Gas Fitter Practice Test

If the fan compartment door of an appliance is left off, what will most likely happen to the motor?

1. Voltage will decrease

2. Voltage will increase

3. Current will decrease

4. Current will increase

The correct answer is: Current will increase

When the fan compartment door of an appliance is left off, the motor is likely to experience an increase in current. This occurs because the fan compartment is designed to maintain proper airflow and cooling for the motor. Without the door, the motor may operate less efficiently, leading to an increase in resistance in the electrical components. As the motor works harder to perform its function, the increased workload demands more current to deliver the necessary power. Moreover, impaired airflow can cause the motor to overheat, further increasing its resistance and causing it to draw more current in an effort to maintain operational capacity. This condition can potentially lead to overheating and even motor failure if not addressed. Therefore, the situation emphasizes the importance of enclosing fan compartments properly to ensure they function as intended, promoting efficient operation and safeguarding the components from undue stress.