Recreational Vehicle (RV) Technician Practice Test

What happens when two adjacent conductors make electrical contact and bypass part of a circuit?

1. A short circuit occurs

2. An open circuit is created

3. A surge of current flows

4. A ground fault happens

The correct answer is: A short circuit occurs

When two adjacent conductors make electrical contact and bypass part of a circuit, a short circuit occurs. This condition results when the electrical current flows through an unintended path with little to no resistance. In essence, the electricity effectively "short-circuits" the intended route of current flow, which can lead to excessive current that potentially damages components, raises temperatures, or even causes fires. In a short circuit, the current can increase dramatically, leading to circuits being overloaded and protective devices, such as fuses or circuit breakers, being triggered. This is essential to prevent further damage to the electrical system. The other scenarios reflect different electrical issues. An open circuit is created when there is a break in the path through which electricity flows, preventing current from circulating. A surge of current indicates a sudden increase in current flow that can occur due to various reasons, but it doesn't specifically result from two conductors making contact. A ground fault occurs when a live conductor comes into contact with a grounded surface, creating a safety hazard that can lead to shock or fire. Understanding these distinctions is crucial for effectively diagnosing and addressing electrical issues in recreational vehicles.