ASM CDC Volume 1 Questions and
Answers Graded A+
Why is it important to properly ground electrical equipment?
✔✔Proper grounding prevents electrical shock hazards by providing a safe path for electricity to
follow in case of a fault.
What does the term "overcurrent" mean in electrical circuits?
✔✔Overcurrent refers to a situation where the current flowing through a circuit exceeds its safe
capacity, potentially causing damage or fire.
What is the function of a fuse in an electrical system?
✔✔A fuse protects electrical circuits by breaking the circuit if the current exceeds a specified
limit, preventing damage to the components.
How does a transformer change voltage levels?
✔✔A transformer uses electromagnetic induction to either step up or step down the voltage level
while maintaining the same power level.
1
,Why is it important to properly size electrical wires for a circuit?
✔✔Correct wire sizing ensures safe current flow, preventing overheating and reducing the risk
of electrical fires.
What is the primary role of a relay in an electrical system?
✔✔A relay acts as an electrically operated switch, allowing a low-power signal to control a high-
power circuit.
How do resistors control the flow of electricity in a circuit?
✔✔Resistors limit the flow of electrical current by providing resistance, which helps control and
distribute the power in the circuit.
What is the difference between alternating current (AC) and direct current (DC)?
✔✔AC flows in both directions, while DC flows in only one direction, with AC being used for
most power distribution systems and DC used in batteries.
Why are circuit diagrams important in electrical work?
✔✔Circuit diagrams provide a visual representation of the electrical system, helping technicians
understand the layout and troubleshoot problems.
2
,What is the function of a capacitor in an electrical system?
✔✔A capacitor stores electrical energy temporarily and can release it when needed to smooth
out voltage fluctuations.
What safety measures should be taken before working with electrical systems?
✔✔Before working on electrical systems, ensure the power is turned off, use insulated tools, and
wear proper personal protective equipment (PPE).
How does a grounding electrode system function?
✔✔A grounding electrode system connects electrical equipment to the earth, providing a path for
electrical faults to safely dissipate into the ground.
What is the significance of the National Electrical Code (NEC)?
✔✔The NEC provides guidelines for safe electrical system installations and helps ensure
electrical safety and code compliance.
Why is circuit protection essential in electrical systems?
3
, ✔✔Circuit protection prevents damage to components and reduces the risk of electrical fires by
stopping excess current from flowing through the system.
What is a short circuit, and why is it dangerous?
✔✔A short circuit occurs when electricity flows through an unintended path with very low
resistance, which can cause overheating, sparks, or fires.
How does an electrical meter measure power consumption?
✔✔An electrical meter measures the amount of electrical energy used by a system or appliance,
usually in kilowatt-hours (kWh).
What is the purpose of a switch in a circuit?
✔✔A switch controls the flow of electricity by either opening or closing the circuit, turning the
power on or off.
Why should electrical connections be securely tightened?
✔✔Loose connections can cause resistance, overheating, and potentially lead to fire hazards,
making secure connections critical for safety.
4
Answers Graded A+
Why is it important to properly ground electrical equipment?
✔✔Proper grounding prevents electrical shock hazards by providing a safe path for electricity to
follow in case of a fault.
What does the term "overcurrent" mean in electrical circuits?
✔✔Overcurrent refers to a situation where the current flowing through a circuit exceeds its safe
capacity, potentially causing damage or fire.
What is the function of a fuse in an electrical system?
✔✔A fuse protects electrical circuits by breaking the circuit if the current exceeds a specified
limit, preventing damage to the components.
How does a transformer change voltage levels?
✔✔A transformer uses electromagnetic induction to either step up or step down the voltage level
while maintaining the same power level.
1
,Why is it important to properly size electrical wires for a circuit?
✔✔Correct wire sizing ensures safe current flow, preventing overheating and reducing the risk
of electrical fires.
What is the primary role of a relay in an electrical system?
✔✔A relay acts as an electrically operated switch, allowing a low-power signal to control a high-
power circuit.
How do resistors control the flow of electricity in a circuit?
✔✔Resistors limit the flow of electrical current by providing resistance, which helps control and
distribute the power in the circuit.
What is the difference between alternating current (AC) and direct current (DC)?
✔✔AC flows in both directions, while DC flows in only one direction, with AC being used for
most power distribution systems and DC used in batteries.
Why are circuit diagrams important in electrical work?
✔✔Circuit diagrams provide a visual representation of the electrical system, helping technicians
understand the layout and troubleshoot problems.
2
,What is the function of a capacitor in an electrical system?
✔✔A capacitor stores electrical energy temporarily and can release it when needed to smooth
out voltage fluctuations.
What safety measures should be taken before working with electrical systems?
✔✔Before working on electrical systems, ensure the power is turned off, use insulated tools, and
wear proper personal protective equipment (PPE).
How does a grounding electrode system function?
✔✔A grounding electrode system connects electrical equipment to the earth, providing a path for
electrical faults to safely dissipate into the ground.
What is the significance of the National Electrical Code (NEC)?
✔✔The NEC provides guidelines for safe electrical system installations and helps ensure
electrical safety and code compliance.
Why is circuit protection essential in electrical systems?
3
, ✔✔Circuit protection prevents damage to components and reduces the risk of electrical fires by
stopping excess current from flowing through the system.
What is a short circuit, and why is it dangerous?
✔✔A short circuit occurs when electricity flows through an unintended path with very low
resistance, which can cause overheating, sparks, or fires.
How does an electrical meter measure power consumption?
✔✔An electrical meter measures the amount of electrical energy used by a system or appliance,
usually in kilowatt-hours (kWh).
What is the purpose of a switch in a circuit?
✔✔A switch controls the flow of electricity by either opening or closing the circuit, turning the
power on or off.
Why should electrical connections be securely tightened?
✔✔Loose connections can cause resistance, overheating, and potentially lead to fire hazards,
making secure connections critical for safety.
4
