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ETA certification test (2025)Actual
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Which symbol is used for ohms of resistance? - Answer-Ω A unit of energy is the: - Answer-Joule Minute particles that make up all possible elements and still retain the unique chemical characteristics of the element are called: - Answer-atoms A component whose value is measured in microfarads is a: - Answer-capacitor Kirchoff's Voltage Law (KVL) states that the total voltage around a closed loop must be zero. - Answer-True The pole of the magnet from which the flux leaves is called the _______ pole. - Answer-north Safety precautions to be taken when working on high voltage equipment include which of the following? - Answer-All jewelry should be removed Which metric prefix would be used to represent 1 x 10⁻³ - Answer-Milli An electron has: - Answer-a negative charge
Total power in a series circuit equals the: - Answer-sum of the power dissipated by each resistor Invisible lines of force that surround a magnet are called: - Answer-magnetic flux lines The basic unit of electric power is the: - Answer-watt With three 4.5 kΩ resistors and one 1.5 kΩ resistor in parallel, the total resistance is:
- Answer-750 Ω The basic unit of length in the metric system is the: - Answer-meter What two types of energy are used throughout electronics? - Answer-Kinetic and potential Electrical direct current flowing in a wire produces a magnetic field: - Answer- parallel to the wire Battery cells are connected in parallel to: - Answer-increase current capacity Which class of fire extinguisher is used on oil fires? - Answer-Class B When the resistance of a series circuit decreases, ____________. - Answer-total current increases A material is magnetized when the: - Answer-domains are in alignment
all of the above A material that can be magnetized easily falls into this category: - Answer- Ferromagnetic It is dangerous to use wooden handle tools around high voltage due to their ability to absorb moisture. - Answer-True Which metric prefix would be represented by 1 x 10¹²? - Answer-Tera The output of a lead-acid cell is approximately: - Answer-2.1 V If a short occurs in the parallel portion of a series-parallel circuit, how will the total resistance be affected? - Answer-It will increase ______ is a term used to describe voltage. - Answer-Electromotive force In a parallel circuit, total resistance: - Answer-is less than the resistance of any branch In a linear electrical circuit, voltage and current are: - Answer-inversely proportional A molecule is the smallest particle of matter than exist by itself. - Answer-False When an individual receives an electrical shock, an immediate symptom can be: - 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? - Answer- current squared times the resistance Which of the following is commonly used to measure electrical energy consumption? - Answer-Kilowatt-hours What happens as protective eye goggles age? - Answer-Their resistance to scratching decreases The Wheatstone bridge can be used for precision measurement of: - Answer- resistance A term used to describe opposition to current flow is: - Answer-resistance The main purpose of a safety observer is to: - 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? - 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? - Answer-I=E/R Ohms Law states that voltage is the product of resistance and current. Using algebra, how would you determine the resistance? - 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: - Answer-1300Ω
When two 10 kΩ parallel resistors are connected in series with a third 10 kΩ resistor, total resistance (RT) is: - 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: - Answer-Ohm's Law A/an _____ allows current to flow easily - Answer-conductor The unit of measure for electron flow is a(n) _____. - Answer-ampere The sum of voltage drops in a series circuit: - Answer-equals the applied voltage The "triboelectric effect" causes what kind of electricity? - 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. - Answer-True In a simple parallel circuit, the voltage across each branch is ____. - 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. - Answer-True The Law of Static Electrical Charges states: - Answer-like charges repel
In order to eliminate possible fire hazards, rags should be stored in: - Answer-metal containers A basic atom must contain what two types of subatomic particles? - Answer-electron and proton When resistors are added in parallel to a parallel circuit, total current: - Answer- increases
