Minnesota Residential Contractor Exam — All Questions

Under OSHA construction standards, at what height above a lower level does fall protection generally become required for workers on a construction site?

• a.2 feet
• b.4 feet
• c.6 feet✓
• d.20 feet

OSHA's construction fall-protection rule (29 CFR 1926.501) generally requires protection — such as guardrails, safety nets, or personal fall-arrest systems — when a worker is exposed to a fall of 6 feet or more to a lower level. (Note the general-industry trigger is 4 feet, but on construction sites the 6-foot rule applies.) Falls are consistently a leading cause of construction fatalities, which is why this threshold is heavily tested and enforced.

According to the hierarchy of controls, which method of protecting workers from a hazard is MOST effective and should be considered first?

• a.Eliminating the hazard entirely✓
• b.Providing personal protective equipment (PPE)
• c.Posting a warning sign
• d.Writing the hazard into a safety manual

The hierarchy of controls ranks protections from most to least effective: elimination, substitution, engineering controls, administrative controls, and finally PPE. Removing the hazard entirely is best because it does not depend on worker behavior or equipment holding up. PPE is the last line of defense — it only reduces exposure and relies on correct, consistent use, so it is the least reliable control on its own.

OSHA requires that a trench or excavation be protected by sloping, shoring, or a protective (trench) box once it reaches what depth?

• a.3 feet
• b.5 feet✓
• c.10 feet
• d.15 feet

Under OSHA's excavation standard (29 CFR 1926.652), a protective system — sloping/benching, shoring, or a trench box (shield) — is generally required for trenches 5 feet deep or greater (unless the excavation is entirely in stable rock). A registered professional engineer must design protection for trenches deeper than 20 feet. Cave-ins are frequently fatal, so a competent person must inspect excavations daily.

Who is responsible for providing a safe workplace and requiring the use of appropriate personal protective equipment on a job site?

• a.Only the individual workers themselves
• b.Only the equipment manufacturer
• c.Only OSHA inspectors
• d.The employer✓

Under the OSH Act's General Duty Clause and OSHA standards, the employer has the primary legal duty to furnish a workplace free from recognized hazards, to assess the job for hazards, and to provide and require appropriate PPE (often at no cost to the employee). Workers must follow safety rules and use provided equipment, but the core obligation to create a safe workplace rests with the employer.

OSHA construction standards are found in which part of Title 29 of the Code of Federal Regulations?

• a.29 CFR Part 1910
• b.29 CFR Part 1904
• c.29 CFR Part 1926✓
• d.29 CFR Part 40

OSHA's safety and health standards for the construction industry are contained in 29 CFR Part 1926. (General industry standards are in Part 1910, and injury recordkeeping requirements are in Part 1904.) Knowing that construction work is governed by Part 1926 helps you locate specific rules — for example, fall protection at 1926.501 and excavations at 1926.651-652.

OSHA requires that a 'competent person' inspect excavations. What defines a competent person under 29 CFR 1926?

• a.Someone able to identify existing and predictable hazards and who has authority to take prompt corrective action✓
• b.Any worker who has been on the job the longest
• c.Only a licensed attorney
• d.Any employee over a certain age

OSHA defines a competent person as one who is capable of identifying existing and predictable hazards in the surroundings or working conditions and who has the authorization to take prompt corrective measures to eliminate them. For excavations (29 CFR 1926.651), a competent person must inspect the trench and protective systems daily and as conditions change. The role requires both knowledge and the authority to act.

Under OSHA's Hazard Communication Standard, what document must be available to workers to inform them about the hazards of a chemical product on site?

• a.A building permit
• b.A certificate of occupancy
• c.A mechanic's lien
• d.A Safety Data Sheet (SDS)✓

The Hazard Communication Standard (29 CFR 1926.59, adopting 1910.1200) requires that hazardous chemicals be labeled and that a Safety Data Sheet (SDS) be readily accessible to workers. The SDS describes the chemical's hazards, safe handling, protective measures, and first-aid and emergency response information. Workers have a 'right to know' the dangers of the materials they handle, and the SDS is the core document delivering that information.

OSHA identifies the 'Fatal Four' hazards responsible for the majority of construction worker deaths. Which of the following is one of them?

• a.Paperwork errors
• b.Falls to a lower level✓
• c.Parking violations
• d.Late material deliveries

OSHA's 'Fatal Four' (sometimes called the Focus Four) are the leading causes of construction fatalities: falls, struck-by incidents, electrocutions, and caught-in/between hazards. Falls are consistently the single largest category, which is why fall protection (29 CFR 1926.501) is so heavily emphasized and enforced. Focusing safety efforts on these four hazard types prevents the greatest share of deaths.

Before workers enter a permit-required confined space (such as a manhole or tank), a critical first step under OSHA is to:

• a.Test the atmosphere for oxygen level and hazardous gases before and during entry✓
• b.Immediately send several workers in without any testing
• c.Fill the space with water to check for leaks
• d.Wait for the space to fill with fresh paint fumes

Permit-required confined spaces can contain oxygen-deficient or toxic/flammable atmospheres that are not obvious. OSHA requires that the atmosphere be tested and monitored — for oxygen content, flammable gases, and toxic substances — before and during entry, along with a permit system, attendant, and rescue plan. Many confined-space deaths occur when would-be rescuers rush in; atmospheric testing and proper procedures prevent these tragedies.

The safety procedure of 'lockout/tagout' is primarily used to:

• a.Lock the job-site tool trailer at night
• b.Tag finished work as ready for inspection
• c.Control hazardous energy so machinery cannot be started while it is being serviced✓
• d.Keep track of which workers have clocked in

Lockout/tagout (LOTO) is the practice of isolating and de-energizing equipment and applying locks and tags so that machinery or electrical systems cannot be accidentally energized or started while a worker is servicing or repairing them. It protects against the sudden release of hazardous energy — electrical, mechanical, hydraulic — that could injure or kill the person working on the equipment. It is a key control against electrocution and caught-in hazards.

A personal fall-arrest system used on a construction site generally consists of which three basic components?

• a.A hard hat, safety glasses, and gloves
• b.A ladder, a scaffold, and a guardrail
• c.A first-aid kit, a fire extinguisher, and a sign
• d.An anchorage, a full-body harness, and a connector such as a lanyard or lifeline✓

A personal fall-arrest system (PFAS) has three essential parts, sometimes remembered as the ABCs: an Anchorage point strong enough to hold the forces of a fall, a full-Body harness worn by the worker, and a Connector such as a shock-absorbing lanyard or self-retracting lifeline linking the harness to the anchor. All three must be present and properly rated; a harness alone provides no protection without a proper anchor and connector.