PO Safety & Hazard Management 1

Question 1

What is the primary purpose of a Job Hazard Analysis (JHA) in process operations?

Accepted Answer

To identify and control hazards before a task begins

Answer

A JHA systematically identifies potential hazards associated with each step of a job so that controls can be put in place before work begins.

Question 2

Which type of fire extinguisher is appropriate for a Class B fire involving flammable liquids?

Accepted Answer

Class B or BC dry chemical extinguisher

Answer

Class B fires involve flammable liquids and are best suppressed using dry chemical or CO2 extinguishers rated for Class B.

Question 3

When must a process operator don a Self-Contained Breathing Apparatus (SCBA)?

Accepted Answer

When entering an atmosphere that is or may be IDLH

Answer

SCBA must be used when the atmosphere is Immediately Dangerous to Life or Health (IDLH) or when oxygen deficiency is possible.

Question 4

What does the term 'hierarchy of controls' mean in industrial safety?

Accepted Answer

A ranked framework for controlling hazards from most to least effective

Answer

The hierarchy of controls ranks hazard control methods from elimination (most effective) down to PPE (least effective) to guide safety decisions.

Question 5

A process operator notices a strong odor of H2S in the unit. What is the correct FIRST action?

Accepted Answer

Don appropriate respiratory protection and activate the alarm

Answer

H2S is immediately dangerous; the operator must don respiratory protection and activate alarms before taking any other action.

PO - Process Operator Certification Practice Test