Plant Operator Selection System Reading Comprehension Questions and Answers — Questions and Answers
Question 1: Read the following passage and answer the question. "Procedure P-501 outlines the response to a low-level alarm in Tank C. Upon receiving the alarm, the operator must first acknowledge the alarm on the control screen. Second, the operator must dispatch a field operator to visually verify the tank level using the local sight glass. The field operator must then report their findings back to the control room. If the low level is confirmed, the control room operator will start the backup transfer pump, P-10B. Under no circumstances should P-10B be started before visual confirmation is received." An operator in the control room receives a low-level alarm for Tank C. After acknowledging the alarm, what is the immediate next step?
- Start the backup transfer pump, P-10B.
- Wait for a report from the field operator.
- Send a field operator to check the sight glass. (Correct answer)
- Check the alarm history for previous events.
Correct answer: Send a field operator to check the sight glass.
The procedure clearly states the sequence of actions. The passage says, 'Second, the operator must dispatch a field operator to visually verify the tank level using the local sight glass.' This action directly follows acknowledging the alarm.
Question 2: Read the following passage and answer the question. "The primary function of the bearing lubrication system is to reduce friction and dissipate heat from the turbine's main shaft bearings. The system utilizes a synthetic oil, which is cooled by a shell-and-tube heat exchanger. It is critical to monitor the oil's temperature; an alarm will sound if the temperature exceeds 180°F. A sustained high-temperature condition can lead to rapid oil degradation, which compromises its lubricating properties and can result in catastrophic bearing failure. Normal operating temperature for the bearing oil is between 150°F and 165°F." According to the passage, which of the following is the most direct cause of compromised lubrication?
- A malfunctioning heat exchanger.
- Sustained high-temperature conditions. (Correct answer)
- The alarm sounding at 180°F.
- Friction from the main shaft bearings.
Correct answer: Sustained high-temperature conditions.
The passage states, 'A sustained high-temperature condition can lead to rapid oil degradation, which compromises its lubricating properties...' While a malfunctioning heat exchanger could cause high temperatures, the high temperature itself is the most direct cause of the oil degradation mentioned.
Question 3: Read the following passage and answer the question. "Before performing any maintenance on the Model 3 pump, the unit must be fully de-energized and isolated. The first step is to notify the control room supervisor of the intended work. Following notification, the operator must proceed to the motor control center (MCC) and open the main breaker for the pump. A personal lock and tag must be applied to the breaker. Only after the lock and tag are in place may the operator attempt to verify zero energy by trying to start the pump locally." An operator is assigned to replace the mechanical seal on the Model 3 pump. According to the procedure, what is the very first action the operator must take?
- Apply a personal lock and tag to the breaker.
- Open the main breaker at the MCC.
- Attempt to start the pump locally to verify it's off.
- Inform the control room supervisor about the maintenance. (Correct answer)
Correct answer: Inform the control room supervisor about the maintenance.
The passage explicitly states, 'The first step is to notify the control room supervisor of the intended work.' The other actions are subsequent steps in the lockout/tagout process that must happen after this initial notification.
Question 4: Read the following passage and answer the question. "The boiler feed pump (BFP) is protected by a minimum flow recirculation line. This line ensures that a minimum volume of water is always flowing through the pump, even when the main discharge valve is closed. This prevents the pump from overheating due to the energy being added to a static volume of water, a condition known as 'dead-heading'. The recirculation line automatically opens whenever the pump's discharge flow drops below 250 gallons per minute (GPM)." Based on the text, what is the primary purpose of the minimum flow recirculation line?
- To prevent the pump from overheating. (Correct answer)
- To ensure the pump discharge flow never exceeds 250 GPM.
- To increase the pump's discharge pressure.
- To provide a backup flow path in case of a leak.
Correct answer: To prevent the pump from overheating.
The passage clearly explains that the recirculation line 'prevents the pump from overheating' by ensuring a minimum flow, thus avoiding the condition of 'dead-heading'.
Question 5: Read the following passage and answer the question. "WARNING: Hydrogen sulfide (H2S) is a colorless, toxic gas that is heavier than air and may accumulate in low-lying areas. All personnel entering Area B must carry a calibrated personal H2S monitor. The monitor will alarm at 10 parts per million (ppm). If an alarm sounds, personnel must immediately hold their breath and exit the area, moving upwind to a designated safe muster point. Do not attempt to rescue a downed colleague without proper respiratory protection and authorization." Which of the following is identified in the passage as a mandatory requirement for all personnel working in Area B?
- Working in pairs at all times.
- Carrying a functional, calibrated H2S monitor. (Correct answer)
- Receiving special authorization before every entry.
- Having supplied-air respiratory protection immediately available.
Correct answer: Carrying a functional, calibrated H2S monitor.
The passage explicitly states, 'All personnel entering Area B must carry a calibrated personal H2S monitor.' While the other options are good safety practices, this is the one directly mandated for everyone by the text provided.
Question 6: Read the following passage and answer the question. "The plant's water demineralization system uses a two-bed process involving a cation resin and an anion resin. During normal service, raw water flows first through the cation vessel, where minerals like calcium and magnesium are removed. The water then flows to the anion vessel, which removes minerals such as silica and chloride. The effectiveness of the cation resin diminishes over time and must be regenerated. Regeneration is initiated when the outlet water conductivity from the cation vessel exceeds 50 microsiemens." Based on the information in the passage, what is the primary purpose of the anion vessel?
- To remove minerals like calcium and magnesium.
- To act as the first stage in the demineralization process.
- To remove minerals like silica and chloride from the water. (Correct answer)
- To initiate the regeneration process at 50 microsiemens.
Correct answer: To remove minerals like silica and chloride from the water.
The passage states that after water flows through the cation vessel, it 'then flows to the anion vessel, which removes minerals such as silica and chloride.' The other options describe the function of the cation vessel or the overall process.
Plant Operator Selection System Reading Comprehension Questions and Answers
Read the following passage and answer the question.
"Procedure P-501 outlines the response to a low-level alarm in Tank C.
Upon receiving the alarm, the operator must first acknowledge the alarm on the control screen.
Second, the operator must dispatch a field operator to visually verify the tank level using the local sight glass.
The field operator must then report their findings back to the control room.
If the low level is confirmed, the control room operator will start the backup transfer pump, P-10B.
Under no circumstances should P-10B be started before visual confirmation is received."
An operator in the control room receives a low-level alarm for Tank C.
After acknowledging the alarm, what is the immediate next step?