Tank Filling & Pump Operations Work Demo Practice Guide

🚨 THINK YOU’RE READY FOR A PROCESS OPERATOR WORK DEMO?

You may know the basics of pumps, valves, levels, and flow — but can you apply that knowledge under pressure?

This study guide is designed for applicants preparing for tank filling, pump operations, mechanical aptitude, and process operator work demo-style assessments.

Inside this guide you’ll get:

• 40 practice questions
• 6 illustrated operating scenarios
• Worked answers and explanations
• Mechanical aptitude + flow/level practice
• Independent preparation for process operator applicants
• 
  

Try These 3 Challenging Sample Questions

Sample Question 1

A 1,200-gallon tank currently contains 450 gallons. A pump transfers liquid into the tank at 35 gpm. After 10 minutes, a second pump starts and removes liquid from the tank at 12 gpm while the first pump continues running. Assuming both pumps continue operating, how many total minutes from the start will it take for the tank to reach 900 gallons?

Answer: 14.35 minutes

Explanation:

First 10 minutes:

35 gpm × 10 = 350 gallons added

450 + 350 = 800 gallons

To reach 900 gallons, the tank needs 100 more gallons.

After the second pump starts, net flow = 35 − 12 = 23 gpm

100 ÷ 23 = 4.35 minutes

Total time = 10 + 4.35 = 14.35 minutes

Sample Question 2

A transfer line sends product from Tank A to Tank B. The pump is running, suction valve is open, discharge valve is open, and Tank B level is not increasing. The discharge pressure is lower than normal and vibration has increased. Which condition is the most likely cause?

A. Tank B is filling too quickly

B. The pump may be losing suction or cavitating

C. The discharge valve is fully closed

D. Tank A level is rising too slowly

Answer: B. The pump may be losing suction or cavitating

Explanation:

Low discharge pressure and increased vibration are common warning signs of poor suction conditions or cavitation. This is exactly the kind of reasoning many work demo and mechanical aptitude assessments expect.

Sample Question 3

A tank level increases from 28% to 64% over 18 minutes at a constant fill rate. If the same fill rate continues, how many more minutes will it take to reach 82%?

Answer: 9 minutes

Explanation:

Level increase so far = 64% − 28% = 36% in 18 minutes

That equals 2% per minute

Needed increase = 82% − 64% = 18%

18% ÷ 2% per minute = 9 minutes

Who This Guide Is For

This guide is for applicants pursuing opportunities in:

• Refineries
• Chemical plants
• Terminals
• Utilities
• Other continuous-process operations

Important Notice

This guide is for independent educational preparation only. It is not affiliated with, endorsed by, or copied from any employer, hiring company, testing vendor, or official work demo assessment.

Purchase License / Copyright Notice

Copyright © 2026 Jeffre Brown / Industrial Career Prep.

This PDF is sold for individual use only.

Your purchase allows:

• Personal study use
• Printing one personal copy

Your purchase does not allow:

• Emailing or forwarding the PDF to others
• Uploading to websites, groups, or shared drives
• Reselling, reposting, reproducing, or redistributing the material
• Sharing with friends, coworkers, classmates, or social media groups

Unauthorized copying or distribution is prohibited.

Prepared by Jeffre Brown

Digital Study Guide