Ultimate NCCER201 Certification Q&A Guide:
Complete Study Vault for Construction and Safety
Exam Mastery
1. Which of the following is true regarding a series circuit?
- ANSWER The current flow is the same through all resistors.
2. Which of the following is true regarding a parallel circuit?
- ANSWER It has more than one path for current flow.
3. Which of the following is true regarding a series-parallel circuit?
- ANSWER If a circuit is reduced to an equivalent series circuit, the total resistance
is found by adding the loads.
4. Two branches of a circuit (R1 and R2) across a 120V power line draw a
total line current of 30A. Branch R1 takes 15A. What s the current I2 in
branch R2?
- ANSWER 15A
5. Who stated that the current entering a point must equal the total current
leaving that point?
- ANSWER kirchhoff
6. In a circuit with an applied voltage of 10V and the voltage drop of E1 = 5V,
and E3= ?, the value of E3 must be__________?
- ANSWER 3V
,7. True or False? You can use ohm's law to find the value of each branch
current in a parallel circuit.
- ANSWER True
8. Find the total resistance in a series circuit with three resistances of 10Ω,
20Ω, & 30Ω.
- ANSWER 60Ω
9. In a parallel circuit, the voltage across each path is equal to the _________?
- ANSWER applied voltage
10. The total resistance in RQ01 is ________?
- ANSWER 100Ω
11. The value for total current in figure RQ02 is _______?
- ANSWER 5A
12. A resistor of 32Ω is in parallel with a resistor of 36Ω, and a 54Ω resistor is
in series with the pair. When 350V is applied to the combination, the current
through the 54Ω resistor is ________?
- ANSWER 4.93A
13. A 242Ω resistor is in parallel with a 180Ω resistor, and a 420Ω is in series
with the combination in a 27V circuit. A current of 22mA flows through the
242Ω resistor. The current through the 180Ω resistor is ______?
- ANSWER 29.6Ma
, 14. Which statement is not correct relative to Kirchhoff's law?
Kirchhoff's law applies to current only.
15. Kirchhoff's voltage law states that the algebraic sum of the voltages
around any closed current path is ______?
- ANSWER Zero
16. Two 24Ω resistors are in parallel, and a 42Ω resistor is in series with the
combination. When 78V is applied to the resistors, the voltage drop across the
42Ω resistor is about _____?
- ANSWER 60.5V
17. _______ states that the total amount of current flowing through a parallel
circuit is equal to the sum of the amounts of current flowing through each
current path.
- ANSWER Kirchhoff's current law
18. ____________ states the the sum of all the voltage drops in a circuit is
equal to the source voltage of the circuit
- ANSWER Kirchhoff's voltage law
19. ____________ contain both series and parallel current paths.
- ANSWER Series-parallel circuits
______________ contain two or more parallel paths through which the
current can flow.
- ANSWER Parallel circuits
A ___________ contains only one path for current to flow.
Complete Study Vault for Construction and Safety
Exam Mastery
1. Which of the following is true regarding a series circuit?
- ANSWER The current flow is the same through all resistors.
2. Which of the following is true regarding a parallel circuit?
- ANSWER It has more than one path for current flow.
3. Which of the following is true regarding a series-parallel circuit?
- ANSWER If a circuit is reduced to an equivalent series circuit, the total resistance
is found by adding the loads.
4. Two branches of a circuit (R1 and R2) across a 120V power line draw a
total line current of 30A. Branch R1 takes 15A. What s the current I2 in
branch R2?
- ANSWER 15A
5. Who stated that the current entering a point must equal the total current
leaving that point?
- ANSWER kirchhoff
6. In a circuit with an applied voltage of 10V and the voltage drop of E1 = 5V,
and E3= ?, the value of E3 must be__________?
- ANSWER 3V
,7. True or False? You can use ohm's law to find the value of each branch
current in a parallel circuit.
- ANSWER True
8. Find the total resistance in a series circuit with three resistances of 10Ω,
20Ω, & 30Ω.
- ANSWER 60Ω
9. In a parallel circuit, the voltage across each path is equal to the _________?
- ANSWER applied voltage
10. The total resistance in RQ01 is ________?
- ANSWER 100Ω
11. The value for total current in figure RQ02 is _______?
- ANSWER 5A
12. A resistor of 32Ω is in parallel with a resistor of 36Ω, and a 54Ω resistor is
in series with the pair. When 350V is applied to the combination, the current
through the 54Ω resistor is ________?
- ANSWER 4.93A
13. A 242Ω resistor is in parallel with a 180Ω resistor, and a 420Ω is in series
with the combination in a 27V circuit. A current of 22mA flows through the
242Ω resistor. The current through the 180Ω resistor is ______?
- ANSWER 29.6Ma
, 14. Which statement is not correct relative to Kirchhoff's law?
Kirchhoff's law applies to current only.
15. Kirchhoff's voltage law states that the algebraic sum of the voltages
around any closed current path is ______?
- ANSWER Zero
16. Two 24Ω resistors are in parallel, and a 42Ω resistor is in series with the
combination. When 78V is applied to the resistors, the voltage drop across the
42Ω resistor is about _____?
- ANSWER 60.5V
17. _______ states that the total amount of current flowing through a parallel
circuit is equal to the sum of the amounts of current flowing through each
current path.
- ANSWER Kirchhoff's current law
18. ____________ states the the sum of all the voltage drops in a circuit is
equal to the source voltage of the circuit
- ANSWER Kirchhoff's voltage law
19. ____________ contain both series and parallel current paths.
- ANSWER Series-parallel circuits
______________ contain two or more parallel paths through which the
current can flow.
- ANSWER Parallel circuits
A ___________ contains only one path for current to flow.
