What tool can be utilized for checking the vertical alignment of elevator components?

The plumb bob is an effective tool for checking the vertical alignment of elevator components because it utilizes gravity to establish a true vertical reference. When suspended from a fixed point, the plumb bob will point directly downward, allowing technicians to determine whether various elevator parts—such as rails or sheaves—are properly aligned vertically. This precision is crucial for maintaining the safety and smooth operation of the elevator system.

While a spirit level can also be used to check for level surfaces and vertical alignment, it relies on a bubble in a vial and may not be as precise for vertical applications as the plumb bob. Calipers measure dimensions rather than alignment, and a torque wrench is primarily used to apply a specific amount of torque to fasteners, not for alignment purposes. Thus, the plumb bob stands out as the most appropriate tool for ensuring vertical alignment in elevator components.