Question 61
A 240 V baseboard heater circuit has a total load of 3 kW. Approximately what current will this circuit draw, assuming purely resistive load?
Question 62
A three-phase 208 V motor has a line current of 15 A and a power factor of 0.8. Approximately what is its real power output if efficiency is neglected?
Question 63
A Level 4 apprentice measures 230 V from line to neutral and 398 V line-to-line on a three-phase system. What type of system is this most consistent with?
Question 64
A 60 W, 120 V lamp is connected to a 120 V supply. Approximately how much current does it draw?
Question 65
You measure 10 A flowing through a 24 Ω resistor in a heating circuit. What is the approximate supply voltage?
Question 66
A 9 kW, 240 V electric heater is connected to a single-phase supply. What is the approximate current draw?
Question 67
A three-phase, 208 V, 15 kW load has a power factor of 0.9. Approximately what line current will it draw?
Question 68
Which formula expresses Ohm's law?
Question 69
A 120 V circuit supplies a single resistive load of 24 Ω. What is the current drawn by the load?
Question 70
A 240 V water heater draws 12 A of current. Approximately how much power does it consume?
Question 71
Which equation correctly represents Ohm's law?
Question 72
A 1200 W baseboard heater is connected to a 120 V circuit. Approximately how much current does it draw?
Question 73
A 240 V single-phase motor draws 12 A at full load. What is the approximate input power if the power factor is 1?
Question 74
A 120 V circuit supplies a single 60 Ω resistive load. Approximately how much current flows in the circuit?
Question 75
A resistive load of 10 A is connected to a 120 V branch circuit. Approximately how much power in kilowatts does this load draw?
Question 76
A 3 kW resistive heater operates on 240 V single-phase. Approximately how much current does it draw?
Question 77
A 120 V circuit supplies a 24 Ω resistive load. What is the current drawn by the load?
Question 78
A 60 W, 120 V incandescent lamp is connected to a 120 V supply. Approximately how much current does the lamp draw?
Question 79
A 120 V circuit supplies a 24 Ω resistive load. According to Ohm's law, what is the current flowing in the circuit?
Question 80
A single-phase 240 V load draws 25 A. What is the apparent power in volt-amperes (VA)?
Question 81
What unit is used to measure electric current?
Question 82
What is the correct formula for Ohm's law relating voltage (V), current (I), and resistance (R)?
Question 83
A 120 V space heater draws 5 A. Approximately how much power in watts does it use?
Question 84
A 120 V circuit supplies a 1440 W baseboard heater. Approximately how much current does the heater draw?
Question 85
A 240 V circuit supplies a load drawing 12 A. What is the resistance of the load?
Question 86
A motor nameplate shows a full-load current of 10 A at 240 V single-phase. Approximately what is its output power if its efficiency is 80% and power factor is 1?
Question 87
What is the effect on current if the voltage of a DC circuit is doubled while resistance remains the same?
Question 88
An apprentice measures 10 ohms of resistance on a heating element connected to a 240 volt single-phase supply. Approximately how much current will the element draw?
Question 89
Which of the following best describes Ohm's law in a simple DC circuit?
Question 90
A 120 V circuit supplies a heater with a resistance of 12 ohms. Approximately how much current will flow when the heater is operating normally?