CWEA E/I 2 Study Guide Quest Questions & Answer Solved 100%

Receiving job instruction and planning equipment use are part of: a. craft data. b. job preparation. c. work factors. d. leveled time. - Answer b. job preparation Anticipating other tasks or problems: a. usually creates additional problems. b. wastes time. c. sharply reduces the number of emergencies. d. often is not worth the effort. - Answer c sharply reduces the number of emergencies Making job planning a group effort: a. wastes time. b. improves productivity. c. causes confusion. d. All the above - Answer b improves productivity Rubber safety gloves should be tested how often? a Every 12 months b. Every 9 months c. Every 6 months d. Every 4 months - Answer a Every 12 months Rubber safety blankets should be tested how often? a. Every 6 months b. Every 9 months c. Every 12 months d. Every 18 months - Answer b Every 9 months What is the interrupting current of a GFIC receptacle? a. 20 VAL b. 5 MA c. 10 UDL d. 20 MA - Answer b 5 MA What type of stepladder is forbidden while working on electrical equipment? a. Wood b. Fiberglass c. Aluminum d. Ceramic - Answer c Aluminum What is the killer of electrical shock? a. Voltage b. Current c. Resistance d. Ohms - Answer b Current The relationship between an electric current and a magnetic field is called: a. matter. b. atoms. c. electromagnetism. d. element - Answer c electromagnetism Electrons flowing from one place to another make a: a. current. b. track. c. circuit. d. channel - Answer a current Between two objects, the development of static charges creates a: a. potential difference. b. battery. c. thermocouple. d. resistance - Answer a potential difference A coil of wire that carries an electric current is called a: a. conductor. b. thermocouple. c. electrocurrent. d. electromagnet - Answer d electromagnet Metals are good conductors because they have many: a. insulators. b. free electrons. c. resistors. d. inductors. - Answer b free electrons The amount of potential difference a layer of insulation can withstand without breaking down is: a. resistance. b. voltage drop. c. dielectric strength. d. ampacity - Answer c dielectric strength What is the property of a coil of wire that opposes any change in the current in the coil? a. Inductance b. Resistance c. Impedance d. Watts - Answer a Inductance What is the correct name for "voltage" or electromotive force? a. Element b. Electron c. Circuit d. Potential difference - Answer d Potential difference A rate of flow of one coulomb per second is called one: a. ampere. b. joule. c. volt. d. olhum. - Answer a ampere What is the name for the proportional relationship between potential difference and current? a. Voltage drop b. Voltmeter c. Ampmeter d. Watt meter - Answer b Voltmeter What is the unit of measurement for capacitive reactance? a. Volts b. Ohms c. Amps d. Power factor - Answer b Ohms Power companies use AC generators because AC can be sent over long distances: a. at high cost. b. at low cost. c. slower. d. faster. - Answer b at low cost What device changes alternating current to a different combination of voltage and current? a. Generator b. Capacitor c. Alternator d. Transformer - Answer d Transformer How does the power going into a transformer compare to the power coming out? a. Lower b. Equal c. Double d. Higher - Answer b Equal What changes continuously around the conductor when current changes continuousl in AC circuits? a. Voltage b. Current c. Magnetic field d. Amps - Answer c Magnetic field Wires and cables can be classified according to their: a. color. b. size. c. covering. d. shape. - Answer c covering. What kind of starter provides full-voltage starting? a. Across-the-line b. Synchronous start c. Reactor starter d. Reduced-voltage start - Answer a Across-the-line The choice between across-the-line starting and reduced-voltage starting depends in part on the size of the: a. starter. b. wire size. c. motor. d. breaker. - Answer c motor. The most important requirement for good maintenance of motor starters is: a. good record keeping. b. safety of personnel. c. proper lubrication. d. clean, dry insulation - Answer c proper lubrication A reversing starter reverses a three-phase motor by interchanging: a. main contacts. b. two of the line leads. c. all of the line leads. d. control voltage. - Answer b two of the line leads What kind of protection is provided in a manual across-the-line three-phase motor control? a. Overload protection only b. Ground-fault protection only c. Short-circuit protection only d. All of the above - Answer a Overload protection only Commonly used instead of fuses in industrial power distribution systems are: a. disconnects. b. motor starters. c. overcurrent relays. d. circuit breakers. - Answer d circuit breakers. Distribution protection usually consists of two elements, protection of both: a. equipment and circuit. b. personnel and equipment. c. wire and control relay. d. ground fault and current. - Answer a equipment and circuit What is the current in amperes of a 120-volt circuit with a resistance of 60 ohms, using Ohm's Law? a. 0.5 amperes b. 2.0 amperes c. 30 amperes d. 10 amperes - Answer b 2.0 amperes Solving for I: I = ER Substituting values into the equation: I = 120 volts/60 Ohms = 2 amperes What is the current for a 120-volt circuit with a 1440-watt load? a. 0.083 amperes b. 10 amperes c. 12 amperes d. 15 amperes - Answer c 12 amperes Since P = EI, current can be determined as I = P/E Substituting values into the equation: I = 1440 watts /120 volts = 12 amperes