NEIEP Mechanics Practice Exam

What is the first troubleshooting step if a hydraulic elevator will not run down?

1. Check the power supply

2. Inspect the control panel

3. See if it will run down by opening the manual lowering valve

4. Check for blockages in the hydraulic line

The correct answer is: See if it will run down by opening the manual lowering valve

The first troubleshooting step if a hydraulic elevator will not run down is to see if it will run down by opening the manual lowering valve. This step is crucial because it helps to determine if the issue is related to the electrical or control systems or if there is a problem with the hydraulic system itself. By manually lowering the elevator, you can ascertain if the hydraulic system has sufficient pressure to move the elevator down or if there is some blockage or malfunction preventing the descent. This direct action provides immediate feedback on the elevator's operational status, making it an effective first step in diagnosing the problem. Checking the power supply is important, but it’s often more effective to verify immediate mechanical functions first. Inspecting the control panel could also provide insights, but those systems might be dependent on the hydraulic function itself. Checking for blockages in the hydraulic line is a valid concern but typically comes after initial functional tests have been performed. Prioritizing direct interaction with the manual lowering mechanism allows for a more efficient troubleshooting process.