Free Construction Health and Safety Technician Questions and Answers — Questions and Answers
Question 1: What danger is present when painters and electricians are finishing in the same room during the last stages of a project?
- Fire (Correct answer)
- Improper illumination
- Slips, trips, and falls
- Noise
Correct answer: Fire
The risks posed by numerous activities taking place in one site must be taken into account whenever multiple trades or contractors are working there. As an illustration, while painters are painting trim using oil-based paint (a flammable hazard), electricians may be checking the lights (an ignite source). The combustible fumes from this job could catch fire if sparks from the work are produced. The risks associated with each task can increase if you work close to other contractors.
Question 2: What angle cannot the trench wall surpass if a five-foot-deep clay trench is dug?
- 72 degrees
- 63 degrees
- 53 degrees (Correct answer)
- 22.5 degrees
Correct answer: 53 degrees
After determining the soil type using 29 CFR 1926 Subpart P, Appendix A, the maximum slope angle can then be found by cross-referencing 29 CFR 1926 Subpart P, Appendix B. Clay is a "cohesive" Type-A material and requires a maximum slope angle of 53 degrees, with an associated height-to-depth ratio of 34 to 1. Therefore, a 3.75-foot angle, or 53 degrees, is the maximum needed for a five-foot trench. Any angle greater than this can cause the structure to collapse.
Question 3: Which of the following is used to determine lifting index (LI)?
- Load weight ÷ weight of worker
- (Load weight ÷ worker age)2
- Load weight x recommended weight limit (Correct answer)
- Load weight ÷ recommended weight limit
Correct answer: Load weight x recommended weight limit
A manual lift's proportionate physical strain and injury risk are measured by the lifting index (LI). The recommended weight limit (RWL) is multiplied by the load weight to determine the LI. For a typical, healthy employee, a LI score of less than 1.0 suggests little risk, while a result of higher than 1.0 denotes a danger of injury during the lift.
Question 4: Which action should be taken FIRST to lessen a painter's exposure to volatile organic compounds (VOCs) contained in oil-based paint, according to the hierarchy of controls?
- Restrict oil-based paints to exterior application only.
- Replace the paint with a water-based formulation. (Correct answer)
- Reduce the amount of time the worker paints on any given day.
- Provide the painter with an air-purifying respirator with organic vapor cartridges.
Correct answer: Replace the paint with a water-based formulation.
The hierarchy of controls is set up so that the best hazard mitigation strategy is chosen before less protective ones. Elimination is the first factor to be taken into account when using this theory; if there is no danger, there is no hazard. VOC exposure can be avoided by switching to a water-based paint instead of an oil-based one.
Question 5: In order to achieve a safe lift, which of the following does a mobile crane operator NOT need to be aware of?
- The width of the jib (Correct answer)
- Whether the tires are fully inflated
- Whether the outriggers are extended or retracted
- The angle of the boom
Correct answer: The width of the jib
A crane operator must be informed of the crane's capabilities and limitations in order to ensure a safe lift. Outriggers should always be used, and they should be placed on solid, level ground. How much of the crane's maximum rated load it can lift without tipping over will depend on the boom's angle. Finally, to lessen the chance of tipping, the tires must be fully filled.
Question 6: What area of the body receives the least amount of meaningful fall arrest force from a body harness?
- Thighs
- Shoulders
- Lower back (Correct answer)
- Pelvis
Correct answer: Lower back
The part of a personal fall system that fastens to the worker is called a body harness. To securely distribute the forces required to halt a fall, the harness is made up of a number of straps that wrap over the thighs, pelvis, chest, and shoulders.
Question 7: What definition of "recommended weight limit" (RWL) is the most accurate?
- The maximum weight associated with a body mass index of 25 (threshold of “overweight”)
- The weight at which a back-support apparatus should be worn
- The maximum weight that healthy workers could safely lift for up to eight hours (Correct answer)
- A lifting weight of 50 pounds for healthy male workers and 30 pounds for healthy female workers
Correct answer: The maximum weight that healthy workers could safely lift for up to eight hours
The weight that healthy workers could lift for up to eight hours without increasing their risk of musculoskeletal injuries is known as the recommended weight limit (RWL). It is determined as the result of multiplying the load constant by the horizontal, vertical, distance, asymmetry, frequency, and coupling multipliers.
Free Construction Health and Safety Technician Questions and Answers
What danger is present when painters and electricians are finishing in the same room during the last stages of a project?