BCSP CHSTFree Construction Health & Safety Technician practice test

Correct answer: D. Class D

Combustible-metal fires — magnesium among them — need a dry-powder agent rather than water or foam, which is exactly what defines the Class D category. Wood and paper fires sit in Class A, flammable liquids in Class B, and energized electrical equipment in Class C, so a burning metal points squarely to Class D.

Correct answer: A. Safety training

Five dominoes make up Heinrich's sequence — environment of the risk, fault of a person, unsafe act or condition, accident, and injury — and knocking down any one of them can stop the chain before it reaches the last domino. Safety training never appears among these five; it's a prevention measure, not a causal factor the model tracks.

Correct answer: A. On doors that might be mistaken for an exit

Any door that could be confused for an exit during a real evacuation needs a "NOT AN EXIT" sign, since occupants moving under pressure shouldn't waste time discovering a dead end. Storage-room doors only need the sign if they're likely to be mistaken for an exit in the first place; true exit doors should never carry it, and ventilation windows aren't the kind of opening anyone would try to escape through.

Correct answer: A. Monthly

A monthly visual check is what OSHA requires, catching problems like corrosion, physical damage, or a drop in pressure before an extinguisher is needed in an emergency. A separate annual maintenance/service requirement also exists, but the visual walk-around is monthly — stretching it to biannual would let defects sit unnoticed too long, while going weekly would be more frequent than the rule demands.

Correct answer: B. Class F

NFPA divides fires by fuel type: A for ordinary combustibles like wood and paper, B for flammable liquids, C for energized electrical equipment, D for combustible metals, and K for cooking oils and greases. "Class F" simply doesn't exist in this scheme, which is what makes it the odd one out.

Correct answer: D. Energized electrical equipment like wiring, controls, and motors

Class C covers fires involving live electrical equipment such as wiring, controls, motors, data-processing gear, or appliances — sources that can ignite from a spark, surge, or short and that often sit somewhere hard to reach. Wood, paper, and cloth belong to Class A, flammable liquids to Class B, and combustible metals to Class D, leaving electrical-equipment fires as the Class C answer.

Correct answer: A. As fuel gases and to form special atmospheres in heat-treating furnaces

LPG's main jobs are serving as a fuel gas and creating the special atmospheres needed inside heat-treating furnaces. Plastics manufacturing draws on other petrochemical feedstocks instead, refrigeration systems rely on dedicated refrigerants rather than LPG, and food processing has no functional use for it as an additive.

Correct answer: A. For at least 30 years after the employee’s employment ends

OSHA requires these records to stay on file for at least 30 years past the end of employment, a window long enough to catch health effects that surface years later. Stopping at the end of employment, holding records for just one additional year, or discarding them entirely all fall short of what OSHA mandates for tracking exposure and supporting future claims.

Correct answer: A. As a new employee and annually thereafter

New hires need the training up front, and every employee needs it repeated annually after that — that combination is what keeps everyone current and ready to act. A single session at rollout, training limited to once a year without the new-hire trigger, or a biannual schedule would each leave gaps that let readiness slip and risk rise during an actual emergency.

Correct answer: B. After an employee is trained on bloodborne pathogens and before they are exposed to potentially infectious materials

Employers must make the vaccine available once an employee has completed bloodborne-pathogen training but before that employee faces potential exposure to infectious materials, so protection is in place ahead of any risk. Waiting until after exposure defeats the purpose of prevention; offering it to everyone within 24 hours of hire regardless of role isn't required or always practical; and limiting the offer to employees who happen to ask for it ignores the proactive duty owed to every at-risk worker.