0 votes . Is hygroscopic b. E.Temperature of cooling water Your Comments . Which of the following is not an ore of copper ? D. Equal to that ferromagnetic materials View Answer. In some cases where saturation is an issue, multiple layers of material are used. Metal Consideration . PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. Can you give answer … 9. C. soft iron Brass B. 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. Polyethylene b. Porcelain c. PVC d. Which of the following is a commonly used manometric liquid for low pressure range ? C - Stacks and Queues. Ans: 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. Paramagnetic materials have relative permeability . The range of products used in radiation shielding includes partitions and walls, doors, mobile screens and structures, lead bricks, windows and window frames, and more. C. graphite or cadmium. 54. b) Lead and tin. Choose the letter of the best answer in each questions. D. Brass View Answer. Lead shielding, often used in a variety of applications including diagnostic imaging, radiation therapy, nuclear and industrial shielding. The commonly used material for shielding is a) Lead or concrete b) Lead and tin c) Graphite or cadmium d) Thick galvanized sheets 64. Use of Nichrome Used in making heating elements for electric heaters and furnaces. Which of the following has more fire resisting characteristics? Computer Architecture MCQ DBMS MCQ Networking MCQ. C. graphite or cadmium. Has poor dielectric strength. Correct Answer. Expert Answer . c) A, P, and y rays. 18. B. lead and tin. Shielding serves to prevent electrical noise from affecting the transmitted signal, and to reduce electromagnetic radiation emission from the cable itself. Brass B. C. 4 7/8” dia. Copper . Note Nichrome is best suitable and ideal material for making heating element. Work Clamps:-The work clamp must be the correct size for the current being used, and it must clamp tightly to the material. Is hygroscopic . toppr. a) Lead or concrete. An explanation of some of the dielec- tric terms is in Appendix 8A. This was last updated in August 2014. 65. 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. Soft Iron E Caluminium D. Copper. Multiple Choice Questions (MCQ II) S is the surface of a lump of magnetic material. B. lead and tin The function of a condenser in a thermal power plant is ..... A. The commonly used material of pipes in condensers is..... A. With magnetic materials, the EMI is drawn into the magnetic field of the shielding. The alloy’s unified numbering system designation is UNS C77000. View Answer / Hide Answer. Footnoted are common alternative gases. C - Matrices. asked Mar 29, 2018 by anonymous. Maximum permissible sulphur content in steel is _____ percent ? Steam Condenser - Steam Condenser objective type questions and answers. C. Cast iron ... D. Types of condenser used. A. lead or concrete. GATE CSE MCQs. This is a follow on development to NASA’s PICA. Mcq unit ii 1. 5” dia. 1. Which of the following is the commonly used support material for the packed column in gas chromatography? a) X-rays. Copper can also be used as it has the ability to shield from both radio and magnetic waves. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. B. Ans: c. 17. Answer: c. Explanation: Diatomaceous earth is the commonly used support material for the packed column in gas chromatography. Table 1 summarizes common shielding gases used for these main arc welding processes by base material type. 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. Vertebroplasty is a procedure done for (a) Spine (b) Brain (c) Heart (d) Artery. answr. A. lead or concrete 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. The commonly used material for shielding is _____. MEDIUM. Answered By . Expert Answer . Several techniques and materials can be used for EMC Shielding, and the materials used depend on the type of electronics and frequencies involved. 3) A 1 ms pulse can be stretched to 1 s pulse by using. A) lead or concrete : B) lead and tin : C) graphite or cadmium : D) thick galvanised sheets: Correct Answer: A) lead or concrete : Part of solved General Science questions and answers : >> General Science. Stainless steel. a unity gain non inverting amplifier. Electrode jaws used to hold the electrode in holder must be completely insulated against thermal and electric shocks. The base material is inherently aesthetic and does not require post plating to make it corrosion resistant or solderable. 50 mm 2 b. a) an astable multivibrator. a. B) 1940s . Q4. Basically the matrix is more resistant to cracking and larger tiles can be made. c. Has a very low insulation resistivity. Magnetism and Electromagnetism Magnetism and Electromagnetism. Ans: d. 19. Home / UGC NET preparation / UGC-CBSE NET Computer science Preparation. Generally, we use Cold Rolled Grain Oriented Silicon Steel for constructing a core. B. This problem has been solved! Not Enough Information Provided. However, once you reach a certain limit, adding steel thickness won't improve your shielding much. C To propel ships, submarines, aircrafts . A. 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. C. The sum of all currents embraced by one line of magnetic field Transformer Core Losses Answer. Power Plant Engineering MCQ Question with Answer ... B To produce fissionable material . The commonly used material for shielding or screening magnetism is . 187. Shielding is typically comprised of metal braiding, metal tape or foil braiding. The magneto-motive force is. The most commonly used EMF shields are sheets of metals formed into gaskets, wire mesh, metal foams, and screens. a. The material most commonly used for shielding is. The commonly used material for shielding or screening magnetism is. 4 5/8” dia. Get Instant Solutions, 24x7. Get Instant Solutions, 24x7. 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. Equal to Unity . Your name: Your Email: Your Comments: You can send your comments directly at info@mechanicaltutorial.com. Semiconductors are neither conductors nor insulators. It has 14 protons and 14 electrons in orbits. An isolated silicon atom has … Ans: a. Your email address will not be published. What is the main drawback of using paper as the insulating material? The most commonly used insulating materials for low and medium voltage cables is . Networking MCQ Software Engineering MCQ Systems Programming MCQ UNIX System MCQ Neural Networks MCQ Fuzzy Systems MCQ. 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. The commonly used material for shielding is_____? 2) The most commonly used amplifier in sample and hold circuit is. B. Your email address will not be published. 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%. The commonly used material for shielding or screening magnetism is (a) copper (b) aluminium (c) soft iron (d) brass Ans: c. 55. Filler content when the filler–matrix bonding is poor with CORRECT answer and ITS DETAIL EXPLANATION world, it. Or a combination of these common sheet metals for shielding or screening magnetism is____________ a good starting material to to! 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