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100+ Free MS Fueling Systems Practice Questions

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2026 Statistics

Key Facts: MS Fueling Systems Exam

70%

Passing Score

PSI MS Contractor Bulletin 4/23/2026

50 Q

Official Exam Questions

PSI MS Contractor Bulletin 4/23/2026

2 hours

Time Allowed

PSI MS Contractor Bulletin 4/23/2026

$120

PSI Exam Fee

PSI MS Contractor Bulletin 4/23/2026

Open book

Exam Format

PSI MS Contractor Bulletin 4/23/2026

MS Fueling Systems PSI trade exam: 50 questions, 70% pass, 2 hours, fee $120. Open-book MSBOC classification (bulletin 4/23/2026).

Sample MS Fueling Systems Practice Questions

Try these sample questions to test your MS Fueling Systems exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under OSHA 29 CFR 1926 Subpart P, when must a trench generally have a protective system such as sloping, shoring, or shielding?
A.When the trench is 4 ft or deeper in any soil
B.When the trench is 5 ft or deeper, unless entirely in stable rock
C.Only when the trench is 10 ft or deeper
D.Only when groundwater is present
Explanation: OSHA requires protective systems for excavations 5 ft or deeper unless the excavation is entirely in stable rock. Shallower excavations still need protection if a competent person finds a cave-in hazard. Fueling-system tank and product-line work commonly exceeds this depth, so protective-system planning is a core excavation duty.
2In a trench 4 ft or more deep, OSHA requires a stairway, ladder, ramp, or other safe means of egress so that no worker must travel more than what lateral distance to exit?
A.10 ft
B.15 ft
C.25 ft
D.50 ft
Explanation: OSHA 1926.651 requires a safe means of egress in trenches 4 ft or deeper so that no employee travels more than 25 ft laterally to a ladder, stairway, or ramp. Incorrect ladder spacing is a common citation on tank and product-line jobs.
3Unless a retaining device is used, OSHA requires excavated spoil and other materials to be kept at least how far from the edge of an excavation?
A.1 ft
B.2 ft
C.4 ft
D.6 ft
Explanation: Spoil, equipment, and materials must be kept at least 2 ft from the excavation edge or retained so they cannot fall or roll into the hole. Spoil on the lip loads the trench wall and can cause collapse or bury workers.
4Who must inspect excavations, adjacent areas, and protective systems daily before workers enter, and after events that could increase hazards?
A.Any crew member wearing a hard hat
B.The equipment operator only
C.A competent person
D.Only a registered professional engineer
Explanation: OSHA assigns excavation inspections to a competent person—someone who can identify existing and predictable hazards and has authority to correct them. Inspections are required daily and after rainstorms, vibration, or other events that can increase cave-in risk.
5Before excavating for underground tanks or product lines in Mississippi, what is the primary purpose of contacting Mississippi 811?
A.To obtain the MSBOC contractor license
B.To request marking of underground utilities so they can be located and protected
C.To schedule the tank tightness test with the fire marshal
D.To register the contractor's PEI certification
Explanation: Mississippi law requires excavators to notify MS811 so member operators can locate and mark underground facilities. Striking gas, electric, telecom, or existing product lines during tank work is a major safety and liability risk.
6Except for allowed emergency work, Mississippi excavators must give MS811 how much advance notice before beginning excavation?
A.Same-day notice is always sufficient
B.Not less than 3 and not more than 10 working days
C.Exactly 30 calendar days
D.Notice is required only if the excavation is deeper than 20 ft
Explanation: Mississippi Dig Law requires written, electronic, or telephone notice to MS811 not less than 3 and not more than 10 working days before excavation so operators can mark facilities. Starting before marks are in place, or working on an expired ticket, violates the law.
7OSHA soil classification for selecting sloping and shoring groups materials primarily as:
A.Class I, II, and III liquids only
B.Stable rock, Type A, Type B, and Type C soils
C.Sand, gravel, and concrete only
D.Wet soil and dry soil only
Explanation: OSHA Subpart P classifies materials as stable rock and Types A, B, and C soils based on unconfined compressive strength and other characteristics. Slope angles and shoring choices depend on this classification by a competent person.
8Which OSHA soil type is generally the least stable and requires the flattest maximum allowable simple slope for excavations 20 ft or less deep?
A.Type A
B.Type B
C.Type C
D.Stable rock
Explanation: Type C soil is the least cohesive of the OSHA soil types commonly encountered and requires the flattest simple slope, 1½ horizontal to 1 vertical (about 34 degrees). Many sandy or submerged soils classify as Type C.
9For simple sloping of excavations 20 ft or less deep, what is the OSHA maximum allowable slope in Type B soil?
A.Vertical (90 degrees)
B.3/4 horizontal to 1 vertical
C.1 horizontal to 1 vertical
D.1½ horizontal to 1 vertical
Explanation: OSHA Appendix B allows a maximum simple slope of 1H:1V (45 degrees) in Type B soil for excavations 20 ft or less deep. Steeper slopes require another protective-system option or an engineered design.
10At what excavation depth does OSHA require sloping, benching, or other protective systems to be designed by a registered professional engineer, or based on tabulated data prepared or approved by an RPE?
A.4 ft
B.5 ft
C.10 ft
D.More than 20 ft
Explanation: OSHA Appendix B sloping and benching configurations apply to excavations 20 ft or less deep. Deeper excavations require a registered professional engineer's design or RPE-approved tabulated data. Deep tank holes in high-water Mississippi soils often need this engineering attention.

About the MS Fueling Systems Exam

Mississippi Fueling Systems Contractor Examination is a classification trade examination administered by PSI for the Mississippi State Board of Contractors. The official open-book exam has 50 questions, a 70% passing standard, and 2 hours allowed. PSI examination fee is $120 per portion (bulletin updated 4/23/2026). This English-language MCQ bank is a study aid for the official content outline; it is not an official PSI form, does not replace the required Law and Business Management exam, and is not a substitute for MSBOC application review or the official open-book examination.

Questions

50 scored questions

Time Limit

2 hours

Passing Score

70%

Exam Fee

$120 (PSI Services LLC (for Mississippi State Board of Contractors))

MS Fueling Systems Exam Content Outline

32%

Excavation

Tank excavation and site work

28%

Tank Installation and Testing

UST/AST installation and tightness testing

10%

Piping, Pumps, and Controls

Fuel piping, pumps, and controls

8%

Troubleshooting and Maintenance

System troubleshooting and maintenance

16%

Safety and Fire Prevention

Flammable liquids and fire prevention

6%

Leak Detection and Monitoring Systems

Leak detection and vapor recovery

How to Pass the MS Fueling Systems Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 50 questions
  • Time limit: 2 hours
  • Exam fee: $120

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

MS Fueling Systems Study Tips from Top Performers

1Study only the approved references listed for this classification in the current PSI Mississippi Contractor bulletin (updated 4/23/2026)
2Practice open-book navigation with permanent tabs and indexes before test day
3Drill OSHA 29 CFR 1926 topics that appear across nearly every trade outline
4Confirm MSBOC classification scope and eligibility at msboc.us before scheduling with PSI
5All applicants must also pass Law and Business Management unless it is waived

Frequently Asked Questions

How many questions are on the MS Fueling Systems exam?

The official PSI examination has 50 scored questions (plus possible unscored experimental items). Passing is 70% within 2 hours.

How much does the MS Fueling Systems exam cost?

PSI lists $120 per examination portion (Candidate Information Bulletin updated 4/23/2026). MSBOC application fees are separate: $400 commercial or $50 residential. Additional classifications are $100 each.

Is the Mississippi contractor exam open book?

Yes. PSI administers MSBOC classification exams as open book. Only bulletin-listed approved references are allowed; temporary tabs such as Post-it notes are prohibited.

Do I still need the Law and Business Management exam?

Yes. MSBOC requires the Mississippi Law and Business Management exam (50 questions, 70%, 2 hours) of all applicants. Reciprocity may waive a trade exam in some cases but does not waive Law and Business.