asvab electronics study guide
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asvab electronics study guideBut we cannot do it without your support. To study for this portion of the test, study basic electronic information such as how wires function, the function of different electrical currents and conductors, and Ohm’s law. Learn more information about each of these areas below. When studying ASVAB concepts, focus on the basic definitions of electrical words and concepts, including the aforementioned concepts and appliance-specific words, such as voltage and frequency. When studying for the vocabulary portion, focus on the bare bones of concept definitions to recognize what a certain word or phrase means. Negatively charged electrons in a circuit flow from the negative terminal (or anode) to the positive terminal (or cathode). Electrons flow in this manner in response to the attractive and repulsive forces between charged particles. They are composed of smaller particles called protons, electrons, and neutrons. A single proton is the element known as hydrogen. The addition of another proton results in a new element known as helium. If instead there is a different number of neutrons inside of the nucleus (the protons and neutrons in an atom), then it is known as an isotope. These energy orbitals surround the nucleus depending upon the number of electrons and their distance from the atomic nucleus. These electrons farthest from the nucleus are the most reactive. Metals are good conductors because electrons flow easily through them without much resistance. Materials exhibiting very low conductivity are called insulators. Insulators possess high resistivity. Unlike conductors, which experience increased resistance when heated, semiconductors increase in conductivity when heated. It is measured in Coulombs per second, or Amperes. Current, voltage, and resistance are related to each other through Ohm’s Law: Because it is a difference in potential, voltage is only meaningful when considering one point in relation to another. It is measured in Volts.
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It can be likened to a difference in pressure because there is a higher concentration of charge at one point than another. This difference in charge concentration results in a voltage. Resistance and conductance are inversely related; a very conductive material has little resistance, and a very resistance material has little conductance. Resistance is measured in Ohms. Resistance is also linked to the cross-sectional area and length of the material used; the larger the area, the lesser resistance, and the longer the conductor, the greater the resistance. This circuit would of course do nothing but heat the conducting wires. These loads can be connected to the circuit in series, in parallel, or in series-parallel. If any of these connections are broken, the circuit is said to be open and will not function properly. A closed circuit can work; an open circuit cannot. Light bulbs, refrigerators, and computers all act as loads when part of a closed circuit. Loads only dissipate power from a circuit; they do not generate power. The current that runs through a series circuit passes through each component in series. There is only a single path for the current to take through the circuit. In cases where there are different components along these separate paths, the strength of the current will vary. The voltage drop across each branch, however, is the same. The formulas that can be used to calculate the electric power generated or dissipated are. You will 9 minutes to answer 20 questions on the pencil and paper version of the ASVAB test. You’ll also need to know various types of conductors and insulators and how effective they are. And that’s not all, you’ll also need to know different ways electricity can be used, the different types of electrical current and more. Here’s an explanation of a very simple circuit: a battery is connected by a wire conductor to a lamp which is then connected back to the other side of the battery. When the switch is flipped on, the space is closed and the current can flow down to the lamp and light the light bulb. Without resistance regulating the flow, the motors being powered by the electrical current would quickly overheat. A semiconductor by definition is something that conducts electricity poorly at low temperatures. They also can amplify a signal, hence transistor radios. Let’s move on to some other things that are usually covered by questions on this subtest: For example, you should know the meanings of words like voltage, frequency, amperage, amperes, ohms, resistance and more. This law is a basic fundamental of the study of electricity and by having any two elements of the above equation a student can solve for the third. The equation is used in a number of electrical measurements and thus those providing electrical services must have a good understanding of it. One word of caution: when using the Internet be sure to only get information from reputable sources. Needless to say, it’s not going to help you perform better on this subtest if you learn incorrect information. Take our test a few times and you’ll be able to walk into the real ASVAB feeling more confident and relaxed. Study GuideElectrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer ( valence ) electron shell. Their valence shell is less than half full of electrons that are able to move easily from one atom to another. This property makes them useful for the control of electrical current. A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.http://superbia.lgbt/flotaganis/1655421448 One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional. But, resistance isn't the only consideration when choosing a conductor as the most highly conductive elements like silver and gold are also more expensive and more brittle than slightly less conductive elements like copper. A balance needs to be struck between the electrical qualities of a material and its cost and durability. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy. The components of a microwave, for example, are loads that work together to convert household electricity into radation that can be used to quickly cook food. It consists of a source of voltage, a load, and connective conductors. If the circuit is interrupted, if a wire is disconnected or cut for example, it becomes an open circuit and no electricity will flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present. Most circuits contain a mix of series and parallel segments. A good example is a household circuit breaker. Electrical outlets in each section of the house are wired in parallel with the circuit breaker for that section wired in series making it easy to cut off electricity to the parallel parts of the circuit when needed. Connecting batteries in series combines their voltage while keeping their current the same, connecting batteries in parallel combines their current while keeping their voltage the same, and using a series-parallel configuration, half the batteries can be connected in series and half in parallel to combine both voltage and current. A common source of direct current (DC) is a battery. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves ( half-wave rectification ) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification. It is made entirely from semiconductor material (making it a solid state device ) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor. The junction of these two wires produces a voltage based on the temperature difference between them. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil. This test consists of 16 questions which must be completed within 8 minutes. This section of the ASVAB is designed to test your knowledge of electronics, electricity, electrical components, circuits, and electric formulas. Start your test prep right now with our Electronics Information ASVAB questions. If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled. You scored SCORE out of TOTAL. Your performance has been rated as RATING The letter P represents power, which is measured in watts. The letter I represents current, which is measured in amperes. The letter V represents voltage which is measured in volts. Question 2 What is the load in this basic circuit model? In a basic circuit model, there is a voltage source (pictured here as a battery at points A and B), a load, and conductors. The conductors are drawn using the lines and arrows. The load in this model is the light bulb pictured at point C. Examples of loads are light bulbs, resistors and motors. Question 3 Three amps equals how many milliamps? A milliamp is one thousandth of an amp. So every amp equals 1,000 milliamps:A series-parallel circuit has some loads wired in series and some loads wired in parallel. The loads in this circuit are R1, R2, and R3. R1 is wired in series while R2 and R3 are wired in parallel. Question 5 What device would you use to measure electrical resistance in a circuit. Electrical resistance is measured in ohms, and can be measured with an ohmmeter. Question 6 Which of the following is NOT a type of resistor? A potentiometer is a three terminal resistor with a sliding contact. A rheostat is a two terminal variable resistor. A variable resistor is any resistor that allows you to change the amount of resistance. Potentiometers and rheostats are both types of variable resistors. Question 7 Which of these electrical devices can be used to store an electric charge? The insulator is called the dielectric. An electric charge builds up when a voltage is applied across the plates, which creates an electric field. Question 8 A transducer is any device used to convert energy from one form to another. Piezo transducers are often used in microphones where they convert sound pressure to electrical voltage. Question 9 The amount of energy used by a consumer in their home or business is typically measured in A kilowatt-hour (kWh) is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour Question 10 AM radio stations broadcast in which frequency range. Frequencies are measured in kilohertz, megahertz, or gigahertz. Question 11 If a circuit has 8 volts of power and 4 ohms of resistance, what will the current equal. Current is measured in amps.B A system of transporting current from one part of a component to another. C A device that is capable of changing some form of energy (such as chemical energy) into electricity. D An electrical device that can convert electric power into radio waves, and vice versa Question 12 Explanation: The correct answer is (C). An electrical cell supplies electrical current. Examples include batteries and solar cells. Question 13 What is the voltage in a circuit with 10 amps of current and 6 ohms of resistance? The band code for a resistor is as follows: Pushing the button breaks the circuit. When you release the button it returns to its normally closed (on) position. Question 16 Which of the following is the SI unit representing one cycle per second? The hertz, or Hz, is the SI unit of cycles per second and is a measurement of frequency. The Ohm is a measurement of resistance and the Ampere is a measurement of flow rate of electric charge. Any items you have not completed will be marked incorrect. If you leave this page, your progress will be lost. Keep Trying! Not Bad! Good Work! Perfect. There are three modes to choose from to study: learn, flashcards, scatter. You can change your study mode by selecting the drop down box below the flash card. The ASVAB test helps the military determine your qualifications for enlistment. The ASVAB first appeared in 1968. By 1976 it was required by all branches of the military. The test was completely redone in 2002. To evaluate your aptitudes in these areas, you are given a series of questions in ten different categories, as shown below: Identify word synonyms. At the MEPS locations the ASVAB test will be given via a computer. A paper and pencil version of the test is administered at the MET sites. Your AFQT scores represent a percentile between 1 and 99 and measure your ranking compared to scores from other 18 to 23 year olds. If you score a 70 on your AFQT, this implies that you scored better than 70 of test takers. Your scores on the other six ASVAB tests will help identify which jobs may be appropriate for you in the military. It looks like your browser needs updating. For the best experience on Quizlet, please update your browser. Learn More. No Are electrons smaller or larger than protons and neutrons. Smaller Insulators Materials exhibiting low conductivity -- high resistivity Why are metals good conductors. Open circuit Connections in circuit are broken DOES NOT WORK. DC Alternators produce. AC Grounding Method of neutralizing a charged object by connecting it to a much larger source of charge (most commonly the Earth) Resistors Passive circuit components used to reduce current flow and voltage levels in a circuit - Useful for modifying circuits to produce a desired amount of current Where can resistors be used. Circuit in series, in parallel, and in series-parallel Fuses and Circuit Breakers Safety features that preserve the integrity of a circuit in the case of a power overload When is a circuit shorted. Part 6 covers Electronics Information. You will have 8 minutes to answer 16 questions. When you are ready, click the “Start Test” button below. Our site only allows each person to take each test only one time. For the uninitiated, what that means is that the Electronics Information portion of the ASVAB does not count towards your qualifying for the military, it will only be used as a potential determinant for placement in certain types of jobs. All of the questions in this practice test will be multiple choice with four potential answers, with only one of those being correct. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Asvab Study Guide Electronics. To get started finding Asvab Study Guide Electronics, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Electronics Study Guide. To get started finding Electronics Study Guide, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. However, this property is also important in a direct current circuit as seen here. An open circuit has no current, but the moment the switch is closed, current will begin to flow. The inductor, resisting the sudden change in voltage, will resist current flow at first. The lamp, since it is parallel to the resisting inductor, will light up immediately without difficulty. However, the inductor will soon “get used” to the current flow, and the resistance of its path will drop significantly. As more current flows through the easy inductor path, the total current (and therefore energy use) of the circuit will increase significantly as the overall resistance drops. (D) is exactly the opposite of what will happen. Something similar to (B) could happen only if the voltage source were limited in the amount of current it could provide and the small fraction of current passing through the lamp were not enough to light the lamp once the inductor dropped its resistance, or if the total current draw caused a fuse or breaker to cut off the current. However, in neither of these cases would the lamp itself “burn out.” Loads in series, on the other hand, affect the overall resistance of the circuit and therefore the total power draw on the battery. Recall that capacitors and inductors can either let current flow freely or act as resistors, depending on the type of current. In an AC circuit, a capacitor lets current flow freely while an inductor resists current flow. An inductor placed in series with the lamp will therefore act as a resistor over which a voltage drop occurs, and the lamp will be correspondingly dimmer than if the voltage drop of the circuit occurred entirely over the lamp itself. What is its resistance? Black is zero, then orange (in either of the first two positions) is three, and then orange (in the final position) is three zeroes. A zero at the beginning of the number has no effect, as 03000 is just written as 3,000. Answer choice (C) would have been correct if the pattern were orange, black, and then orange. Check out Kaplan’s ASVAB Prep Plus. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Electronics Information Study Guide. To get started finding Electronics Information Study Guide, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Electronics Study Guide. To get started finding Electronics Study Guide, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Asvab Electronics Study Guide. To get started finding Asvab Electronics Study Guide, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Asvab Electrical Study Guide. To get started finding Asvab Electrical Study Guide, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. Please try again.Please try again.Please try again. In this book you'll find 250 practice test questions for the ASVAB Electronics Information subtest. Each question has been created from a custom template that randomizes the question content, answers and answer order to give you a unique question every time. What's more, each question comes with a complete solution so you can learn the material while you're taking the practice test. Wondering if this is the right ASVAB study aid for you. Download a sample or head over to ASVAB Test Bank ( ) to give the questions a try before you buy. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Register a free business account To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.