A __________ is a mechanism that attaches to a vertical pole and can be pumped up and down the pole. It is used to support planks on which workers stand.
A) fabricated frame scaffold
B) portable ladder
C) modular frame scaffold
D) pump jack

Question

Quizplus · Accepted Answer

A pump jack is specifically designed for this purpose, and the other options do not have the same functionality. The fabricated frame scaffold and modular frame scaffold are larger and more complex scaffolding systems used for larger construction projects, while a portable ladder is a standalone hinged ladder used for accessing high areas without support.

A __________ Is a Mechanism That Attaches to a Vertical