Practice Test Geeks(CET) Certified Elevator Technician Practice Test
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Hydraulic Elevator Systems Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Hydraulic Elevator Systems flashcards as text

  1. What is the primary purpose of a hydraulic elevator's lowering valve?

    Answer: To control the rate of fluid return to the tank during down travel

    The lowering valve meters fluid flow back to the reservoir, controlling descent speed.

  2. A hydraulic elevator experiences 'rough ride' during up travel only. The MOST likely cause is:

    Answer: A worn pump coupling

    A worn or damaged pump coupling causes vibration and rough ride specifically during the up direction when the pump is driving the load.

  3. What does the term 'telescoping cylinder' refer to in hydraulic elevator design?

    Answer: A multi-stage cylinder where inner sections extend sequentially for greater travel

    A telescoping cylinder uses nested stages that extend sequentially, allowing longer travel than a single-stage cylinder of the same retracted length.

  4. According to ASME A17.1, the maximum pressure above which a hydraulic elevator relief valve must open is:

    Answer: 125% of working pressure

    ASME A17.1 requires the relief valve to open at no more than 125% of the system working pressure to protect against overpressure.

  5. In a roped hydraulic elevator, what is the mechanical advantage provided by a 2:1 roping ratio?

    Answer: The car travels twice as far as the cylinder stroke

    A 2:1 roping ratio means the car travels twice the distance of the cylinder stroke, allowing shorter cylinders for taller rises.

  6. What type of hydraulic fluid is recommended for environmentally sensitive installations?

    Answer: Biodegradable vegetable-based or synthetic ester fluid

    Biodegradable vegetable-based or synthetic ester fluids are used in environmentally sensitive areas because they break down naturally if spilled.

  7. A hydraulic elevator pit has an accumulation of hydraulic oil. The FIRST corrective action should be:

    Answer: Identify and repair the source of the leak before resuming service

    The source of the leak must be found and repaired before returning the elevator to service to prevent continued fluid loss and potential fire hazard.