BOC Quality Inspection 5

Question 1

What is the main goal of a root cause analysis after a repeated equipment failure?

Accepted Answer

To find the underlying cause so the failure does not happen again

Answer

Root cause analysis looks past the symptoms to the underlying cause, so corrective action prevents the failure from coming back.

Question 2

How is predictive maintenance different from preventive maintenance?

Accepted Answer

Predictive maintenance uses condition monitoring data to schedule work when it is needed

Answer

Predictive maintenance uses measurements such as vibration, thermography, and oil analysis to act on actual equipment condition, not elapsed time.

Question 3

Before closing a work order, what should a quality inspection confirm?

Accepted Answer

The work is complete, the equipment runs correctly, and the details are documented

Answer

Closeout should confirm the repair fixed the problem, the system runs normally, and the work history is recorded.

Question 4

What is the correct way to verify the accuracy of a BAS space temperature sensor?

Accepted Answer

Compare its reading with a calibrated reference instrument at the same location

Answer

Calibration means comparing the sensor with a traceable reference instrument placed at the same point and correcting any offset.

Question 5

An operator reviews BAS trend logs and sees the heating valve and cooling valve open at the same time on one air handler. What does this show?

Accepted Answer

Simultaneous heating and cooling, which wastes energy

Answer

Unless the system is designed for reheat dehumidification, heating and cooling at the same time is a control fault that wastes energy.

BOC - Building Operator Certification Practice Test