ETA Certification Test 73 Questions with Verified Answers,100% CORRECT

ETA Certification Test 73 Questions with Verified Answers Which symbol is used for ohms of resistance? - CORRECT ANSWER Ω A unit of energy is the: - CORRECT ANSWER Joule Minute particles that make up all possible elements and still retain the unique chemical characteristics of the element are called: - CORRECT ANSWER atoms A component whose value is measured in microfarads is a: - CORRECT ANSWER capacitor Kirchoff's Voltage Law (KVL) states that the total voltage around a closed loop must be zero. - CORRECT ANSWER True The pole of the magnet from which the flux leaves is called the _______ pole. - CORRECT ANSWER north Safety precautions to be taken when working on high voltage equipment include which of the following? - CORRECT ANSWER All jewelry should be removed Which metric prefix would be used to represent 1 x 10⁻³ - CORRECT ANSWER Milli An electron has: - CORRECT ANSWER a negative charge Total power in a series circuit equals the: - CORRECT ANSWER sum of the power dissipated by each resistor Invisible lines of force that surround a magnet are called: - CORRECT ANSWER magnetic flux lines The basic unit of electric power is the: - CORRECT ANSWER watt With three 4.5 kΩ resistors and one 1.5 kΩ resistor in parallel, the total resistance is: - CORRECT ANSWER 750 Ω The basic unit of length in the metric system is the: - CORRECT ANSWER meter What two types of energy are used throughout electronics? - CORRECT ANSWER Kinetic and potential Electrical direct current flowing in a wire produces a magnetic field: - CORRECT ANSWER parallel to the wire Battery cells are connected in parallel to: - CORRECT ANSWER increase current capacity Which class of fire extinguisher is used on oil fires? - CORRECT ANSWER Class B When the resistance of a series circuit decreases, ____________. - CORRECT ANSWER total current increases A material is magnetized when the: - CORRECT ANSWER domains are in alignment If a series circuit has two 13 kΩ resistors with a source voltage of 10 V, the wattage is: - CORRECT ANSWER 3.85 mW What does the M+ key on a calculator do? - CORRECT ANSWER sums the quantity on screen to memory The total current in a series-parallel circuit equals the: - CORRECT ANSWER sum of the parallel branch circuit current The ammeter setting on a multimeter indicates what type of reading? - CORRECT ANSWER Current In a series circuit, the current is _________. - CORRECT ANSWER the same in all parts of the circuit _______ force produces magnetic flux. - CORRECT ANSWER Magnetomotive Calculate the current in the circuit below: A component whose value is measured in Ohms is a: - CORRECT ANSWER resistor You should use caution when talking to someone who is operating electrical equipment because the distraction: - CORRECT ANSWER could damage the equipment could ruin an electronic device both could be injured all of the above A material that can be magnetized easily falls into this category: - CORRECT ANSWER Ferromagnetic It is dangerous to use wooden handle tools around high voltage due to their ability to absorb moisture. - CORRECT ANSWER True Which metric prefix would be represented by 1 x 10¹²? - CORRECT ANSWER Tera The output of a lead-acid cell is approximately: - CORRECT ANSWER 2.1 V If a short occurs in the parallel portion of a series-parallel circuit, how will the total resistance be affected? - CORRECT ANSWER It will increase ______ is a term used to describe voltage. - CORRECT ANSWER Electromotive force In a parallel circuit, total resistance: - CORRECT ANSWER is less than the resistance of any branch In a linear electrical circuit, voltage and current are: - CORRECT ANSWER inversely proportional A molecule is the smallest particle of matter than exist by itself. - CORRECT ANSWER False When an individual receives an electrical shock, an immediate symptom can be: - CORRECT ANSWER cardiac arrest Watt's Law states that power is the product of current and voltage. Using algebra, how could the power be determined if resistance and current are known? - CORRECT ANSWER current squared times the resistance Which of the following is commonly used to measure electrical energy consumption? - CORRECT ANSWER Kilowatt-hours What happens as protective eye goggles age? - CORRECT ANSWER Their resistance to scratching decreases The Wheatstone bridge can be used for precision measurement of: - CORRECT ANSWER resistance A term used to describe opposition to current flow is: - CORRECT ANSWER resistance The main purpose of a safety observer is to: - CORRECT ANSWER turn off equipment in use and apply emergency first aid or cardiopulmonary resuscitation if needed With 70 volts applied to two 30 kΩ resistors in series connected to three 30 kΩ resistors in parallel forming a series-parallel circuit, what is the total current? - CORRECT ANSWER 1 mA In an electrical circuit where voltage and resistance are known, which form of Ohms Law is used to find the circuit current? - CORRECT ANSWER I=E/R Ohms Law states that voltage is the product of resistance and current. Using algebra, how would you determine the resistance? - CORRECT ANSWER divide the voltage by the current If a series circuit has a current of about 15.4mA and a source voltage of 20V, the total resistance is approximately: - CORRECT ANSWER 1300Ω A/an _____ stops the flow of current. - CORRECT ANSWER insulator A decrease in the current of a series circuit can be caused by a: - CORRECT ANSWER resistance increase Fuses are rated in maximum ____ and ____. - CORRECT ANSWER current, voltage Which device would most likely include a light level meter? - CORRECT ANSWER camera Battery cells are connected in series to: - CORRECT ANSWER increase voltage output The most common functions of a generic multimeter are: - CORRECT ANSWER voltmeter, ammeter, ohmmeter Switches are rated in maximum ____ and ___. - CORRECT ANSWER current, voltage Digital multimeters eliminate which of the following disadvantages of analog meters? - CORRECT ANSWER Parallax errors Given a battery rated at 200 ampere-hours, how many hours will the battery be able to provide 10 amperes? - CORRECT ANSWER 20 Which prefix would be used to represent 1 x 10⁶? - CORRECT ANSWER Mega A resistor with 68 +/- color bands of blue, gray, and black has a value of ________. - CORRECT ANSWER 68 ohms at 20 percent When two 10 kΩ parallel resistors are connected in series with a third 10 kΩ resistor, total resistance (RT) is: - CORRECT ANSWER 15 kΩ The current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to circuit resistance. This is a statement of: - CORRECT ANSWER Ohm's Law A/an _____ allows current to flow easily - CORRECT ANSWER conductor The unit of measure for electron flow is a(n) _____. - CORRECT ANSWER ampere The sum of voltage drops in a series circuit: - CORRECT ANSWER equals the applied voltage The "triboelectric effect" causes what kind of electricity? - CORRECT ANSWER Static Kirchoff's First Law is also known as the principle of conservation of electric charge. It states that at any point, the sum of currents flowing toward that point is equal to the sum of currents flowing away from that point. - CORRECT ANSWER True In a simple parallel circuit, the voltage across each branch is ____. - CORRECT ANSWER equal to the source voltage Thevenin's Theorem states that it is possible to simplify any circuit containing any amount of voltage sources, current sources, or resistance, no matter how complex, to an equivalent circuit with just a single voltage source and series resistance connected to a load. - CORRECT ANSWER True The Law of Static Electrical Charges states: - CORRECT ANSWER like charges repel In order to eliminate possible fire hazards, rags should be stored in: - CORRECT ANSWER metal containers A basic atom must contain what two types of subatomic particles? - CORRECT ANSWER electron and proton When resistors are added in parallel to a parallel circuit, total current: - CORRECT ANSWER increases