Deck 41: Series, Parallel, and Series-Parallel Circuits

Question 1

The amperage in a series circuit is ________.

A)High at the beginning of the circuit and decreases as the current flows through the resistance
B)The same anywhere in the circuit
C)Varies in the circuit due to the different resistances
D)Always less returning than leaving the battery

Answer 1

The same anywhere in the circuit

Question 2

What type of circuit is this?

A)Open circuit
B)Parallel circuit
C)Series-parallel circuit
D)Series circuit

Answer 2

Series-parallel circuit

Question 3

What is the total resistance of this circuit?

A)4 ohms
B)3 ohms
C)36 ohms
D)Not enough information

Answer 3

4 ohms

Question 4

Calculate the current flow in this circuit. (Round off to 2 decimal points.)

A)About 0.33 amps
B)About 3 amps
C)About 0.95 amps
D)About 1.05 amps

Question 5

What is the total current flow in this parallel circuit?

A)2.5 A
B)3.7 A
C)Not enough information
D)0.4 A

Question 6

Which one of the bulbs in this circuit will drop (use up) the most voltage?

A)They will all drop the same amount of voltage
B)Bulb 1
C)Bulb 3
D)Bulb 2

Question 7

How much current will flow in this circuit?

A)12 amps
B)3 amps
C)2 amps
D)None of these

Question 8

Two bulbs are connected in parallel to a 12-volt battery. One bulb has a resistance of 6 ohms and the other bulb has a resistance of 2 ohms. Technician A says that only the 2-ohm bulb will light because all of the current will flow through the path with the least resistance and no current will flow through the 6-ohm bulb. Technician B says that the 6-ohm bulb will be dimmer than the 2-ohm bulb. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 9

What is the total resistance in this circuit?

A)12 ohms
B)6 ohms
C)3 ohms
D)None of these

Question 10

Technician A says that electronic calculators have a memory function that can be used to calculate resistance, current, and voltage values for a parallel circuit. Technician B says to separate components of a
Series-parallel circuit to simplify calculations. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 11

Two light bulbs are wired in series and one bulb burns out (opens.) Technician A says that the other bulb will still work. Technician B says that the current will increase in the circuit because one electrical load (resistance) is no longer operating. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 12

In a series circuit, total circuit resistance is equal to the ________ of the resistance of all loads in the circuit.

A)Dividend
B)Difference
C)Sum
D)None of these

Question 13

If resistance is reduced in a series circuit, ________ current will flow.

A)More
B)The same
C)Less
D)None of these

Question 14

Kirchhoff's law states that the voltage around a closed circuit is equal to the sum of ________ across all the loads.

A)Resistances
B)Voltage drops
C)Both A and B
D)Neither A nor B

Question 15

An electrical load ________.

A)Has electrical resistance
B)May be unwanted resistance caused by corrosion
C)May be an electrical device
D)All of these

Question 16

In a series circuit with more than one load, the highest resistance will drop ________ voltage than any smaller resistance.

A)The same amount of
B)More
C)Less
D)None of these

Question 17

Technician A says that Ohm's law can be used to determine circuit current flow if total circuit resistance and total voltage are known. Technician B says that Ohm's law can be used to calculate the unknown resistance of a load in a circuit if total current and source voltage are known. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 18

Voltage drop is a better measurement of resistance than testing static resistance because ________.

A)Current flow creates heat which adds to circuit resistance
B)The resistance specification for the component is not required for diagnosis
C)Both A and B
D)Neither A nor B

Question 19

In a series circuit ________.

A)Current flow is constant at any point in the circuit
B)Total circuit resistance is equal to the sum of all resistances in the circuit
C)Both A and B
D)Neither A nor B

Question 20

In a parallel circuit ________.

A)Current flow through each branch of the circuit depends on the resistance present in that branch
B)There is more than one path for current flow
C)Both A and B
D)Neither A nor B

Question 21

The current flowing into each junction of a parallel circuit ________ the current flow at the junction on the opposite end of that branch.

A)Is less than
B)Is more than
C)Equals
D)None of these

Question 22

The total circuit resistance of a parallel circuit is always ________ the lowest resistance present in any branch of the circuit.

A)More than
B)Less than
C)Equal to
D)None of these

Question 23

The voltage drop for each branch of a parallel circuit is ________.

A)Reduced by the resistance of loads in each branch
B)Increased by the resistance of loads in each branch
C)Equal
D)None of these

Question 24

The sum of currents in each branch of a parallel circuit will ________ total circuit current.

A)Be more than
B)Be less than
C)Equal
D)None of these

Question 25

More electrical current will tend to flow through the branch of a parallel circuit with ________ resistance.

A)Lowest
B)Infinite
C)Highest
D)None of these

Question 26

Knowledge of parallel circuit fundamentals is necessary to diagnose ________.

A)Port fuel injection circuits
B)Add-on lighting circuits
C)Diesel glow plug circuits
D)All of these

Question 27

If one branch of a parallel circuit loses continuity, the other branches will still each receive source voltage and ground.

Question 28

As additional branches are added to a parallel circuit, total circuit amperage ________.

A)Remains the same
B)Increases
C)Decreases
D)None of these

Question 29

As additional branches are added to a parallel circuit, total circuit resistance ________.

A)Increases
B)Decreases
C)Remains the same
D)None of these