Electrical Contractor Question & Answers May 15, 2023 By Wat Electrical This article lists 100 Electrical Contractor MCQs for engineering students. All the Electrical Contractor Questions & Answers below include a hint and a link to the relevant topic wherever possible. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Electrical Contractor. An electrical contractor is a business or individual who is responsible for installing, maintaining, and repairing electrical systems in homes, buildings, and other structures. Electrical contractors typically work on projects that involve electrical wiring, lighting, power systems, and control systems. To become an electrical contractor, one typically needs to have a background in electrical engineering or a related field, as well as the necessary licenses and certifications required by local and state authorities. Electrical contractors must also have a good understanding of local building codes and regulations, as well as safety procedures and best practices for electrical work. Electrical contractors can work on a wide range of projects, including new construction projects, renovations and remodeling projects, and maintenance and repair projects. They may also specialize in specific areas of electrical work, such as commercial or industrial electrical systems, or residential electrical systems. The capacitor bank is one of the applications of contactor. Overall, electrical contractors play a crucial role in ensuring that electrical systems are installed and maintained safely and effectively, and they are a vital part of the construction and maintenance industries. 1). What type of electrical contractor works on projects related to high voltage power transmission and distribution? Residential electrical contractor Industrial electrical contractor Commercial electrical contractor Utility electrical contractor Hint 2). Which of the following is an example of a renewable energy source? Coal Natural gas Wind Nuclear Hint 3). What is the purpose of a circuit breaker in an electrical system? To provide electrical power to the system To regulate the voltage of the system To protect the system from electrical overloads and short circuits To control the flow of electricity in the system Hint 4). Which of the following is a common electrical hazard? Excessive heat Sharp edges Loud noise Bright light Hint 5). Which of the following is a common cause of electrical fires? Overloaded circuits Excessive use of extension cords Improperly installed electrical equipment All of the above Hint 6). What is the first step an electrical contractor should take before starting a project? Obtain the necessary permits Hire the necessary workers Purchase the necessary equipment None of the above Hint 7). What is the minimum level of education required to become an electrical contractor? High school diploma Associate’s degree Bachelor’s degree Master’s degree Hint 8). What is the most important safety consideration when working with electrical systems? Using proper tools and equipment Wearing appropriate personal protective equipment Following proper procedures and protocols Having a good understanding of electrical theory Hint 9). What type of electrical contractor typically works on data center projects? Residential electrical contractor Commercial electrical contractor Low-voltage electrical contractor None of the above Hint 10). Which of the following is a common tool used by electrical contractors? Hammer Screwdriver Wire strippers All of the above Hint 11). What type of electrical contractor specializes in renewable energy projects? Solar electrical contractor Wind electrical contractor Hydroelectric electrical contractor None of the above Hint 12). What is the purpose of grounding in an electrical system? To increase the voltage To decrease the voltage To prevent electrical shocks Both a and b Hint 13). Which of the following is a common electrical hazard that electrical contractors must be aware of? Slippery floors Sharp tools Electrical shock All of the above Hint 14). Which of the following is the most common type of residential electrical wiring? Aluminum Copper Steel None of the above Hint 15). What is the purpose of a transformer in an electrical system? To regulate the voltage To protect against electrical shock To provide a ground connection None of the above Hint Read more about Transformers 16). What is the most common cause of electrical fires in residential buildings? Lightning strikes Overloaded circuits Electrical shocks All of the above Hint 17). What is the purpose of bonding in an electrical system? To provide a ground connection To reduce the risk of electrical shock To ensure that all metal components in the system are at the same electrical potential None of the above Hint 18). What is the minimum clearance required between overhead power lines and a building or structure? 5 feet 10 feet 15 feet 20 feet Hint 19). Which of the following is an example of a low-voltage electrical system? A residential lighting system A commercial HVAC system A security and fire alarm system An industrial power plant system Hint 20). Which of the following is a potential advantage of working with a low voltage electrical contractor? Ability to work on larger commercial or industrial projects Expertise in high-voltage electrical systems Familiarity with low-voltage electrical codes and regulations Quick response times to emergencies in residential settings Hint 21). Which of the following may be a typical project for a low voltage electrical contractor? Wiring a large office building Installing a home lighting system Maintaining a factory’s electrical system Powering an oil refinery’s electrical system Hint 22). Which of the following low-voltage systems is commonly installed by a low voltage electrical contractor? Industrial power plant systems Residential heating and cooling systems Security and fire alarm systems Commercial lighting systems Hint 23). What are some common types of electrical equipment that a maintenance electrical contractor may work with? Generators and transformers Circuit breakers and fuses Motors and pumps All of the above Hint 24). What is the purpose of a router in a data network? To connect devices within a local network To connect multiple networks together To manage internet traffic To provide security for the network Hint 25). What is the purpose of a firewall in a data network? To connect devices within a local network To connect multiple networks together To manage internet traffic To provide security for the network Hint Electrical Contractor MCQ for Interviews 26). What is the purpose of a DNS server in a data network? To manage internet traffic To provide security for the network To convert domain names to IP addresses To connect devices within a local network Hint 27). What is the purpose of a VPN in a data network? To connect devices within a local network To connect multiple networks together To manage internet traffic To provide a secure connection between remote devices Hint 28). What is the purpose of a DHCP server in a data network? To manage internet traffic To provide security for the network To assign IP addresses to devices To connect devices within a local network Hint 29). What is the purpose of a modem in a data network? To connect devices within a local network To connect multiple networks together To manage internet traffic To convert digital data to analog signals for transmission over a phone line Hint 30). What is the purpose of a gateway in a data network? To connect devices within a local network To connect multiple networks together To manage internet traffic To provide security for the network Hint 31). What is the purpose of an intrusion detection system? To prevent unauthorized access to a system To detect unauthorized access to a system To protect against malware and viruses To encrypt data transmissions Hint 32). What is the standard form of IDS? Intrusion Detection System Internet Detection System Internal Detection System None of the above Hint 33). What is the purpose of an electrical box? To house electrical devices and protect wiring connections To generate electricity To regulate electrical current None of the above Hint 34). Which of the following is not a type of electrical box? Octagon box Round box Square box Triangle box Hint 35). What is the purpose of a conduit fitting? To attach conduit to electrical boxes To protect conduit from damage To prevent electrical interference Both b and c Hint 36). Which of the following is not a type of conduit fitting? Elbow Tee Union Socket Hint 37). What is the purpose of a cable clamp? To secure cable in an electrical box To connect cable to conduit To regulate electrical current All of the above Hint 38). Which of the following is not a type of cable clamp? Metal cable clamp Plastic cable clamp Non-metallic cable clamp Spring cable clamp Hint 39). What is a conduit used for in electrical installations? To protect and route electrical wiring To provide insulation for electrical connections To connect electrical devices to a power source All of the above Hint 40). What is the purpose of an electrical connector? To join two or more electrical wires together To provide insulation for electrical connections To connect electrical devices to a power source Both b and c Hint 41). What is an electrical fitting used for in electrical installations? To connect electrical devices to a power source To join two or more electrical wires together To provide insulation for electrical connections None of the above Hint 42). What is a grounding wire used for in electrical systems? To provide a safe path for electrical current to flow to the ground To provide insulation for electrical connections To connect electrical devices to a power source None of the above Hint 43). What is a wire nut used for in electrical connections? To join two or more electrical wires together To provide insulation for electrical connections To connect electrical devices to a power source Both b and c Hint 44). What is a panel board used for in electrical systems? To distribute electrical power to various circuits To provide insulation for electrical connections To protect electrical equipment from power surges None of the above Hint 45). What is the standard form of GFCI? Ground Fault Circuit Internal Ground Fault Circuit Interrupter Ground Fault Circuit Intrusion None of the above Hint 46). What is the function of an ammeter? To measure voltage To measure current To measure resistance To measure power Hint 47). What is the function of a voltmeter? To measure voltage To measure current To measure resistance To measure power Hint 48). What is the function of a wattmeter? To measure voltage To measure current To measure power To measure resistance Hint 49). What is the purpose of a demand meter? To measure power consumption over a certain period of time To measure power consumption over a certain period of time To measure voltage fluctuations To measure current fluctuations Hint 50). What is the standard form of NIDS? Network Based Intrusion Detection System Network Based Internet Detection System Network Based Internal Detection System None of the above Hint Electrical Contractor MCQ for Exams 51). What is a circuit tester? A device used to measure voltage A device used to measure current A device used to check for the presence of voltage in a circuit A device used to check for the presence of current in a circuit Hint 52). What is a non-contact voltage tester? A device used to measure voltage without making direct contact with a circuit A device used to measure current without making direct contact with a circuit A device used to measure resistance without making direct contact with a circuit A device used to measure power without making direct contact with a circuit Hint 53). What is a continuity tester? A device used to measure voltage A device used to measure current A device used to check for the presence of voltage in a circuit A device used to check for the presence of a complete electrical path in a circuit Hint 54). What is a GFCI tester? A device used to test for the presence of ground fault current in a circuit A device used to test for the presence of voltage in a circuit A device used to test for the presence of current in a circuit A device used to test for the presence of a complete electrical path in a circuit Hint 55). What is a phase sequence tester? A device used to measure voltage phase angle A device used to measure current phase angle c. A device used to test the phase sequence of a three-phase circuit A device used to test the presence of voltage in a circuit Hint 56). What is a line tester? A device used to measure voltage A device used to measure current A device used to test the continuity of a circuit A device used to test for the presence of a complete electrical path in a circuit Hint 57). What is a cable puller? A device used to cut cables A device used to strip cables A device used to install cables A device used to test cables Hint 58). What is the maximum pulling force of a cable puller? 100 pounds 500 pounds 1000 pounds 5000 pounds Hint 59). What is a fishtape? A device used to cut cables A device used to strip cables A device used to pull cables through conduit A device used to test cables Hint 60). What is the standard form of HIDS? Host Based Intrusion Detection System Host Based Internet Detection System Host Based Internal Detection System None of the above Hint 61). What is a cable grip? A device used to cut cables A device used to strip cables A device used to hold cables during installation A device used to test cables Hint 62). What is a conduit snake? A device used to cut conduit A device used to strip conduit A device used to pull cables through conduit A device used to test conduit Hint 63). What is a conduit bender? device used to cut conduit A device used to strip conduit A device used to bend conduit to a specific angle A device used to test conduit Hint 64). What is a wire stripper? A device used to cut wires A device used to twist wires A device used to strip the insulation off wires A device used to test wires Hint 65). What is the purpose of the cutting blades on a wire stripper? To cut the wire in half To remove the insulation from the wire To twist the wire To test the wire for continuity Hint 66). What is a wire gauge? The diameter of the wire The length of the wire The color of the wire The type of insulation on the wire Hint 67). What is the purpose of the adjustable jaws on a wire stripper? To grip the wire while stripping the insulation To cut the wire to a specific length To twist the wire To test the wire for continuity Hint 68). What is the purpose of the insulation crimping jaws on a wire stripper? To cut the insulation off the wire To strip the insulation off the wire To crimp a connector onto the wire To twist the wire Hint 69). What is a crimping tool? A tool used to strip the insulation off wires A tool used to cut wires to a specific length A tool used to create a permanent connection between a wire and a terminal A tool used to twist wires together Hint 70). What is the purpose of the die on a crimping tool? To cut the wire to a specific length To strip the insulation off the wire To compress the terminal onto the wire To twist the wire Hint 71). What types of terminals can be crimped with a crimping tool? Only insulated terminals Only uninsulated terminals Both insulated and uninsulated terminals None of the above Hint 72). What is the purpose of the ratchet mechanism on a crimping tool? To cut the wire to a specific length To strip the insulation off the wire To compress the terminal onto the wire To provide consistent pressure during the crimping process Hint 73). What is a conduit bender used for? To cut conduit to a specific length To bend conduit into a specific shape or angle To thread conduit to fit a specific connector To pull wires through conduit Hint 74). What type of conduit can be bent with a conduit bender? PVC conduit Flexible conduit EMT (Electrical Metallic Tubing) conduit All of the above Hint 75). What is the purpose of the angle guide on a conduit bender? To help align the conduit for bending To provide leverage for bending the conduit To measure the angle of the bend To hold the conduit in place while bending Hint Electrical Contractor MCQ for Quiz 76). What is the most important safety consideration when using a conduit bender? Wearing eye protection Using gloves to protect your hands Making sure the conduit is securely clamped in place Using a stable and level surface for bending Hint 77). What is a voltage tester used for? To measure the amount of voltage in a circuit To determine if a circuit is live or not To test the continuity of a circuit To test the resistance of a circuit Hint 78). How does a non-contact voltage tester work? It measures the voltage directly using a probe It detects the electric field around a conductor without making contact It measures the current flowing through a conductor It measures the resistance of a circuit Hint 79). What are cable ties used for? To secure and organize cables and wires To connect electrical devices together To measure the voltage of a circuit To test the resistance of a circuit Hint 80). What materials are cable ties typically made from? Steel Nylon Rubber Copper Hint 81). How do you use a cable tie? Slide the tie around the cables and tighten it with pliers Twist the tie around the cables to secure them Tie the ends of the cable together with the tie None of the above Hint 82). What are fish tapes used for? Cutting cables Pulling cables through walls and conduits Measuring cable lengths Securing cables to surfaces Hint 83). What is a fish tape made of? Steel Plastic Fiberglass All of the above Hint 84). How do you use a fish tape? Thread the tape through the conduit and attach the cable to the end Wrap the tape around the cable and pull it through the conduit Tie the tape to the cable and pull both through the conduit together None of the above Hint 85). What is a glow rod? Another name for a fish tape A type of fish tape made from glowing material c. A tool used to guide cables through walls and conduits A tool used to guide cables through walls and conduits None of the above Hint 86). What is the maximum length of a fish tape? 10 feet 50 feet 100 feet 200 feet Hint 87). What is a cordless drill/driver? A tool used for hammering nails A tool used for cutting wood A tool used for drilling holes and driving screws A tool used for painting walls Hint 88). What is the power source for a cordless drill/driver? Electricity from an outlet Batteries Solar panels Gasoline Hint 89). What is the difference between a drill and a driver? A drill is used for drilling holes, while a driver is used for driving screws A drill is more powerful than a driver A driver is cordless, while a drill is not There is no difference Hint 90). What is the chuck on a cordless drill/driver? A part of the motor that powers the tool The part that holds the drill bit or screwdriver bit A safety feature that prevents the tool from overheating None of the above Hint 91). What is torque on a cordless drill/driver? The speed at which the tool rotates The amount of force the tool can apply to a screw or drill bit The size of the tool’s battery The weight of the tool Hint 92). What is the maximum speed of a cordless drill/driver? 500 RPM 1000 RPM 2000 RPM 4000 RPM Hint 93). How is the speed of a cordless drill controlled? By the amount of pressure applied to the trigger By the type of drill bit being used By the size and weight of the tool By the charge level of the battery Hint 94). What is the maximum drill bit size that can be used with a cordless drill? 1/8 inch 1/4 inch 1/2 inch 1 inch Hint 95). What is the voltage of a typical cordless drill battery? 35V 18V 24V 36V Hint 96). What is the chuck key used for on a cordless drill? To turn the drill on and off To adjust the speed of the drill To tighten and loosen the chuck To change the battery Hint 97). What is a right-angle drill used for? Drilling in tight spaces Drilling holes at an angle Driving screws and other fasteners All of the above Hint 98). What is a rotary hammer drill used for? Drilling holes in concrete and masonry Driving screws and other fasteners Drilling holes in wood and metal All of the above Hint 99). What is a drill press used for? Precise drilling in a variety of materials Heavy-duty drilling in tough materials Driving screws and other fasteners Drilling at an angle Hint 100). What is a multi-purpose cordless tool used for? A variety of tasks, including cutting, sanding, and grinding Driving screws and other fasteners Drilling holes in wood and metal Heavy-duty drilling in tough materials Hint For More MCQs Electrical Inductors Questions & Answers.Electrical Cables Questions & Answers.Electrical Drive Questions & Answers.Electrical Tariff Questions & Answers.Electrical Conductor Questions & Answers.Electrical Insulator Questions & Answers.Electrical Wiring Questions & Answers. Time's up
