ESCO ELECTRICAL CERTIFICATION QUESTIONS WITH CORRECT ANSWERS

What is current flow? CORRECT ANSWER D. The flow of electrons in a circuit What is impedance? CORRECT ANSWER A. Opposition to alternating current Like charges will CORRECT ANSWER B. Repel each other Any material that will readily release electrons is called: CORRECT ANSWER B.A conductor The symbol for current is: CORRECT ANSWER B. I Electricity can produce: CORRECT ANSWER D. All the above light heat magnetism The safety ground conductor is usually colored: CORRECT ANSWER B. Green An electron has: CORRECT ANSWER B.A negative charge Which of the following materials would be best suited for use as a semi-conductor? CORRECT ANSWER D.Silicon Which of the following meters must use internal power to check a load or circuit? CORRECT ANSWER 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? CORRECT ANSWER 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? CORRECT ANSWER C. 2880 When testing a capacitor with an analog or digital ohmmeter, the meter should: CORRECT ANSWER 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? CORRECT ANSWER A.60 ohms What is resistance? CORRECT ANSWER A.Opposition to electron flow