Plant Operator Selection System Test Cheat Sheet 2026

The 30 highest-yield Plant Operator Selection System Test facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. 2 miles equals? yards. → 3520
2. Which of these three pulleys, numbered 1, 2, or 3, rotates the fastest? → three
3. A pressure transmitter has a range of 0-100 psig and a 4-20 mA output. What current signal corresponds to 50 psig? → 12 mA
4. Which of the following statements is untrue in light of the information in the passage? → Static electricity is caused by friction.
5. A valve handle is currently pointing straight up (12 o'clock position). If it is rotated 90 degrees clockwise, where does the handle point? → 3 o'clock position
6. On a Process and Instrumentation Diagram (P&ID), a dashed line connecting an instrument to a control element typically represents: → An electrical or pneumatic signal
7. In process control, 'cascade control' means: → Two controllers where the output of the primary sets the setpoint of the secondary
8. How common is static electricity, according to the passage? → It is very common.
9. An operator faces north and makes a 90-degree turn to the right, then another 90-degree turn to the right. What direction is the operator now facing? → South
10. A wheel with a diameter of 2 feet has a mark painted at the very top. After the wheel rolls forward one full revolution, where is the painted mark? → At the top of the wheel again
11. A level transmitter in a tank reads higher than the actual level. The most likely cause is: → A plugged or blocked impulse line on the low-pressure side
12. When a pressure relief valve activates unexpectedly during normal operations, the operator's FIRST action should be to: → Notify the control room and monitor the pressure reading
13. A Safety Instrumented System (SIS) is designed to: → Automatically bring the process to a safe state when a dangerous condition is detected
14. If Gear A makes one complete clockwise revolution, which of the following statements is true about Gear C? → Gear C will make less than one revolution in a clockwise direction.
15. Which of the following figures is the 'odd one out' and does not belong with the others based on a logical pattern? → A large hexagon containing four small circles.
16. An operator needs to solve for X in the equation: 3(X + 4) = 21. What is the value of X? → 3
17. What does the entire passage revolve around? → Educate people about static electricity.
18. The passage's final paragraph focuses mostly on: → Describing ways to prevent being zapped by static electricity.
19. Which of the following is a classic example of a Class 2 lever? → A wheelbarrow
20. According to Ohm's Law, if the voltage across a purely resistive heating element is doubled, what is the effect on the current flowing through it? → The current is doubled.
21. A Safety Data Sheet (SDS) Section 8 provides information on: → Exposure controls and personal protective equipment
22. Dead band in a control instrument refers to: → The range over which input changes cause no output response
23. The IDLH (Immediately Dangerous to Life or Health) concentration for a gas is the level at which: → A worker could not escape without severe health effects
24. OSHA's Process Safety Management (PSM) standard applies to facilities that: → Have highly hazardous chemicals above threshold quantities
25. Which class of fire extinguisher is correct for an electrical equipment fire? → Class C
26. Control valve hysteresis is best described as: → The difference in valve position between increasing and decreasing signal strokes
27. What is the purpose of an interlock in a process plant? → To automatically prevent or stop an operation when an unsafe condition is detected
28. What does a differential pressure (DP) transmitter measure when installed across an orifice plate? → Flow rate based on the pressure drop across the restriction
29. 725 gallons equals? port pipes. → 10
30. In a PID controller, the 'I' (integral) term is used to: → Eliminate steady-state offset by accumulating past error over time