Elevator Mechanic Practice Exam

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Prepare for the Elevator Mechanic Exam with comprehensive quizzes, flashcards, and multiple-choice questions. Each question includes hints and detailed explanations to ensure you are ready for your exam!

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A hydro runs up with no load, but will not run with a full load. What is the issue?

The control valve is clogged
The oil level is too low
The pump is undersized
The relief valve is set too low

The correct answer is: The control valve is clogged

A hydro that can run with no load but not with a full load would indicate that there may be a blockage in the control valve. The other options (B, C, and D) would cause the hydro to not run at all, rather than just not being able to handle a full load. If the oil level is too low, it would not be able to maintain pressure and the hydro would not be able to run at all. If the pump is undersized, it would not be able to generate enough pressure to run the hydro, and if the relief valve is set too low, it would constantly release pressure and the hydro would not be able to build up enough pressure to run. Only a blockage in the control valve would allow the hydro to run with no load, but not with a full load.