Chicago 303 Supervising Electrician Practice Exam (Chicago Electrical Code 2018 Edition)
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⦁ If a sign permit has been denied, what option does the contractor have, who has the final say?
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(AHJ) Building Commissioner
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Inspector
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General Contractor
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Supervising Electrician
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Please choose the "best" choice for each question.
You'll have 4-hours to complete the 150 question exam.
Covers the following section :
Principles and Practices of Electricity
Chicago Administration Chapters 2,4, and 13
OSHA Safety Practices
2018 Chicago Electrical Code (NEC 2017)
Good Luck!
Quiz Preview
- 2.
⦁ Who may grant special permission on code?
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The owner
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Supervising Electrician
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Inspector
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AHJ (Building Commissioner)
Correct Answer
A. AHJ (Building Commissioner)Explanation
The AHJ (Building Commissioner) may grant special permission on code. The AHJ, or Authority Having Jurisdiction, is responsible for enforcing building codes and regulations. They have the authority to approve exceptions or modifications to the code if it is deemed necessary or appropriate. The Supervising Electrician, owner, and inspector may have input or recommendations, but the final decision lies with the AHJ.Rate this question:
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- 3.
⦁ Conductive Optical Fiber Cable?
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One who is under the direct supervision of a supervising electrician.
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Supervising Electrician
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Factory assembly of one or more fibers having an overall covering and containing noncurrent carrying conductive members such a strength members metallic barriers metallic armor or metallic sheath.
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A person registered pursuant to Chapter 4-292
Correct Answer
A. Factory assembly of one or more fibers having an overall covering and containing noncurrent carrying conductive members such a strength members metallic barriers metallic armor or metallic sheath.Explanation
The correct answer is "Factory assembly of one or more fibers having an overall covering and containing noncurrent carrying conductive members such a strength members metallic barriers metallic armor or metallic sheath." This answer accurately describes a conductive optical fiber cable as a cable that is assembled in a factory and contains fibers with a covering, as well as noncurrent carrying conductive elements such as metallic barriers, armor, or sheath.Rate this question:
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- 4.
⦁ Abandoned Electrical Equipment shall be?
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Saved and reused for later.
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Cut & capped only.
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Turned over to the owner.
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All accessible raceways, cables, conductors, boxes and equipment shall be removed.
Correct Answer
A. All accessible raceways, cables, conductors, boxes and equipment shall be removed.Explanation
All accessible raceways, cables, conductors, boxes, and equipment should be removed when dealing with abandoned electrical equipment. This ensures that no live wires or potential hazards are left behind, promoting safety and preventing any accidents or damage that may occur if the equipment is left in place. Removing all the components also allows for a clean and organized workspace for future electrical work.Rate this question:
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- 5.
⦁ Allowable ampacity for a #14?
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15A
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30A
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12A
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20A
Correct Answer
A. 15AExplanation
The allowable ampacity for a #14 wire is 15A. This means that the wire can safely carry a maximum current of 15A without overheating or causing damage. Ampacity is determined based on the wire size and its ability to handle the heat generated by the current flowing through it. In this case, a #14 wire has a lower ampacity compared to larger wire sizes such as #12 or #10, which can handle higher currents.Rate this question:
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- 6.
⦁ What is Insulator?
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Unit quantity of electricity
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Is the name given to a material through which it is very difficult to produce an electric current.
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Unit of Current
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Unit of Amperes
Correct Answer
A. Is the name given to a material through which it is very difficult to produce an electric current.Explanation
An insulator is a material that does not easily allow the flow of electric current. It is difficult for electric charges to move through an insulator because the material has high resistance. Insulators are used to prevent the loss of electrical energy and to protect against electric shock.Rate this question:
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- 7.
⦁ Separation of emergency circuits from normal are required?
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True
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False
Correct Answer
A. TrueExplanation
The separation of emergency circuits from normal circuits is required to ensure that emergency systems, such as fire alarms, emergency lighting, and emergency power supplies, remain functional even if there is a fault or failure in the normal circuits. This separation helps to prevent any potential disruptions or failures in emergency systems, ensuring the safety and well-being of individuals in emergency situations.Rate this question:
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- 8.
⦁ Direct Current
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Always flows in the same direction
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Flows in opposite directions
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All of the above
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None of the above
Correct Answer
A. Always flows in the same directionExplanation
Direct current always flows in the same direction. This means that the flow of electric charge is constant and does not change its direction over time. Unlike alternating current, which periodically changes direction, direct current maintains a consistent flow in one direction. Therefore, the correct answer is "Always flows in the same direction".Rate this question:
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- 9.
⦁ All receptacles within 20' of a pool shall be
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Arc type
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Tamperproof type
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GFCI type
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None of the above
Correct Answer
A. GFCI typeExplanation
All receptacles within 20' of a pool shall be GFCI type. This is because GFCI (Ground Fault Circuit Interrupter) receptacles are specifically designed to protect against electrical shock in wet environments, such as near a pool. They have a built-in sensor that quickly detects any imbalance in the electrical current, such as when someone accidentally comes into contact with water and electricity at the same time. When a fault is detected, the GFCI quickly shuts off the power, preventing potential electrocution. Therefore, it is important to have GFCI type receptacles near pools to ensure the safety of individuals using the pool.Rate this question:
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- 10.
⦁ Magnets are described as having any body which has the ability to attract iron or steel.
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True
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False
Correct Answer
A. TrueExplanation
Magnets are objects that possess the property of attracting iron or steel. This property is known as magnetism. When a magnet comes in contact with iron or steel, it exerts a force that pulls them towards itself. This phenomenon is widely observed and studied in science. Therefore, it is correct to say that magnets have the ability to attract iron or steel, making the answer "True."Rate this question:
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- 11.
⦁ If the GC pulls the permit, who signs the electrical permit?
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GC pulls a building permit and EC submits the electrical permit under the building permit.
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EC pulls a building permit.
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Mechanical pulls a building permit and EC submits the electrical permit under the building permit.
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Plumbing pulls a building permit and EC submits the electrical permit under the building permit.
Correct Answer
A. GC pulls a building permit and EC submits the electrical permit under the building permit.Explanation
In this scenario, the General Contractor (GC) is responsible for pulling the building permit. Once the building permit is obtained, the Electrical Contractor (EC) submits the electrical permit under the building permit. This means that the EC does not pull the building permit themselves, but rather submits the electrical permit as part of the overall building permit obtained by the GC.Rate this question:
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- 12.
⦁ Supervising Electrician?
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One who is under the direct supervision of a supervising electrician.
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General Contractor
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Inspector
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A person registered pursuant to Chapter 4-292
Correct Answer
A. A person registered pursuant to Chapter 4-292Explanation
The correct answer is "A person registered pursuant to Chapter 4-292." This means that a supervising electrician is someone who has registered and meets the requirements set forth in Chapter 4-292. This could include having the necessary qualifications, certifications, and experience to supervise electrical work.Rate this question:
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- 13.
⦁ Allowable ampacity for a #12?
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15A
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30A
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12A
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20A
Correct Answer
A. 20AExplanation
The allowable ampacity for a #12 wire is 20A. This means that the wire can safely carry a maximum current of 20 amps without overheating or causing any damage. The ampacity of a wire is determined by factors such as the wire gauge, insulation type, and the ambient temperature. In this case, the #12 wire has a sufficient size and capacity to handle a maximum current of 20 amps.Rate this question:
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- 14.
⦁ What are Harmonics?
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Voltages and currents which appear on the electrical systems at frequencies that are integral multiples on the electrical system.
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Same as above with no frequencies.
Correct Answer
A. Voltages and currents which appear on the electrical systems at frequencies that are integral multiples on the electrical system.Explanation
Harmonics refer to voltages and currents that occur in electrical systems at frequencies that are integral multiples of the fundamental frequency of the system. These harmonics can cause distortion in the waveform and can lead to issues such as overheating, equipment malfunction, and power quality problems. It is important to monitor and control harmonics in electrical systems to ensure efficient and reliable operation.Rate this question:
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- 15.
⦁ What is used to measure resistance directly?
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Amp Meter
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Multi Meter
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Volt Meter
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Ohmeter
Correct Answer
A. OhmeterExplanation
An ohmmeter is used to measure resistance directly. It is a device that applies a known voltage to a circuit and measures the resulting current. By using Ohm's law (V = IR), the ohmmeter can calculate the resistance of the circuit. Unlike an ammeter, which measures current, or a voltmeter, which measures voltage, an ohmmeter is specifically designed to measure resistance. A multimeter is a versatile device that can measure resistance, current, and voltage, but an ohmmeter is specifically designed for measuring resistance.Rate this question:
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- 16.
⦁ Alternating Current tends to move in one direction?
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True
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False
Correct Answer
A. FalseExplanation
Alternating Current (AC) does not move in one direction. It constantly changes direction, oscillating back and forth. This is different from Direct Current (DC), which flows in one direction only. AC is commonly used in electrical power transmission and distribution systems due to its ability to be easily transformed to different voltage levels and its efficiency in long-distance transmission.Rate this question:
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- 17.
⦁ What is used to measure resistance directly?
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Amp Meter
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Multi Meter
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Volt Meter
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Ohmeter
Correct Answer
A. OhmeterExplanation
An ohmmeter is used to measure resistance directly. Unlike other meters mentioned, an ohmmeter is specifically designed to measure the resistance of a circuit component. It applies a known voltage to the component and measures the resulting current, allowing for an accurate measurement of resistance. Amp meters measure current, volt meters measure voltage, and multi meters can measure various electrical quantities including resistance, but an ohmmeter is the most direct and accurate tool for measuring resistance.Rate this question:
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- 18.
⦁ Power factor Is the ratio of the true power or watts to the apparent power or voltamperes.
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True
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False
Correct Answer
A. TrueExplanation
The power factor is indeed the ratio of the true power or watts to the apparent power or voltamperes. This means that it represents the efficiency of an electrical system in converting electrical power into useful work. A power factor of 1 indicates a system with maximum efficiency, while a power factor less than 1 indicates a system with inefficiencies such as reactive power. Therefore, the statement "True" accurately reflects the definition of power factor.Rate this question:
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- 19.
⦁ Max spacing of receptacles along a wall?
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4'
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5'
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6'
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10'
Correct Answer
A. 6'Explanation
The correct answer is 6'. This refers to the maximum spacing of receptacles along a wall. According to electrical code regulations, receptacles should be placed no more than 6 feet apart along a wall to ensure convenient access to electrical outlets throughout a room. This spacing allows for easy use of electrical appliances and reduces the need for long extension cords.Rate this question:
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- 20.
⦁ A Farad is a unit of capacitance.
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True
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False
Correct Answer
A. TrueExplanation
A Farad is indeed a unit of capacitance. Capacitance is a measure of an object's ability to store an electric charge. The Farad is the SI unit of capacitance and is defined as one coulomb per volt. It represents a large amount of capacitance, as most capacitors used in everyday electronics have capacitance values in the microfarad (μF) or picofarad (pF) range. Therefore, the statement "A Farad is a unit of capacitance" is true.Rate this question:
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- 21.
⦁ What is a Ohm?
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Unit of Power
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Unit of Electrical resistance
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Unit of Ampere
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Inductance
Correct Answer
A. Unit of Electrical resistanceExplanation
An Ohm is the unit of electrical resistance. It is used to measure how much a material or device resists the flow of electric current. The higher the resistance, the more difficult it is for the current to pass through. This unit is named after the German physicist Georg Simon Ohm, who discovered Ohm's law, which states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor.Rate this question:
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- 22.
⦁ 4-Wire delta connected system of one phase is winding is grounded
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The high leg shall be Brown.
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The high leg shall be Black.
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The high leg shall be Yellow.
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The high leg shall be Orange.
Correct Answer
A. The high leg shall be Orange.Explanation
In a 4-wire delta connected system, one phase winding is grounded. The high leg refers to the phase with the highest voltage to ground. In this case, the high leg is specified to be Orange.Rate this question:
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- 23.
⦁ Depth of a ground rod?
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10'
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8'
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15'
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12'
Correct Answer
A. 8'Explanation
The correct answer is 8'. This refers to the depth of a ground rod, which is used for grounding electrical systems. Ground rods are typically made of copper or steel and are driven into the ground to provide a safe path for electrical currents in case of a fault or lightning strike. The depth of the ground rod is important to ensure proper grounding and to meet safety regulations. In this case, the correct depth is 8 feet.Rate this question:
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- 24.
⦁ Max current carrying conductors in a single conduit raceway?
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8
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10
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7
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9
Correct Answer
A. 9Explanation
The correct answer is 9. In a single conduit raceway, the maximum number of current carrying conductors is limited to 9. This is because the National Electrical Code (NEC) specifies that the maximum fill ratio for conductors in a conduit should not exceed 40%. Since each current carrying conductor takes up a certain amount of space within the conduit, the number of conductors must be limited to ensure proper spacing and prevent overheating. Therefore, the maximum number of current carrying conductors in a single conduit raceway is 9.Rate this question:
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- 25.
⦁ What is Ampacity?
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Always flows in the same direction
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Moving in one direction reversed at regular intervals.
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Maximum current in amperes, that a conductor can carry under continuously under the conditions of use without exceeding its temperature rating.
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Provided that the temperature remains constant, the ratio of potential difference (p.d.) across the ends of a conductor (R) to the current (I) flowing in that conductor will also be constant
Correct Answer
A. Maximum current in amperes, that a conductor can carry under continuously under the conditions of use without exceeding its temperature rating.Explanation
Ampacity refers to the maximum current in amperes that a conductor can carry continuously without exceeding its temperature rating. This means that the conductor can handle this amount of current without overheating or causing any damage. It is important to consider ampacity when designing electrical systems to ensure that the conductors are sized appropriately to handle the expected current load.Rate this question:
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- 26.
⦁ Minimum service for a single family home?
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100A
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50A
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30A
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200A
Correct Answer
A. 100AExplanation
The minimum service for a single family home is typically 100A. This means that the electrical system in the home is capable of delivering up to 100 amps of current at a time. This is sufficient for most residential needs, including powering appliances, lighting, and other electrical devices. A 100A service is considered standard for a single family home and provides enough power for typical household usage.Rate this question:
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- 27.
What is a requirement for someone applying to take the Chicago 303 Supervising Electrician exam?
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Must have at least 5 years of experience under a licensed supervising electrician.
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Must have completed a bachelor's degree in Electrical Engineering.
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Must hold a current Electrician's Helper license.
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Must be at least 21 years old.
Correct Answer
A. Must have at least 5 years of experience under a licensed supervising electrician.Explanation
The Chicago Supervising Electrician exam is designed for experienced electricians who want to advance their careers and oversee other electricians. The primary requirement is to have at least 5 years of practical experience working under the supervision of a licensed supervising electrician. This ensures that candidates have the necessary skills and knowledge to lead and manage electrical projects.Rate this question:
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- 28.
⦁ Impedance is the total opposition of a circuit or part of a circuit to the passage of an electric current through it.
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True
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False
Correct Answer
A. TrueExplanation
Impedance refers to the total opposition that a circuit or a part of a circuit offers to the flow of electric current. It is a measure of the resistance, reactance, and phase angle between voltage and current in an AC circuit. Therefore, the given statement is true as it accurately defines the concept of impedance.Rate this question:
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- 29.
⦁ Is a Volt a unit of EMF?
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True
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False
Correct Answer
A. TrueExplanation
A Volt is indeed a unit of electromotive force (EMF). EMF is the measure of the electric potential difference between two points in an electrical circuit, and it is measured in volts. Therefore, it is correct to say that a Volt is a unit of EMF.Rate this question:
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- 30.
⦁ What to do when live wires are found?
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Fix it immediately.
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Contact the General Contractor
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Contact the owner.
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Contact an immediate supervisor.
Correct Answer
A. Contact an immediate supervisor.Explanation
When live wires are found, it is important to contact an immediate supervisor. This is because the supervisor is responsible for managing the safety of the work environment and will have the knowledge and authority to handle the situation appropriately. They can take the necessary steps to ensure the safety of everyone involved, such as calling in a qualified electrician to fix the issue or shutting off power to the area if needed. Contacting the immediate supervisor is the most efficient and effective way to address the presence of live wires.Rate this question:
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- 31.
⦁ Who has the authority to interpret code?
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Supervising Electrician
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AHJ (Building Commissioner)
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The owner
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Inspector
Correct Answer
A. AHJ (Building Commissioner)Explanation
The AHJ (Building Commissioner) has the authority to interpret code because they are responsible for enforcing building codes and regulations. They have the knowledge and expertise to understand and interpret the codes and ensure that they are followed correctly. The AHJ is typically a government official or agency that is responsible for ensuring the safety and compliance of buildings and construction projects.Rate this question:
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- 32.
⦁ Arch-Fault Circuit Breakers are required in
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Dwelling Units, Dormitory, Guest and Guest Suites
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Class I locations.
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Hotels, dormitories, and commercial spaces
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Hotels
Correct Answer
A. Dwelling Units, Dormitory, Guest and Guest SuitesExplanation
Arch-Fault Circuit Breakers are required in Dwelling Units, Dormitory, Guest and Guest Suites. This means that in residential buildings such as houses, apartments, and other living spaces, as well as in dormitories and guest rooms, Arch-Fault Circuit Breakers are necessary. These circuit breakers are designed to detect and prevent dangerous electrical arcs that can cause fires, making them essential for ensuring the safety of occupants in these types of locations.Rate this question:
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- 33.
⦁ Outside circuits and feeders shall have a clearance from a window of
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3'
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6'
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1'
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6"
Correct Answer
A. 3'Explanation
Outside circuits and feeders should have a clearance of 3 feet from a window. This clearance is necessary to ensure the safety of the electrical system and to prevent any potential hazards. Having a sufficient distance between the electrical components and the window reduces the risk of electrical shock or fire caused by any potential faults or malfunctions in the system. It also allows for proper maintenance and inspection of the electrical equipment without obstruction from the window.Rate this question:
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- 34.
⦁ Disconnect location for a sign?
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Electrical room
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4'
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Right before it enters the sign.
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3'
Correct Answer
A. Right before it enters the sign.Explanation
The correct answer is "Right before it enters the sign." This means that the disconnect location for a sign is located right before the electrical wiring enters the sign. This is important because it allows for easy access to disconnect the power supply to the sign for maintenance or repairs without having to shut off power to the entire electrical room.Rate this question:
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- 35.
⦁ Minimum PPE gear should be worn on a job site?
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Hard Hat, Gloves, eyewear, and shoes.
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Hard Hat and boots.
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Hard Hat, Gloves, and ear plugs.
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Hard Hat, shoes, and vest
Correct Answer
A. Hard Hat, Gloves, eyewear, and shoes.Explanation
The minimum PPE gear that should be worn on a job site includes a hard hat to protect the head from falling objects, gloves to protect the hands from cuts and abrasions, eyewear to protect the eyes from debris and chemicals, and shoes to protect the feet from hazards such as sharp objects and electrical hazards.Rate this question:
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- 36.
⦁ What is Electric Current?
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Are properties of an electrical circuit that opposes current.
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Measured in Amperes, movement or flow of electricity.
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An alternating current flows through a conductor, there is an inductive action whereby the current in the conductor is forced toward its surface.
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Converting electrical in an AC system at one voltage or current into electrical power at some other voltage or current the use of rotating parts.
Correct Answer
A. Measured in Amperes, movement or flow of electricity.Explanation
Electric current refers to the movement or flow of electricity. It is measured in Amperes. This means that it quantifies the rate at which electric charges are flowing through a conductor. The flow of electric current is essential for the functioning of electrical circuits and devices. It is the movement of these electric charges that enables the transfer of energy and the operation of various electrical components.Rate this question:
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- 37.
⦁ If a faulty temporary GFCI receptacle is found, what should happen?
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Notify supervisor on-site.
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Contact the General Contractor
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Contact the owner
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Fix it immediately
Correct Answer
A. Notify supervisor on-site.Explanation
If a faulty temporary GFCI receptacle is found, the appropriate action to take would be to notify the supervisor on-site. This is because the supervisor is responsible for overseeing the work and ensuring safety protocols are followed. By informing the supervisor, they can take the necessary steps to address the issue, such as replacing the faulty receptacle or contacting the appropriate personnel to fix it. It is important to prioritize safety and proper communication in such situations.Rate this question:
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- 38.
⦁ Is a central location within a multi-unit building allowed for overcurrent devices?
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True
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False
Correct Answer
A. TrueExplanation
In a multi-unit building, it is allowed to have a central location for overcurrent devices. This central location is typically where the main electrical panel is located, and it serves as a distribution point for the electrical supply to all the units in the building. Having a central location for overcurrent devices allows for easier maintenance and troubleshooting of electrical issues, as well as better organization and protection of the electrical system. Therefore, the statement "Is a central location within a multi-unit building allowed for overcurrent devices?" is true.Rate this question:
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- 39.
GFCI protection is required for which of following
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Office receptacles
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Vending Machines
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Corridor receptacles
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Bedroom receptacles
Correct Answer
A. Vending MachinesExplanation
GFCI protection is required for vending machines because they are typically located in areas where there is a higher risk of water or moisture exposure. GFCI protection helps to prevent electrical shock in case of any faults or leaks in the vending machine's electrical system.Rate this question:
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- 40.
⦁ No grounded conductor shall be attached to any terminal or lead so as to reverse the designated polarity?
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True
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False
Correct Answer
A. TrueExplanation
This statement is true because attaching a grounded conductor to a terminal or lead in a way that reverses the designated polarity can cause electrical hazards and damage to the equipment. The grounded conductor is intended to provide a safe path for electrical current in the event of a fault, and reversing the polarity can disrupt this path and potentially create a dangerous situation. Therefore, it is important to adhere to the proper polarity when connecting grounded conductors to terminals or leads.Rate this question:
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- 41.
⦁ Minimum size common grounding electrode in a High Rise building?
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#1/0
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#8
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#4/0
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20A#6
Correct Answer
A. #4/0Explanation
The minimum size common grounding electrode in a high-rise building is #4/0. This size is necessary to ensure that the grounding system can effectively dissipate electrical faults and provide a safe path for electrical currents. Using a smaller size would not be sufficient to handle the potential electrical load and could result in safety hazards.Rate this question:
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- 42.
⦁ Henry is a unit of Inductance?
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True
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False
Correct Answer
A. TrueExplanation
The statement is true because Henry is indeed a unit of inductance. Inductance is a property of an electrical circuit that opposes changes in current, and it is measured in henries. The unit is named after Joseph Henry, an American scientist who made important contributions to the study of electromagnetism.Rate this question:
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- 43.
⦁ Clearance from roofs for communication cables?
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10'
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8'
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15'
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18'
Correct Answer
A. 8'Explanation
The correct answer is 8'. This means that there should be a clearance of 8 feet from the roofs for communication cables. This clearance is necessary to ensure that the cables are not obstructed or damaged by any objects or structures on the roof. It also allows for proper installation and maintenance of the cables.Rate this question:
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- 44.
⦁ Clearance of above roof for CATV cables?
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12'
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15'
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8'
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18'
Correct Answer
A. 8'Explanation
The clearance of above roof for CATV cables is 8 feet.Rate this question:
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- 45.
⦁ What is EMF?
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Always flows in the same direction
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Measured in Amperes, movement or flow of electricity.
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Moving in one direction reversed at regular intervals.
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FORCE or pressure, measured in Volts, which makes the electrons move or tends to do so.
Correct Answer
A. FORCE or pressure, measured in Volts, which makes the electrons move or tends to do so.Explanation
EMF stands for electromotive force, which is a FORCE or pressure that is measured in Volts. This force is responsible for making electrons move or tends to do so. It is important to note that EMF always flows in the same direction.Rate this question:
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- 46.
⦁ What is the Inner diameter of a 3” RMC?
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4.050
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3.570
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5.073
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3.090
Correct Answer
A. 3.090Explanation
The inner diameter of a 3" RMC is 3.090 inches.Rate this question:
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- 47.
⦁ Resistance is the
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Name given to the opposition of current
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Equals the resistance to reactance
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Name given that current flows through an insulator
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Non of the above
Correct Answer
A. Name given to the opposition of currentExplanation
Resistance is the name given to the opposition of current. It refers to the property of a material or component to resist the flow of electric current. It is measured in ohms and is caused by factors such as the material's conductivity, length, and cross-sectional area. Resistance limits the flow of current and converts electrical energy into heat. It is an essential concept in electrical circuits and plays a crucial role in determining the behavior and characteristics of electrical components.Rate this question:
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- 48.
⦁ What does this symbol represent?
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Adjustable capacitor
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Capacitor
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Battery
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Disconnect
Correct Answer
A. CapacitorExplanation
The symbol represents a capacitor. A capacitor is an electronic component used to store and release electrical energy. It consists of two conductive plates separated by an insulating material, and the symbol represents these plates with curved lines. The symbol is commonly used in circuit diagrams to indicate the presence of a capacitor.Rate this question:
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- 49.
⦁ Which covers both NEMA 6 and 6P?
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Sleet
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Wind blown dust
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Rain, Snow and Sleet
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Hose down
Correct Answer
A. Rain, Snow and SleetExplanation
The option "Rain, Snow and Sleet" covers both NEMA 6 and 6P standards. These standards ensure protection against harsh environmental conditions such as rain, snow, and sleet. NEMA 6P extends the protection to include temporary submersion, making it suitable for more demanding outdoor and industrial applications.Rate this question:
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