CHST QUESTIONS AND ANSWERS 2024, Exams of Social Sciences

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CHST QUESTIONS AND ANSWERS

When must a handrail be added to stairwell? - Answers- When it is 30 inches or one having four or more risers. What are four concerns a CHST must address regarding unsafe use of ladders and stairwells? - Answers- Slippery conditions, handrails on specific types, not used for storage and examined for weak structure. Specifications state that scaffolding must be of sufficent strength to hold more than how many times its specified weight? - Answers- 4 times. What type of respirator is not good for workers with asthma? - Answers- Negative pressure. Workers medical conditions are factors in choosing respirators. What are the three main factors to consider when choosing respirators? - Answers- 1. The physical configuration of the jobsite. 2. The workers medical conditions. 3. Worker comfort. What does MFF stand for? - Answers- Metal Fume Fever. What are the symptoms of MFF? - Answers- Resemble classical flu symptoms. Welders who work with hat tend to have higher incidence of MFF? - Answers- Zinc Oxides What can prevent MFF? - Answers- Welders to wear respirators and local or exhaust ventilation can effect nearby workers. What are the safe operating procedures pertaining to utlility and service lines when a building is being prepared for demolitions. - Answers- 1. Conduct survey inspection. 2. Document specific hazards. 3. Evaluate utility functions servicing the building. What utlilties must be cute before demolition begins? - Answers- Electric, water, gas, sewer and any other service. What should the survey report include for demolition? - Answers- Whether there are dangers posed to workers or the environment like chemicals, gases, explosives, flammables or other hazardous materials in storage tanks. When can materials be dropped through floor openings? - Answers- When the drop area is completely enclosed and barricaded. Barricades must be at least 42 inches high and no closer to the drop area than 6 feet.

From which height must a chute be used when removing waste form upper levels of buildings? - Answers- 20 feet. The chute can be made of wood, alloyed metal and must be securely anchored. Should glass windows be removed before demolition? - Answers- YEs, when there are concerns for workers being cut by broken glass. What does exit discharge mean? - Answers- It refers to an exit which lead directly to an outdoor area or street. How often should ropes and rigging in suspension scaffolding be inspected for damage? - Answers- At the beginning and during each shift. How far from electrical power lines must a scaffold be? - Answers- 10 feet What are three things scaffolds must have? - Answers- Toe boards, guardrails and mid rails. How many catagories does an MSDS have? - Answers- 16 What is the cheif concern in choosing the appropriate respirator? - Answers- Material hazards presented by the worksite. Define exit routes? - Answers- Exit routes are different from exit discharges in that they do not necessarily pas out into a street, yard, or open area. An exit route often leads to a refuge area. What are refuge areas? - Answers- Places along an exit routes which have fire resistant protections which will retard the advance of flames and smoke. What does occupant lead refer to? - Answers- THe maximum number of persons who may be accommodated by the emergency exit routes and plans. What are the four types of standpipe systems? - Answers- 1. A small hose system. 2. Class I 3. Class II. 4. Class III. What is a small hose system? - Answers- One in the diameter range of from 5/8 to 1 1/2. This may be helpful in controlling incipient stage fires. What is a Class I standpipe? - Answers- Refers to 2 1/2" hose connection for use by fire departments and those trained in handling heavy fire hoses. What is a Class II standpipe? - Answers- Refers to a 1 1/2 inch hose system which is capable of controlling incipient stage fires.

What is a Class III standpipe? - Answers- Refers to a combined system of hose which is for use of employees trained in the use of hose operations and which is capable of furnishing effective water discharge during the more advanced stages of fire. What is dilution ventilation? - Answers- The must less costly type of method for raising air quality to permissible levels. It consists of addition additional clean air to the contaminated air inside of a building and is usually done by means of intake fans for natural venting through doors and windows. This can be ineffective an requires constant mointoring. It can be effective if air contaiminants are not far able the PEL. What is local exhaust ventilation? - Answers- More costly than natural or forces air- intake methods. Requires the installation of machinery to collect and filter contaminants from the air before it can move from the source of the contamination. When natural or forced air dilution methods are ineffective, such as in the removal of flammable vapors or dust, exhaust ventialtion must be used to collect hazardous material. What are the three main types of installation for employee emergency fire alarm or sprinkling systems? - Answers- 1. Conventional Sprinkler Systems

2. Audible Alarms
3. A Pre-Discharge Alarm What is a pre-discharge alarm? - Answers- An alarm which sounds some seconds prior to the discharge of an extinguishing sprinkler system. The pre-discharge alarm gives employees time to evacuate the building prior to the water or chemical extinguishing discharge. What is the OSHA's VPP stand for? - Answers- Voluntary Participation Program What are four concepts of the worksite analysis for OSHA's VPP? - Answers- 1. Hazards identified and isolated early.
4. Safety teams to join together to analyze news processes, materials, or equipment.
5. Employer encourages reporting of observations and concerns to management and recommend solutions.
6. Data collection to identify areas requiring remediation. How do you fiqure out the weight of a substance measure in gallons? - Answers- Know the weigh of one gallon of water (8.34) and multiply the total gallon s.g by 1.8. For example, if it is 3000 gallons, mulitiply that by 8.34 equaling 25,020 then mutliply that by 1.8 = 45,036. What are two of the main componets that are part of the management commitment to worker safety required by the VPP program? - Answers- 1. Hazard Prevention and Control
7. Safety and Health Training

What does VPP want out of Hazard Prevention and Control? - Answers- 1. Committment

2. Hazard identification entered into programs.
3. System of fair discipline for both management and workers. What does VPP want out of the Safety and Health Training? - Answers- 1. Intensive and continuous training.
4. Training schedules to be documented.
5. Method to assess comprehension of safety standards, hazards and safe practices.