Plant Operator Selection System Test Plant Operator Selection System Reading Comprehension 2 — Questions and Answers
Question 1: Read the following passage and answer the question. "Before starting the pump, the operator must verify that the inlet valve is fully open, the discharge valve is partially open, and the seal water is flowing. Failure to confirm these conditions may result in equipment damage." What must the operator check LAST before starting the pump?
- Inlet valve is fully open
- Discharge valve is partially open
- Seal water is flowing (Correct answer)
- Pressure gauge reads zero
Correct answer: Seal water is flowing
The passage lists three checks in order: inlet valve, discharge valve, then seal water — seal water is the last item listed.
Question 2: Read the following safety notice and answer the question. "Lockout/tagout procedures MUST be followed whenever maintenance is performed on electrical equipment. No exceptions are permitted. Workers who bypass these procedures are subject to immediate termination." Which statement is best supported by this notice?
- Lockout/tagout applies only to high-voltage equipment
- Supervisors may grant exceptions to the procedure
- Lockout/tagout compliance is mandatory with no exceptions (Correct answer)
- Workers receive a warning before termination for violations
Correct answer: Lockout/tagout compliance is mandatory with no exceptions
The notice explicitly states 'No exceptions are permitted,' making compliance unconditionally mandatory.
Question 3: Read the following passage and answer the question. "The cooling tower operates most efficiently when water temperature entering the tower does not exceed 95°F. When inlet water temperature rises above this threshold, fan speed should be increased incrementally until the temperature returns to the acceptable range." According to the passage, what should an operator do when inlet water temperature is 98°F?
- Shut down the cooling tower immediately
- Decrease fan speed gradually
- Increase fan speed incrementally (Correct answer)
- Replace the cooling tower water
Correct answer: Increase fan speed incrementally
The passage states that when temperature exceeds 95°F, fan speed should be increased incrementally to restore acceptable range.
Question 4: Read the following procedure excerpt and answer the question. "Step 1: Don personal protective equipment. Step 2: Isolate the chemical feed line. Step 3: Open the drain valve. Step 4: Collect a sample in a clean container. Step 5: Close the drain valve and restore the line." What happens immediately AFTER the drain valve is opened?
- Personal protective equipment is donned
- The chemical feed line is isolated
- A sample is collected in a clean container (Correct answer)
- The drain valve is closed and the line is restored
Correct answer: A sample is collected in a clean container
Step 4 — collecting a sample — immediately follows Step 3, which is opening the drain valve.
Question 5: Read the following passage and answer the question. "Boiler feedwater quality must be monitored continuously. High dissolved oxygen content accelerates corrosion of boiler tubes, while excessively low pH causes acid attack on metal surfaces. Both conditions shorten equipment lifespan significantly." According to the passage, which TWO factors are harmful to boiler tubes?
- High temperature and low pressure
- High dissolved oxygen and low pH (Correct answer)
- Low dissolved oxygen and high pH
- High pressure and high temperature
Correct answer: High dissolved oxygen and low pH
The passage specifically identifies high dissolved oxygen (causing corrosion) and low pH (causing acid attack) as harmful to boiler equipment.
Question 6: Read the following warning label and answer the question. "WARNING: This chemical is corrosive. Avoid skin and eye contact. In case of skin contact, flush with water for 15 minutes. In case of eye contact, flush with water for 20 minutes and seek immediate medical attention." For how long should water flushing continue after eye contact with this chemical?
- 5 minutes
- 10 minutes
- 15 minutes
- 20 minutes (Correct answer)
Correct answer: 20 minutes
The label specifies 20 minutes of flushing for eye contact, which is longer than the 15 minutes specified for skin contact.
Question 7: Read the following passage and answer the question. "Natural gas detectors in the compressor building are set to alarm at 10% of the lower explosive limit (LEL). This early warning allows personnel time to identify the leak source and take corrective action before concentrations reach dangerous levels." What is the PRIMARY purpose of setting the alarm at 10% LEL rather than at a higher concentration?
- To conserve detector battery life
- To give personnel early warning and time to respond (Correct answer)
- To comply with insurance requirements
- To prevent false alarms from normal operations
Correct answer: To give personnel early warning and time to respond
The passage states the 10% LEL threshold 'allows personnel time to identify the leak source and take corrective action' — an early warning purpose.
Plant Operator Selection System Test Plant Operator Selection System Reading Comprehension 2
Read the following passage and answer the question.
"Before starting the pump, the operator must verify that the inlet valve is fully open, the discharge valve is partially open, and the seal water is flowing.
Failure to confirm these conditions may result in equipment damage."
What must the operator check LAST before starting the pump?