Question 1
In electrical theory, how is voltage best described?
Question 2
In a properly wired parallel lighting circuit, what happens if one lamp fails open (burns out)?
Question 3
Two 12 Ω resistors are connected in parallel across a supply. What is the equivalent resistance of the combination?
Question 4
In a simple series circuit, what happens to the circuit current if an additional resistor is added in series?
Question 5
In a residential lighting circuit, what happens to the total resistance if identical light fixtures are added in parallel?
Question 6
A 120 V, 1-phase branch circuit supplies a 12 A load located 45 m from the panel using copper conductors. The initial installation used 14 AWG, resulting in excessive voltage drop. Which corrective action is MOST appropriate?
Question 7
A 120 V circuit supplies two resistive loads in series: one is 10 Ω and the other is 20 Ω. What is the total circuit resistance?
Question 8
In a simple DC circuit, if voltage is doubled and resistance stays the same, what happens to the current?
Question 9
Which statement best describes voltage in an electrical circuit?
Question 10
In a simple series circuit, what happens to the total resistance when an additional resistor is added in series?
Question 11
Two resistors, 10 Ω and 20 Ω, are connected in series. What is the total resistance of the circuit?
Question 12
Which factor will most effectively reduce voltage drop on a long feeder supplying a constant load current?
Question 13
In a 120/240 V single-phase residential system, what is the nominal voltage between one hot conductor and the neutral?
Question 14
Which of the following best describes a parallel circuit?
Question 15
In a 120/240 V single-phase system, what is the nominal voltage measured between the two hot legs?
Question 16
Which unit is used to measure electric current in a circuit?
Question 17
In a simple series circuit with three identical lamps, what happens if one lamp burns out (opens)?
Question 18
Which statement best describes a series circuit?
Question 19
Two resistors of 10 Ω and 20 Ω are connected in series in a circuit. What is the total resistance?
Question 20
Which statement best describes a parallel circuit?
Question 21
In a series circuit, how is the current related in each component?
Question 22
In a simple series lighting circuit with three identical lamps, how does the current in each lamp compare?
Question 23
Two identical 60 W, 120 V lamps are connected in parallel on a 120 V circuit. Approximately how much current does the circuit draw when both lamps are on?
Question 24
What is the unit of electric current used in electrical calculations and on nameplates?
Question 25
If the voltage in a simple resistive circuit is held constant and the resistance is increased, what happens to the current?
Question 26
In a parallel lighting circuit, what is the relationship of the voltage across each lamp compared to the supply voltage?
Question 27
What is the total resistance of three 10-ohm resistors connected in parallel?
Question 28
Three 10-ohm resistors are in parallel. What is the total resistance?
Question 29
In basic electrical theory, which term describes the 'pressure' that causes current to flow in a circuit?
Question 30
In a simple series lighting circuit with three lamps, what happens if one lamp fails open (burns out)?