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OSHA 510 practice questions

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Question 1OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Under the OSH Act, which duty is placed directly on each covered employer by the General Duty Clause?

  1. Purchase workers' compensation insurance through a federal risk pool
  2. Furnish a workplace free from recognized hazards likely to cause death or serious physical harm Correct answer.
  3. Post the agency's inspection schedule on the company intranet
  4. Guarantee that no employee will ever be injured on the job

Explanation

Section 5(a)(1) requires each employer to furnish employment and a place of employment free from recognized hazards that are causing or likely to cause death or serious physical harm. It is a gap-filler used when no specific standard applies, and it does not impose strict liability for every injury.

Question 2OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

A general industry employer wants to know which OSHA standards apply to its operations. Which part of Title 29 contains the general industry standards?

  1. Part 1910 Correct answer.
  2. Part 1904
  3. Part 1975
  4. Part 1926

Explanation

The general industry standards are codified in 29 CFR Part 1910, while construction standards sit in Part 1926. Recognizing the part number is the first step in determining which vertical standard governs a given task.

Question 3OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Which citation format correctly identifies the section of 29 CFR that contains the construction industry's general safety and health provisions?

  1. 29 CFR 1926.500
  2. 29 CFR 1926.20 Correct answer.
  3. 29 CFR 1904.32
  4. 29 CFR 1910.146

Explanation

Subpart C of Part 1926 begins at 29 CFR 1926.20, which states the general safety and health provisions applicable to construction work. Subpart C sets duties such as accident prevention responsibilities and employee training.

Question 4OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

An employer is engaged in construction work and a hazard is addressed by both a Part 1910 standard and a Part 1926 standard. Which standard generally governs?

  1. Neither standard applies until OSHA issues a citation
  2. The Part 1910 standard, because general industry standards always prevail
  3. Whichever standard the employer finds easier to comply with
  4. The Part 1926 standard, because the more specific construction standard applies Correct answer.

Explanation

OSHA's long-standing policy is that when a construction hazard is covered by a specific Part 1926 standard, that construction standard applies rather than the general industry counterpart. Specific standards govern over general ones addressing the same condition.

Question 5OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Under 29 CFR 1926.20(b)(1), what must an employer's accident prevention responsibilities include?

  1. A written program that initiates and maintains programs to provide safe working conditions Correct answer.
  2. A monthly inspection by a federal compliance officer
  3. A bond posted with the Department of Labor before work begins
  4. A union-approved safety committee at every jobsite

Explanation

Section 1926.20(b)(1) requires the employer to initiate and maintain such programs as may be necessary to comply with Subpart C, including measures to ensure safe working conditions. This is the foundation for jobsite safety programs and inspections.

Question 6OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

A construction employer's safety program must provide for frequent and regular inspections of jobsites, materials, and equipment. Who is permitted to perform those inspections under 29 CFR 1926.20(b)(2)?

  1. Only a licensed professional engineer
  2. Only a federal OSHA compliance officer
  3. Competent persons designated by the employer Correct answer.
  4. Any employee chosen at random each week

Explanation

Section 1926.20(b)(2) requires frequent and regular inspections by competent persons designated by the employer. The inspections are part of the employer's own accident prevention program, not a federal inspection activity.

Question 7OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

According to 29 CFR 1926.20(b)(4), what must an employer do before permitting an employee to operate equipment or machinery?

  1. Verify that the employee holds a state-issued operator license
  2. Provide the employee a copy of the OSH Act
  3. Train the employee in the safe operation of that equipment Correct answer.
  4. Require the employee to purchase personal protective equipment

Explanation

Section 1926.20(b)(4) prohibits permitting an employee to operate equipment or machinery without the required training. The employer must ensure the worker is trained in safe operation before assignment.

Question 8OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Under 29 CFR 1926.21, what training obligation does the employer have regarding employees exposed to conditions that could cause injury?

  1. Provide training only after the first recordable injury occurs
  2. Train only supervisors, who then informally advise their crews
  3. Provide safety and health training, including recognition and avoidance of unsafe conditions Correct answer.
  4. Delegate all training to the equipment manufacturer

Explanation

Section 1926.21(b) requires the employer to instruct each employee in the recognition and avoidance of unsafe conditions and in the regulations applicable to the work environment. Training must reach exposed employees, not just supervisors.

Question 9OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

A worker on a construction site cannot read English and English is not the language the worker understands. What does 29 CFR 1926.21(b)(2) require of the employer's safety training?

  1. The employer must transfer the employee to a non-construction position
  2. The employer must provide training in a language and manner the employee understands Correct answer.
  3. The employer must hire a full-time interpreter for the entire crew
  4. The employer is excused from training that employee

Explanation

Section 1926.21(b)(2) requires the employer to instruct employees who cannot read English in the language they understand. Training delivered in a language the worker does not comprehend does not meet the standard.

Question 10OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

What does 29 CFR 1926.23 require regarding first aid supplies on a construction site?

  1. A physician must be stationed at every site with more than ten workers
  2. First aid supplies must be readily accessible and a person trained to render first aid must be available Correct answer.
  3. An infirmary must be built before any site work begins
  4. First aid kits must be inspected by OSHA each quarter

Explanation

Section 1926.23 requires the employer to provide first aid supplies approved by the consulting physician and to have a person with first aid training available. The emphasis is on prompt access to supplies and trained assistance.

Question 11OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Under 29 CFR 1926.24, what must an employer do when employees are exposed to conditions that could cause injury or illness?

  1. Provide appropriate fire protection and adequate sanitation facilities Correct answer.
  2. Wait for OSHA to specify controls in a citation
  3. Limit work to daylight hours only
  4. Rely on employees to bring their own drinking water

Explanation

Section 1926.24 requires the employer to provide fire protection and prevention measures and adequate sanitation facilities for employee health and safety. These are baseline site conditions the employer must furnish.

Question 12OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

A construction employer assigns a worker to operate a piece of heavy equipment. Under 29 CFR 1926.20(b)(4), which action best satisfies the standard before the assignment?

  1. Assign a second worker to observe the operator from a distance
  2. Have the worker sign a waiver accepting the risk of operation
  3. Document that the worker watched a general safety orientation video two years earlier
  4. Confirm the worker has been trained in the safe operation of that specific equipment Correct answer.

Explanation

The paragraph bars allowing an employee to operate equipment without required training, so the employer must verify training specific to safe operation of that machinery. General orientation or a risk waiver does not substitute for equipment-specific training.

Question 13OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Which statement accurately describes the relationship between the OSH Act and state plans?

  1. States may operate their own plans only if OSHA approves them as at least as effective as the federal program Correct answer.
  2. State plans are prohibited because OSHA has exclusive jurisdiction
  3. State plans may lower protections to reduce employer costs
  4. State plans apply only to federal agencies within the state

Explanation

Section 18 of the OSH Act allows states to assume responsibility through a plan OSHA approves as at least as effective as the federal program. Approved state plans may adopt standards that are more protective than federal requirements.

Question 14OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

OSHA issues a citation to a construction employer. Under the OSH Act, what is the employer's route to contest the citation?

  1. File a notice of contest with the Secretary of Labor within 15 working days of receipt Correct answer.
  2. Appeal directly to the U.S. Supreme Court within 30 days
  3. File a grievance with the local building department
  4. Refuse to pay the penalty and wait for OSHA to sue

Explanation

Section 10(a) gives the employer 15 working days after receipt of the citation to notify the Secretary of Labor that it intends to contest. The contest is then heard by the Occupational Safety and Health Review Commission.

Question 15OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Which element is required for OSHA to establish a violation of the General Duty Clause rather than a specific standard?

  1. The employer must have previously been cited for the same condition
  2. The hazard must be recognized and likely to cause death or serious physical harm, with a feasible means to abate it Correct answer.
  3. The condition must be addressed by an existing Part 1910 standard
  4. The employee must have suffered an injury before the citation

Explanation

A General Duty Clause case requires a recognized hazard causing or likely to cause death or serious physical harm, employee exposure, and a feasible and useful abatement method. It is used where no specific standard applies, so an existing standard would displace it.

Question 16OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

What is the primary purpose of the construction standards in 29 CFR Part 1926 Subpart C?

  1. To set penalty amounts for willful violations
  2. To provide general safety and health requirements that apply across construction work Correct answer.
  3. To describe the process for obtaining a state plan approval
  4. To establish recordkeeping forms for injury logs

Explanation

Subpart C supplies general safety and health provisions that apply broadly to construction employment, such as accident prevention programs, training, first aid, and fire protection. More specific subparts address particular hazards.

Question 17OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

An employer argues that because it has a written safety program, it has satisfied 29 CFR 1926.20(b). Which interpretation is most accurate?

  1. A written program alone satisfies the rule regardless of implementation
  2. The rule applies only to employers with more than 50 workers
  3. The employer must actually initiate and maintain the program, including inspections and training Correct answer.
  4. The program must be filed with OSHA before work starts

Explanation

Section 1926.20(b) requires the employer to initiate and maintain programs, including frequent and regular inspections by competent persons and training before equipment operation. A document that is not implemented does not meet the obligation.

Question 18OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

Which of the following best describes the scope of employees covered by the OSH Act in the private sector?

  1. Only employees earning an hourly wage
  2. Only employees who are members of a labor union
  3. Only employees working in factories and manufacturing plants
  4. Employees whose employers are engaged in a business affecting interstate commerce, with limited statutory exceptions Correct answer.

Explanation

Section 3(5) defines employer broadly to reach businesses affecting interstate commerce, and Section 4(b) lists limited exclusions such as certain federal, state, and local government functions. Coverage is not limited by industry, union status, or pay type.

Question 19OSHA Act, General Industry vs. Construction standards, and 29 CFR 1926 Subpart C (General Safety and Health Provisions)

A construction employer maintains a written safety program but keeps no record of the periodic jobsite inspections its competent person performs. Which requirement of 29 CFR 1926.20(b)(2) does this practice most directly undermine?

  1. The program must be submitted to OSHA for approval before any site work begins
  2. The program must guarantee that no employee is ever exposed to a hazard above a permissible exposure limit
  3. The program must require that every employee hold a current OSHA 10-hour construction card before starting work
  4. The program must provide for frequent and regular inspections of jobsites, materials, and equipment by competent persons designated by the employer Correct answer.

Explanation

Section 1926.20(b)(2) requires the accident prevention program to provide for frequent and regular inspections of the jobsites, materials, and equipment by competent persons designated by the employer. A written program that is never implemented through documented, competent-person inspections fails that element. OSHA does not approve individual employer programs, and the provision does not mandate OSHA 10-hour cards or guarantee zero exposure.

Question 2029 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Which document is expressly required for PPE hazard assessments by general-industry 29 CFR 1910.132(d)(2), but is not generally required by construction's 29 CFR 1926 Subpart E?

  1. A daily equipment inspection log
  2. An incident report from the last injury
  3. A written hazard assessment certification Correct answer.
  4. A material safety data sheet only

Explanation

General-industry 29 CFR 1910.132(d)(2) requires a written certification identifying the evaluated workplace, certifier, assessment date, and document as a hazard assessment certification. Construction PPE criteria in 29 CFR 1926.95 require suitable protective equipment but do not impose that general written-certification requirement.

Question 2129 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

An employer requires workers to use hard hats, safety glasses, and steel-toe boots on a demolition site. Under Subpart E, who must pay for this required PPE?

  1. The employee through payroll deduction
  2. The equipment supplier under warranty
  3. The general contractor's insurer
  4. The employer at no cost to the employee Correct answer.

Explanation

Subpart E provides that the employer must pay for required PPE, with limited exceptions such as non-specialty safety-toe footwear that the employee may wear off the job site and prescription safety eyewear. The default rule is employer payment for protective equipment required by the standard.

Question 2229 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Before allowing an employee to use a respirator required by a Subpart D health standard, what must the employer complete?

  1. A fit test and medical evaluation per the respiratory protection program Correct answer.
  2. A written waiver signed by the employee
  3. A pulmonary function test only
  4. A toolbox talk documenting voluntary use

Explanation

When respirators are required, the employer must establish a written respiratory protection program that includes medical evaluation, fit testing, training, and care of the respirator. Fit testing and medical evaluation are prerequisites before required use, not optional formalities.

Question 2329 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Under Subpart F, what is the minimum fire extinguisher rating required for a construction site where ordinary combustibles such as wood and paper are the primary fire hazard?

  1. Class B rating only
  2. Class C rating only
  3. Class A rating only Correct answer.
  4. Class D rating only

Explanation

Ordinary combustibles like wood, paper, and rubbish are Class A fire hazards, and Subpart F requires extinguishers appropriate to the anticipated fire type. Class B covers flammable liquids, Class C covers energized electrical equipment, and Class D covers combustible metals.

Question 2429 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

According to Subpart D, how often must exposure monitoring be repeated when employees are exposed to noise at or above the 85 dBA action level?

  1. At least annually Correct answer.
  2. At least every six months
  3. Only after a complaint is filed
  4. At least every two years

Explanation

The noise standard requires monitoring whenever exposures may reach the action level, and repeat monitoring at least every two years when exposures are at or above the action level. However, when exposures exceed the permissible exposure limit, monitoring must be repeated at least annually.

Question 2529 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

An employee is exposed to a noise level of 100 dBA for an 8-hour shift. What is the maximum permissible exposure duration under the construction noise standard?

  1. 2 hours Correct answer.
  2. 8 hours
  3. 4 hours
  4. 1 hour

Explanation

The noise table in the construction standard permits 2 hours of exposure at 100 dBA. Each 5 dBA increase halves the allowable duration, so 95 dBA allows 4 hours and 105 dBA allows 1 hour.

Question 2629 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

A worker will be exposed to a substance with an 8-hour time-weighted average PEL. Which approach best determines compliance when exposure varies through the shift?

  1. Compare the highest instantaneous reading to the PEL
  2. Use only the first two hours of sampling
  3. Rely on the employee's self-report of symptoms
  4. Average the exposure over the full 8-hour shift and compare to the PEL Correct answer.

Explanation

Air contaminant limits in Subpart D are expressed as 8-hour time-weighted averages for full-shift exposures. Compliance is judged by integrating the varying concentrations over the sampling period rather than by a single peak reading.

Question 2729 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

On a site where employees may be exposed to silica dust from cutting concrete, which control method does Subpart D require the employer to use first?

  1. Posting a warning sign at the entrance
  2. Rotating workers to limit exposure duration
  3. Engineering controls such as wet cutting or local exhaust ventilation Correct answer.
  4. Respiratory protection as the primary control

Explanation

Subpart D follows the hierarchy of controls, requiring feasible engineering and work practice controls before relying on respirators. Wet cutting and local exhaust ventilation are recognized engineering controls for silica-generating tasks.

Question 2829 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Under Subpart E, an employee's eye protection must meet which requirement?

  1. It must be provided by the employee at personal expense
  2. It must be marked as meeting the consensus standard for eye protection Correct answer.
  3. It must be replaced monthly regardless of condition
  4. It must be tinted to reduce glare

Explanation

Subpart E requires protective equipment to be approved or meet the consensus standard for the specific hazard, and eye protection must bear the appropriate marking. Employers must ensure equipment is in safe condition and fits the user.

Question 2929 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

A crane is operating near a power line and the employer uses a fire-resistant blanket as a safeguard. Which additional requirement applies under Subpart F?

  1. The blanket must be rated for Class D fires
  2. The operator must wear a Class C extinguisher
  3. The equipment must be grounded and the line de-energized or the blanket used with proper clearance Correct answer.
  4. The blanket must be inspected annually only

Explanation

Subpart F addresses fire prevention around ignition sources, and power line work requires either de-energizing and grounding or maintaining the required clearance with insulating safeguards. Fire-resistant blankets are used as insulating protection while respecting clearance distances.

Question 3029 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

When must an employer provide a fire extinguisher on a construction site under Subpart F?

  1. Whenever a fire hazard exists that could be controlled by portable extinguishers Correct answer.
  2. Only during hours when a fire watch is assigned
  3. Only if the local fire department requires it
  4. Only when more than 25 employees are present

Explanation

Subpart F requires portable fire extinguishers, or an equivalent fire protection program, where a fire hazard exists. The employer must also ensure extinguishers are maintained, inspected, and accessible, and that employees are trained if they are expected to use them.

Question 3129 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

During hot work involving welding, what must the employer ensure before the operation begins?

  1. A fire watch and removal of combustibles within the area, or other approved safeguards Correct answer.
  2. That a permit is posted for 24 hours afterward
  3. That the welder holds a Class C extinguisher
  4. That the work occurs only on weekends

Explanation

Hot work requires fire prevention measures such as a fire watch, clearing combustibles, or using approved guards to contain sparks and slag. These safeguards must be in place before and during the operation.

Question 3229 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

An employer assigns a fire watch during hot work. What is the fire watch's primary duty?

  1. To monitor for and respond to fire conditions and sound an alarm Correct answer.
  2. To inspect the site's electrical grounding
  3. To maintain the hot work permit file
  4. To perform the welding when the welder is on break

Explanation

A fire watch is assigned to watch for fire, extinguish incipient fires, and notify emergency responders if needed. The fire watch must remain in place during the operation and for a period afterward to detect smoldering combustibles.

Question 3329 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

A construction worker is exposed to a chemical with an 8-hour PEL of 50 ppm. Sampling shows 40 ppm for 4 hours and 20 ppm for 4 hours. How does the exposure compare to the PEL?

  1. It is below the PEL at 30 ppm TWA Correct answer.
  2. It cannot be evaluated without peak sampling
  3. It exceeds the PEL because one period is above 50 ppm
  4. It equals the PEL at 30 ppm TWA

Explanation

The time-weighted average is calculated as (40 ppm x 4 h + 20 ppm x 4 h) / 8 h = 30 ppm. That value is below the 50 ppm PEL, so the exposure is compliant for the full shift.

Question 3429 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

An employee wears a half-mask respirator with an assigned protection factor of 10. The airborne concentration is 120 ppm and the substance has a PEL of 10 ppm. What is the maximum use concentration for this respirator?

  1. 1,200 ppm
  2. 120 ppm
  3. 100 ppm Correct answer.
  4. 10 ppm

Explanation

The maximum use concentration is the assigned protection factor multiplied by the exposure limit, so 10 x 10 ppm = 100 ppm. Because the measured 120 ppm exceeds that value, this respirator alone is not adequate and a higher-protection respirator is needed.

Question 3529 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Which situation would require the employer to provide a hearing conservation program rather than only monitoring under the construction noise standard?

  1. Employee exposure at 80 dBA for 8 hours
  2. Employee exposure at 75 dBA for 4 hours
  3. Employee exposure at or above 85 dBA for 8 hours Correct answer.
  4. Employee exposure at 70 dBA for 8 hours

Explanation

The action level of 85 dBA as an 8-hour TWA triggers the hearing conservation program, including audiometric testing, hearing protection availability, and training. Exposures below the action level do not require the program.

Question 3629 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

A site's fire protection plan must address which element when employees are expected to use portable extinguishers?

  1. Requiring all employees to fight incipient fires
  2. Training employees on extinguisher use and the hazards involved Correct answer.
  3. Storing extinguishers in a locked office
  4. Replacing extinguishers after each use only

Explanation

Subpart F requires that employees expected to use fire extinguishers be trained in their use and the hazards involved. The employer must also ensure extinguishers are inspected, maintained, and accessible.

Question 3729 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

Which statement best describes the employer's duty when an employee provides their own non-specialty safety-toe footwear for a construction site?

  1. The employer must reimburse the full retail price
  2. The employer must pay for all footwear regardless of type
  3. The employer may allow employee-provided safety-toe footwear that meets the standard Correct answer.
  4. The employer must prohibit employee-provided footwear

Explanation

Subpart E permits employees to provide their own non-specialty safety-toe footwear as long as it meets the protective requirements. The employer remains responsible for ensuring the footwear is adequate for the hazards present.

Question 3829 CFR 1926 Subparts D–F: Occupational Health and Environmental Controls, Personal Protective and Life Saving Equipment, Fire Protection and Prevention

An employer is evaluating whether PPE fits each affected employee. Which factor is most relevant under Subpart E?

  1. The PPE was purchased in bulk for the whole crew
  2. The PPE was the least expensive compliant option
  3. The PPE is sized and selected to fit the individual user Correct answer.
  4. The color of the PPE matches company branding

Explanation

Subpart E requires that PPE fit each affected employee and be selected for the specific hazard. Proper fit is essential for effectiveness, particularly for respirators, hearing protection, and eye protection.

Question 3929 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.200, what color must predominate in the upper panel of a danger sign?

  1. Orange
  2. Red Correct answer.
  3. Green
  4. Yellow

Explanation

The regulation specifies red as the predominant color in a danger sign's upper panel, with black borders and a white lower panel for additional wording. It does not assign red to every accident-prevention sign or require all lettering to be red.

Question 4029 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

A construction crew must post a sign warning of a falling-load hazard. Under 29 CFR 1926.200, which basic color applies to caution signs of this type?

  1. Red
  2. Yellow Correct answer.
  3. Black
  4. Green

Explanation

Caution signs warn of potential hazards such as falling loads and must use yellow as the basic color, typically with black lettering and a black upper panel bearing the word CAUTION in yellow. Red is limited to danger and accident-prevention messages.

Question 4129 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

According to 29 CFR 1926.201, what does a red flag used as a signaling device require of approaching traffic?

  1. Traffic must proceed with caution only when waved through
  2. Traffic must stop and wait for a green flag
  3. Traffic must come to a complete stop Correct answer.
  4. Traffic may proceed at reduced speed

Explanation

Section 1926.201(a) provides that signaling by flaggers and the use of flags shall conform to Part VI of the MUTCD. A red flag displayed to oncoming traffic signals that traffic must stop until the flagger directs otherwise.

Question 4229 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.202, barricades used for protection of employees must meet which requirement?

  1. They must be anchored with concrete
  2. They must be at least 6 feet tall
  3. They must be painted white
  4. They must comply with the MUTCD Correct answer.

Explanation

Section 1926.202 requires that barricades for protection of employees conform to the applicable portions of the MUTCD. The standard does not prescribe a fixed height, color, or anchoring method beyond that conformity.

Question 4329 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

A traffic-control signaling device intended to warn of a hazard must be visible to drivers. Under 29 CFR 1926.200(a), signs must be what?

  1. Approved by a licensed engineer
  2. Made of metal
  3. Legible and in English Correct answer.
  4. Removed at night

Explanation

Section 1926.200(a) requires that signs be legible and that the wording be in English, with additional languages permitted where needed for comprehension. This ensures workers and drivers can read the hazard message.

Question 4429 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

A supervisor plans to use a danger sign where an immediate hazard exists. Under 29 CFR 1926.200(c), how must danger signs be distinguished from caution signs?

  1. Danger signs use yellow with black letters
  2. Danger signs use orange with black letters
  3. Danger signs use green with white letters
  4. Danger signs use red as the basic color with contrasting letters Correct answer.

Explanation

Section 1926.200(c) specifies that danger signs use red as the basic color with contrasting letters such as white. Caution signs, by contrast, use yellow with black lettering. The color distinction signals the relative severity of the hazard.

Question 4529 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.250(a)(1), how must all materials stored in tiers be secured?

  1. By stacking, blocking, interlocking, or limiting height Correct answer.
  2. By covering with tarps
  3. By placing on wooden pallets only
  4. By tying with rope only

Explanation

Section 1926.250(a)(1) requires stored materials to be stacked, blocked, interlocked, and limited in height so they are stable and secure against sliding or collapse. Any combination achieving stability is acceptable.

Question 4629 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

A stack of lumber is stored outdoors on a construction site. Under 29 CFR 1926.250(a)(2), what must be provided for drainage?

  1. A concrete pad
  2. A sump pump
  3. A raised steel rack
  4. Adequate drainage Correct answer.

Explanation

Section 1926.250(a)(2) requires storage areas to be kept free from accumulation of materials that could cause tripping, fire, or explosion, and to have adequate drainage. Water accumulation undermines stability and creates slip hazards.

Question 4729 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.250(b)(1), how high may a stack of bagged materials be built when they are to be manually handled?

  1. No more than 10 feet
  2. No more than 20 feet
  3. No more than 4 feet
  4. To a height that ensures stability Correct answer.

Explanation

Section 1926.250(b)(1) requires bagged materials to be stacked by stepping back the layers and cross-keying the bags at least every 10 bags high, and stacks must be stable. The standard governs stability rather than a single fixed height.

Question 4829 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.250(b)(2), what must be done to a stack of bricks that is more than 4 feet high?

  1. Tapered back one-quarter of the width at the base Correct answer.
  2. Covered with plastic sheeting
  3. Restacked daily
  4. Tied with wire

Explanation

Section 1926.250(b)(2) requires brick stacks over 4 feet high to be tapered back one-quarter of the width of the stack at the base. This tapering improves stability and reduces the risk of toppling.

Question 4929 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.250(b)(5), how must cylindrical materials stored in racks be secured?

  1. By wedges or chocks at the bottom tier Correct answer.
  2. By placing them in bins
  3. By tying each cylinder to the rack
  4. By stacking them horizontally

Explanation

Section 1926.250(b)(5) requires cylindrical materials stored in racks to be prevented from spreading by providing wedges or chocks at the bottom tier. This keeps the cylinders from rolling out of the rack.

Question 5029 CFR 1926 Subparts G–H: Signs, Signals and Barricades; Materials Handling, Storage, Use and Disposal

Under 29 CFR 1926.250(b)(8), how must materials stored in a silo or bin be handled to prevent collapse?

  1. By emptying it weekly
  2. By inspecting and maintaining the structure Correct answer.
  3. By keeping the silo sealed
  4. By loading from the top only

Explanation

Section 1926.250(b)(8) requires silos and bins to be inspected and maintained to prevent collapse. Structural integrity of the container is the key safeguard for workers nearby.