ESCO Electrical Test Exam 2024 with 100% Solved Solutions

hat is current flow? - D.The flow of electrons in a circuit What is impedance? - A.Opposition to alternating current Like charges will - B. Repel each other Any material that will readily release electrons is called: - B.A conductor The symbol for current is: - B. I Electricity can produce: - D. All the above light heat magnetism The safety ground conductor is usually colored: - B.Green An electron has: - B.A negative charge Which of the following materials would be best suited for use as a semi-conductor? - D.Silicon Which of the following meters must use internal power to check a load or circuit? - A.Ohmmeter What would be the result if a 24 volt, 20 ohm contactor coil was wired in series with a 24 volt, 200 ohm control relay? - B.Only the control relay would operate Three defrost heaters, each 15 ohms, are wired in parallel to a 120 volt power supply. How many Watts are consumed? - C. 2880 When testing a capacitor with an analog or digital ohmmeter, the meter should: - B.Measure low resistance then return to a high reading How much resistance must be placed in a 120 volt circuit to limit the current to 2 amps? - A.60 ohms What is resistance? - A.Opposition to electron flow In electrical wiring, a black colored wire indicates: - A. A hot conductor How many watts are used by a heater operating on 460 volts and drawing 5 amps? - D .2300 How are fuses sized? - D .Both A and B What is generally considered the maximum allowable supply voltage variation - A.5% Capacitors are rated in: - D .Both B and C What is the term used to describe the output side of a transformer? - D .Secondary side One horsepower is equal to ______ watts. - B. 746 A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total resistance? - A.6 ohms In a series circuit, the voltage drop across each load will: - D .Add up to equal the source voltage Which of the following is equal to 2.1kW? - c .2100 watts A capacitor analyzer is designed to check: - D .The capacitance of the a capacitor On an electronic oil safety switch, what changes the pressure signal to an electrical signal? - A.Transducer A three phase load requires a minimum of - A.Three supply lines An electronically commutated motor (ECM) is designed to: - D .Provide proper airflow under various conditions Resistance can be calculated by: - A.E divided by I The total resistance in a parallel circuit will be: - D .Less than the smallest resistance Which of the following statements about current is true? - B.Current flow will increase when voltage increases When resistors are wired parallel: - B.The voltage drop across each resistor will be the same as the applied source voltage Which of the following is equal to 100 milliamps? - C. 0.10 amps The meter on a house measures the ____ passing through it. - C. Watts