NEIEP Mechanics Practice Exam

What type of safety uses an oil buffer between the car and safety planks?

1. Type A

2. Type B

3. Type C

4. Type D

The correct answer is: Type C

The use of an oil buffer between the car and safety planks is characteristic of Type C safety systems. This design incorporates a hydraulic or oil-filled buffer which acts as a shock absorber when the elevator car or system experiences an unexpected drop or impact. This method effectively dampens the force of a fall, thereby enhancing safety for the passengers and minimizing wear on the elevator components. Oil buffers are particularly valued for their ability to absorb energy gradually, making them suitable for situations where sudden stops due to failure could otherwise lead to severe accidents. In contrast, other types of safety systems might rely on mechanical devices or springs, which do not utilize the damping quality of oil to the same extent, potentially leading to more abrupt stops. Understanding this distinction highlights the importance of design choices in elevator safety mechanisms.