit ii 1. This was last updated in August 2014. The base material is inherently aesthetic and does not require post plating to make it corrosion resistant or solderable. The columns could be made of glass or metal. Answer: c. Explanation: Diatomaceous earth is the commonly used support material for the packed column in gas chromatography. C. Soft Iron. Standards are specifications for cable insulation and coverings are developed and set forth in the publications of ASTM, Underwriters Laboratories, Inc. (UL), and Insulated Cable Engineers Association (ICEA), and oth- ers. Footnoted are common alternative gases. An isolated silicon atom has … Choose the letter of the best answer in each questions. Answered By . Question: One Of The Commonly Used Material For Shielding Magnetic Related Devices Is Select One A. Q4. Stress shielding or stress protection occurs when metal implants, such as bone plates and screws, are used to repair fractures or in joint replacement surgery. Question is ⇒ The commonly used material for shielding or screening magnetism is, Options are ⇒ (A) copper, (B) aluminium, (C) soft iron, (D) brass, (E) , Leave your comments or Download question paper. The commonly used material for shielding or screening magnetism is (a) copper (b) aluminium (c) soft iron (d) brass . Answered By . The commonly used material for shielding is _____. A. copper B. aluminium C. soft iron D. brass. The magneto-motive force is. The commonly used semiconductor elements are silicon, germanium, and gallium arsenide. It has 14 protons and 14 electrons in orbits. The most commonly used insulating materials for low and medium voltage cables is . The commonly used material for shielding or screening magnetism is. View Answer Discuss. When a 1mm thick piece of lead is placed in front of an x-ray tube, it is observed that the fraction of x-rays transmitted is 20%. jackets, shields, sheaths, and other materials used in the assembly of a cable. Mcq Added by: Muhammad Bilal Khattak. Note Nichrome is best suitable and ideal material for making heating element. Shielding effectiveness, that is how well a shield reflects or absorbs/suppresses electromagnetic radiation, is affected by the physical properties of the metal. ... lines of B cannot end on any material and perfect shielding is not possible. D. thick galvanised sheets. Below . What is the limit of the conductor cross section when paper insulation is used? answr. Is hygroscopic . The flow of an electric current. B. Show transcribed image text. Equal to Unity . IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. 5. C - Matrices. 18. 0 votes . A. lead or concrete. Magnetism and Electromagnetism Magnetism and Electromagnetism. commonly used shielding materials is available in many resources, such at the National Institute of Standards (NIST) XCOM database of attenuation coefficients1 and Health Physics and Radiological Health.2 Ultimately, selecting the most appropriate shielding material for a given source of ionizing radiation will require knowledge of the source of radiation, application of attenuation data … Ans: d Which of the following has more fire resisting characteristics? The commonly used material for shielding or screening magnetism is (a) copper (b) aluminium (c) soft iron (d) brass . The material must be of high electrical resistance and of low hysteresis loss. Copper. B. lead and tin. 50 mm 2 b. MRI is a non-invasive way to take a 3D images of a person for diagnostic purposes. Answer to The commonly used material for shielding is (a) lead or concrete (b) lead and tin (c) graphite or cadmium (d) thick galvanized sheets (e) black Upvote(4) How satisfied are you with the answer? © Copyright 2016-2020 - www.PakMcqs.com/. C. 4 7/8” dia. The commonly used material for shielding is _____. 120°C c. 130°C d. 155°C. B. An explanation of some of the dielec- tric terms is in Appendix 8A. Power Plant Engineering MCQ Question with Answer ... B To produce fissionable material . In the case of the MIG and metal core processes, it also identifies shielding gases depending on which mode of metal transfer is being used. 187. 2) The most commonly used amplifier in sample and hold circuit is. Magnetic materials must be used for EM shielding in environments where the magnetic fields are slowly varied below the 100Khz range as a Faraday cage-type solution is ineffective in that situation. Historically, radiation shielding materials have been manufactured from lead (Pb). Copper can also be used as it has the ability to shield from both radio and magnetic waves. The commonly used raw material in the manufacture of cement, is (A) Slate (B) Sand stone (C) Lime stone (D) Basalt Answer: Option C Question No. MEDIUM. This table is not meant to be an exclusive list of shielding gases used for arc welding. Upvote(4) How satisfied are you with the answer? The commonly used material for shielding or screening magnetism is (a) copper (b) aluminium (c) soft iron (d) brass Ans: c. 55. a. D. thick galvanised sheets. This problem has been solved! Your email address will not be published. Explanation: No explanation is available for this question! C To propel ships, submarines, aircrafts . a. Q19. Your answer. Vertebroplasty is a procedure done for (a) Spine (b) Brain (c) Heart (d) Artery. Basically the matrix is more resistant to cracking and larger tiles can be made. asked Mar 29, 2018 by anonymous. For the purpose of this post, we will focus on the three different types of materials used in manufacturing x-ray attenuating garments such as aprons, vests, and skirts. 17. Applications of insulating materials - Electrical Engineering (MCQ) questions and answers. Mild steel. 17. a) Glass b) Metal c) Diatomaceous earth d) Stainless steel. The material most commonly used for shielding is. 64. The commonly used material for shielding or screening magnetism is. Slightly less than unity . Transformer Core Losses 63. This will help us to improve better. a) an astable multivibrator. Dec 24,2020 - Test: NMOS & CMOS Fabrication | 20 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. C - Stacks and Queues. The grain orientation reduces the hysteresis loss of the power transformer. Semiconductors are neither conductors nor insulators. Control and instrumentation cables may feature a type of electromagnetic shielding material, which is wrapped around the cable underneath the outer jacket. Answer. D. Brass View Answer. C Programs . Soft Iron E Caluminium D. Copper. The effectiveness of the shield will depend on the material used, thickness of the material, and what frequency the waves that need to shield are. Q17. Q18. View Answer / Hide Answer. The most effective shielding material available is mu-metal — an alloy of 77% nickel, 16% iron, 5% copper, and 2% chromium — which is then annealed in a hydrogen atmosphere to increase its permeability. C. The sum of all currents embraced by one line of magnetic field c. Has a very low insulation resistivity. In some cases where saturation is an issue, multiple layers of material are used. Ans: c. 17. 9. The commonly used material for shielding or screening magnetism is____________? A faraday bag is made of flexible metal sheets that block EMF. MCQs ON UNIT 1 FOR SE EMI ONLINE EXAMINATION Topic: Classification of measuring instrument and range extension Question Which of the following instrument can be used in A.C. bridges for less frequencies up to 200 Hz only A Head phone B Tunable amplifier detector C Vibration galvanometer D All of the above Answer C Question Which of the following bridge is used in strain … Can you give answer … Shielding serves to prevent electrical noise from affecting the transmitted signal, and to reduce electromagnetic radiation emission from the cable itself. Shielding is typically comprised of metal braiding, metal tape or foil braiding. Unit to measure Catheter diameter is (a) Meter (b) Angstrong (c) French (d) Sievert Lead is one example of a predominantly used material for radiation shielding, but other metals such as cadmium also offer unique properties and applications. Gelfoam is a material commonly used for (a) Embolisation (b) Aspiration (c) Drainage (d) Coiling. The most common uses of RF Shielding in the medical industry is for Magnetic Resonance Imaging (MRI). 474 The rocks formed from molten magma, are called (A) Sedimentary rocks (B) Igneous rocks (C) Metamorphic rocks (D) None of these Answer: Option B Question No. A. lead or concrete. 73 views. Charged particles may be attenuated by losing energy to reactions with electrons in the barrier, while x-ray and gamma radiation are attenuated through photoemission, scattering, or pair production. C. Soft iron. Question: One Of The Commonly Used Material For Shielding Magnetic Related Devices Is Ed Select One On A Brass B.copper C. Aluminium D Soft Iron When Gradient Of A Scalar Function Is Zero, Then The Function Lies Parallel To The X-axis Or Y-value Is Constant 50 Select One: A. The main interest of shielding in nuclear reactor is protection against (a) X-rays (b) infra-red rays (c) a, P, and y rays (d) neutrons and gamma rays (e) electrons. 3) A 1 ms pulse can be stretched to 1 s pulse by using. Which of the following is not an ore of copper ? C. Cast iron ... D. Types of condenser used. Reflector in nuclear plants is used to Expert Answer . See the answer. This is a follow on development to NASA’s PICA. Correct Answer. 65. 18. Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Applications of insulating materials; 1) The temperature limit for class F insulation is. Computer Architecture MCQ DBMS MCQ Networking MCQ. c) A, P, and y rays. Silicon is the most widely used semiconductor material. A. Show transcribed image text. D. Brass. Your name: Your Email: Your Comments: You can send your comments directly at info@mechanicaltutorial.com. This section … 2. 18. Your answer. 5” dia. Login to … The commonly used material for shielding or screening magnetism is. Electrode jaws used to hold the electrode in holder must be completely insulated against thermal and electric shocks. A common disinfectant used in village wells for disinfection of water is _____? Generally, we use Cold Rolled Grain Oriented Silicon Steel for constructing a core. Your email address will not be published. Before you purchase a material or fabric for EMF shielding, be sure to check for the conductivity, permeability, thickness, and aperture of the metal, as this goes a long way affecting its shielding efficiency. B. Required fields are marked *. Not Enough Information Provided. Metals like aluminum and galvanized steels are usually used to make EMF shielding materials or fabrics because of their high conductivity. A) 1930s . B. © Copyright 2016-2020 - www.PakMcqs.com/. MEDIUM. C. soft iron Common sheet metals for shielding include copper, brass, nickel, silver, steel, and tin. Uses for RF Shielding. A. C. graphite or cadmium An isolated silicon atom has four electrons in the valence bond.