ExxonMobil Test ExxonMobil Problem Solving

Question 1

A pump's flow rate has dropped 20% below target. Which diagnostic step should be performed FIRST?

Accepted Answer

Check the suction line for blockages or low inlet pressure

Answer

Checking the suction side for blockages or low inlet pressure is the correct first step, as these are common causes of reduced pump flow.

Question 2

A technician finds that a temperature gauge reads 15°C higher than the adjacent thermocouple. What is the most likely cause?

Accepted Answer

One of the instruments is faulty or needs calibration

Answer

A significant discrepancy between two instruments measuring the same point most likely indicates one instrument is faulty or out of calibration.

Question 3

During a routine inspection, you notice corrosion forming at a pipe flange. What is the correct initial action?

Accepted Answer

Document the finding and report it to the inspection engineer immediately

Answer

Documenting and reporting to the inspection engineer allows a qualified professional to assess the severity and determine the appropriate corrective action.

Question 4

A batch of refined product fails quality testing for sulfur content. Which process unit would most likely be the root cause?

Accepted Answer

Hydrotreater

Answer

The hydrotreater is responsible for sulfur removal; if it malfunctions or catalyst is depleted, product sulfur content will exceed specifications.

Question 5

An operator notices an unexpected pressure drop in a section of pipeline. Which action should be taken FIRST?

Accepted Answer

Check for potential leaks, blocked instruments, or valve position changes in that section

Answer

An unexpected pressure drop must first be investigated by checking for leaks, instrument faults, or valve changes before any corrective action.

ExxonMobil Test Practice Test

ExxonMobil Test Practice Test

ExxonMobil Test ExxonMobil Problem Solving