ExxonMobil Test ExxonMobil Sample 5 — Questions and Answers
Question 1: A compressor increases gas pressure from 14.7 psia to 88.2 psia. What is the compression ratio?
- 6:1 (Correct answer)
- 4:1
- 3:1
- 8:1
Correct answer: 6:1
Compression ratio = 88.2 ÷ 14.7 = 6.
Question 2: Which of the following BEST defines 'inherent safety' in process design?
- Eliminating hazards by design rather than controlling them with add-on safety systems (Correct answer)
- Installing more alarms and shutdown systems to manage existing hazards
- Training employees to respond faster to process upsets
- Using personal protective equipment as the primary risk control
Correct answer: Eliminating hazards by design rather than controlling them with add-on safety systems
Inherent safety removes the hazard at the source through design choices, making it the most robust risk reduction method.
Question 3: If the price of natural gas is $3.20 per MMBtu and a plant uses 2,500 MMBtu per day, what is the weekly fuel cost?
- $56,000 (Correct answer)
- $48,000
- $44,800
- $64,000
Correct answer: $56,000
Daily cost = 3.20 × 2,500 = $8,000; weekly = 8,000 × 7 = $56,000.
Question 4: A passage states: 'Carbon capture technologies can reduce CO₂ emissions from industrial processes by up to 90%.' Which conclusion is MOST supported?
- Carbon capture is one of the more effective tools available for industrial emissions reduction. (Correct answer)
- Carbon capture will eliminate all industrial CO₂ emissions.
- All industries currently use carbon capture technology.
- Emissions reduction without carbon capture is impossible.
Correct answer: Carbon capture is one of the more effective tools available for industrial emissions reduction.
'Up to 90%' reduction makes carbon capture a highly effective tool, but the passage does not claim it is universal or complete.
Question 5: A belt drive connects a motor pulley (diameter 10 in) to a driven pulley (diameter 25 in). If the motor runs at 1,500 RPM, what is the speed of the driven pulley?
- 600 RPM (Correct answer)
- 750 RPM
- 375 RPM
- 900 RPM
Correct answer: 600 RPM
Speed ratio is inverse to pulley diameter ratio: 1,500 × (10/25) = 600 RPM.
Question 6: You are asked to complete an urgent report but realize you are missing key data from another department. Your deadline is in 2 hours. What is the BEST course of action?
- Contact the other department immediately, explain the urgency, and notify your manager of the data gap (Correct answer)
- Submit the report with estimates and correct it later without informing your manager
- Miss the deadline and wait until all data is available before submitting
- Complete only the sections you have data for and submit without flagging the missing sections
Correct answer: Contact the other department immediately, explain the urgency, and notify your manager of the data gap
Proactively communicating the gap and seeking data quickly is both efficient and transparent.
Question 7: An electrical circuit has a voltage of 240V and a resistance of 60 ohms. Using Ohm's Law, what is the current flowing through the circuit?
- 4 amperes (Correct answer)
- 6 amperes
- 3 amperes
- 8 amperes
Correct answer: 4 amperes
I = V ÷ R = 240 ÷ 60 = 4 amperes.
ExxonMobil Test ExxonMobil Sample 5
A compressor increases gas pressure from 14.7 psia to 88.2 psia.
What is the compression ratio?