CSLB General Building (B) Trade Practice Test

Câu hỏi luyện tập mẫu

Một vài câu hỏi thực tế từ ngân hàng miễn phí này, kèm giải thích đầy đủ. Dùng công cụ luyện tập ở trên cho toàn bộ.

1. 1. Intro to OSHA

   What year was the Occupational Safety and Health Act signed into law, creating OSHA?

   • a.1970
   • b.1965
   • c.1980
   • d.1955

   Đáp án: a

   Giải thích: The Occupational Safety and Health Act was signed into law in 1970 and OSHA began operating in 1971. Its purpose is to assure safe and healthful working conditions for workers. It also established the National Institute for Occupational Safety and Health.

2. 2. Intro to OSHA

   Who is responsible for providing required personal protective equipment (PPE) in most cases?

   • a.The worker, purchased personally
   • b.The equipment manufacturer directly
   • c.The employer, generally at no cost to the worker
   • d.OSHA inspectors

   Đáp án: c

   Giải thích: Employers are generally required to provide required PPE at no cost to employees, with limited exceptions such as ordinary safety-toe footwear allowed to be worn off-site. Employers must also ensure PPE is properly maintained and that workers are trained in its use. This helps remove cost as a barrier to protection.

3. 3. Common Hazards

   A worker is hit by a swinging load from a crane. Which Focus Four category does this fall under?

   • a.Caught-in/between
   • b.Fall
   • c.Electrocution
   • d.Struck-by

   Đáp án: d

   Giải thích: Being hit by a moving or swinging object such as a crane load is a struck-by hazard. Struck-by incidents also include flying, falling, and rolling objects. Controls include barricading swing zones and keeping workers clear of suspended loads.

4. 4. Common Hazards

   Which is a common caught-in/between hazard during trenching operations?

   • a.Sunburn
   • b.Cave-in of unprotected trench walls
   • c.Loud noise
   • d.Slippery floors

   Đáp án: b

   Giải thích: A cave-in of unprotected trench walls is a deadly caught-in/between hazard because soil is extremely heavy and can bury a worker in seconds. Protective systems and competent-person inspections are essential. Even shallow collapses can cause fatal crushing injuries.

5. 5. Common Hazards

   Which is the correct order of the hierarchy of controls from most to least effective?

   • a.Elimination, substitution, engineering controls, administrative controls, PPE
   • b.PPE, administrative, engineering, substitution, elimination
   • c.Administrative, PPE, elimination, engineering, substitution
   • d.Substitution, PPE, elimination, engineering, administrative

   Đáp án: a

   Giải thích: The correct hierarchy from most to least effective is elimination, substitution, engineering controls, administrative controls, and PPE. Higher-level controls are more reliable because they do not depend on worker behavior. PPE is the last line of defense.

6. 6. Fall Protection

   When must a scaffold be inspected?

   • a.Only once a year
   • b.Only when it collapses
   • c.Before each work shift and after any event that could affect its integrity
   • d.Never

   Đáp án: c

   Giải thích: Scaffolds must be inspected by a competent person before each work shift and after any occurrence that could affect their structural integrity, such as a storm. Defective scaffolds must be tagged and taken out of service. Regular inspection prevents scaffold collapses and falls.

7. 7. Fall Protection

   When is a floor hole or opening a fall hazard that must be protected?

   • a.Only if larger than a door
   • b.Never, holes are always safe
   • c.Only outdoors
   • d.When a worker could fall through or step into it, requiring covers or guardrails

   Đáp án: d

   Giải thích: Holes and openings in floors or roofs through which a worker could fall must be protected with covers, guardrails, or personal fall arrest. Covers must be secured and marked, and be able to support the intended loads. Unprotected openings are a common and preventable fall hazard.

8. 8. Electrical & PPE

   What is the correct action if a coworker is in contact with a live electrical source?

   • a.Grab them immediately with bare hands
   • b.De-energize the source or use a non-conductive object to separate them, then call for help
   • c.Pour water on them
   • d.Do nothing and wait

   Đáp án: b

   Giải thích: You should never touch a person who is in contact with a live electrical source with bare hands, because the current can pass to you. First de-energize the source if possible, or use a non-conductive object to separate the person from the source, then call for emergency help. Attempting a bare-hand rescue can create a second victim.

9. 9. Electrical & PPE

   What is the danger of overloading an electrical circuit or extension cord?

   • a.Overheating that can cause fires and equipment damage
   • b.It saves money
   • c.Faster tool operation
   • d.There is no danger

   Đáp án: a

   Giải thích: Overloading a circuit or cord draws more current than it is rated for, causing it to overheat and potentially start a fire or damage equipment. Cords should be sized for the load and length of the run. Daisy-chaining cords and power strips increases this risk.

10. 10. Health & Safety Programs

    What is a symptom of heat exhaustion that workers should recognize?

    • a.Feeling energetic
    • b.Improved concentration
    • c.Heavy sweating, weakness, dizziness, and nausea
    • d.No symptoms at all

    Đáp án: c

    Giải thích: Heat exhaustion symptoms include heavy sweating, weakness, dizziness, headache, nausea, and clammy skin. Affected workers should move to a cool area, rest, and drink water. If symptoms worsen or confusion appears, it may signal heat stroke, a medical emergency.