ExxonMobil Engineering Manager Interview Questions and Answers

A reciprocating compressor uses a piston to compress gas, featuring key components for efficient operation.

• 1. Piston: The core component that compresses the gas by moving back and forth in the cylinder.

• 2. Cylinder: Houses the piston and provides a space for gas compression.

• 3. Crankshaft: Converts rotary motion into linear motion for the piston.

• 4. Valves: Control the intake and exhaust of gas, ensuring proper flow; exam...read more

After a PSV failure, I would analyze the cause, implement corrective actions, and ensure continuous improvement to prevent recurrence.

• Conduct a thorough root cause analysis to identify the underlying issues.

• Implement corrective actions based on the analysis, such as redesigning processes or enhancing training.

• Communicate transparently with stakeholders about the failure and the steps being taken to address it.

• Establish...read more

Transformer loss refers to the energy that is dissipated as heat in a transformer during the process of converting electrical energy from one voltage level to another.

• Transformer loss includes copper loss (I²R loss) in the windings and core loss (eddy current and hysteresis losses) in the transformer core.

• Copper loss occurs due to the resistance of the copper windings, leading to heat generation.

• Core loss is caused by ...read more

The type of relay used in switchyard and line is a protective relay.

• Protective relays are used to detect abnormal conditions in the electrical system and initiate corrective actions.

• Common types of protective relays include overcurrent relays, distance relays, and differential relays.

• These relays help to protect equipment and prevent damage to the electrical system.

• Examples of relay manufacturers include Siemens, ABB,

Pilotwire relay is a device used in electrical systems to detect faults and isolate them to prevent damage.

• Pilotwire relay is a protective relay used in power systems.

• It operates by detecting abnormal conditions such as overcurrent or short circuits.

• Once a fault is detected, the pilotwire relay sends a signal to trip the circuit breaker and isolate the fault.

• It helps in preventing damage to equipment and ensuring safet...read more

Substation capacity can be decided based on load demand, future growth projections, available space, and budget constraints.

• Consider current load demand to determine initial capacity requirements

• Factor in future growth projections to ensure capacity will meet long-term needs

• Evaluate available space for equipment installation and expansion

• Take budget constraints into account when selecting substation capacity

• Consult wit...read more

Oil test for transformers is a diagnostic test to assess the condition of the insulating oil used in transformers.

• Oil test helps in detecting any contamination or degradation of the insulating oil.

• Common oil tests include Dissolved Gas Analysis (DGA), Dielectric Strength Test, and Water Content Test.

• Results of oil tests can indicate potential issues with the transformer, such as overheating or insulation breakdown.

• Regu...read more

The first pole to clear factor of a breaker is the time it takes for the breaker to trip and disconnect the circuit in case of a fault.

• The first pole to clear factor is the time delay of the breaker.

• Shorter time delays indicate faster tripping of the breaker in case of a fault.

• Factors affecting the first pole to clear include the type of fault, current magnitude, and breaker design.

• For example, a high current fault may...read more

I coordinate relay by ensuring clear communication, setting timelines, assigning tasks, and monitoring progress.

• Clear communication with all team members involved

• Setting clear timelines and deadlines for each task

• Assigning specific tasks to team members based on their strengths and expertise

• Regularly monitoring progress and providing support or guidance as needed

LBB Protection stands for Life, Body, and Business Protection. It refers to insurance policies that provide coverage for individuals and businesses in case of unexpected events.

• LBB Protection includes life insurance, health insurance, disability insurance, and business insurance.

• Life insurance provides financial protection to the family in case of the policyholder's death.

• Health insurance covers medical expenses for il...read more