AUT 242-Chapter 2 Exam Questions and Answers Fully Solved Latest Update 2025-2026
1. What is included in a complete electrical circuit? - Answers Power source, protection, power path,
electrical load and return path (ground)
2. What is the difference between a short-to-voltage and a short-to-ground? - Answers Short-to-voltage
occurs when the power side of one circuit is electrically connected to the power side of another circuit.
Short-to-ground is a type of short circuit that occurs when the current bypasses part of the normal
circuit and flows directly to ground.
3. What is the difference between an electrical open and a short? - Answers Electrical open in a circuit
breaks the path of current flow. The open can be any break in the power side, load, or ground side of a
circuit.
Short is a complete circuit in which the current usually bypasses some or all of the resistance in the
circuit and it involves the power side of the circuit.
4. What is Ohm's law? - Answers It requires 1 volt to push 1 ampere through 1 ohm of resistance. This
means that if the voltage is doubled, then the number of amperes of current flowing through a circuit
will also double if the resistance of the circuit remains the same.
5. What occurs to current flow (amperes) and wattage if the resistance of a circuit is increased because
of a corroded connection? - Answers The current flow (amperes) stays the same and the wattages
increases
1. If an insulated wire rubbed through a part of the insulation and the wire conductor touched the steel
body of a vehicle, the type of failure would be called a(n). - Answers (b) short-to-ground
2. If two insulated wires were to melt together where the copper conductors touched each other, the
type of failure would be called a(n) . - Answers (a) short-to-voltage
3. If 12 volts are being applied to a resistance of 3 ohms, how many amperes will flow? - Answers (c) 4
amperes will flow
4. How many watts are consumed by a light bulb if 1.2 amperes are measured when 12 volts are
applied? - Answers (a) 14.4 watts
5. How many watts are consumed by a starter motor if it draws 150 amperes at 10 volts? - Answers (c)
1,500 watts
6. High resistance in an electrical circuit can cause - Answers (d) Dim lights, slow motor operation and
clicking of relays or solenoids
1. What is included in a complete electrical circuit? - Answers Power source, protection, power path,
electrical load and return path (ground)
2. What is the difference between a short-to-voltage and a short-to-ground? - Answers Short-to-voltage
occurs when the power side of one circuit is electrically connected to the power side of another circuit.
Short-to-ground is a type of short circuit that occurs when the current bypasses part of the normal
circuit and flows directly to ground.
3. What is the difference between an electrical open and a short? - Answers Electrical open in a circuit
breaks the path of current flow. The open can be any break in the power side, load, or ground side of a
circuit.
Short is a complete circuit in which the current usually bypasses some or all of the resistance in the
circuit and it involves the power side of the circuit.
4. What is Ohm's law? - Answers It requires 1 volt to push 1 ampere through 1 ohm of resistance. This
means that if the voltage is doubled, then the number of amperes of current flowing through a circuit
will also double if the resistance of the circuit remains the same.
5. What occurs to current flow (amperes) and wattage if the resistance of a circuit is increased because
of a corroded connection? - Answers The current flow (amperes) stays the same and the wattages
increases
1. If an insulated wire rubbed through a part of the insulation and the wire conductor touched the steel
body of a vehicle, the type of failure would be called a(n). - Answers (b) short-to-ground
2. If two insulated wires were to melt together where the copper conductors touched each other, the
type of failure would be called a(n) . - Answers (a) short-to-voltage
3. If 12 volts are being applied to a resistance of 3 ohms, how many amperes will flow? - Answers (c) 4
amperes will flow
4. How many watts are consumed by a light bulb if 1.2 amperes are measured when 12 volts are
applied? - Answers (a) 14.4 watts
5. How many watts are consumed by a starter motor if it draws 150 amperes at 10 volts? - Answers (c)
1,500 watts
6. High resistance in an electrical circuit can cause - Answers (d) Dim lights, slow motor operation and
clicking of relays or solenoids
