NEIEP Mechanics Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the NEIEP Mechanics Exam with multiple choice questions, hints, and detailed explanations. Ace your test and advance your career!

Practice this question and more.

Why must you place a hydraulic elevator car on jack posts before servicing the packing head?

To prevent oil leakage
To distribute weight evenly
Because the elevator is supported by a column of oil
To allow for easy access to the pump

The correct answer is: Because the elevator is supported by a column of oil

Placing a hydraulic elevator car on jack posts before servicing the packing head is essential because the elevator relies on hydraulic fluid to support the weight of the car. When the car is positioned above the jack, it is held in place by a column of hydraulic oil that creates pressure, enabling it to lift and lower. If servicing is carried out without first placing the car on jack posts, there is a risk that the hydraulic fluid could drain, rendering the system inoperative and potentially causing the car to fall if the oil level drops too low. This scenario poses significant safety risks to maintenance personnel and could lead to damage to the elevator system. By using jack posts, the weight is securely supported, ensuring the elevator remains in a safe and stable position during maintenance.