OHST Exam Practice Test

1. Where can one quickly find information about what personal protective equipment to wear when handling a particular substance?

a. At the manufacturer's website
b. At the OSHA website
c. On the substance's label
d. On the substance's MSDS

2. What type of machine guard should be installed to keep a person's hand from nearing a dangerous point?

a. Barrier guards
b. Point of operation guards
c. Hand trips
d. Presence-sensing devices

3. As part of an effective accident prevention program, what accidents and incidents must be documented?

a. All accidents and incidents in which someone required first aid
b. All accidents and injuries in which someone required hospitalization
c. All accidents and injuries in which a fatality occurred
d. All accidents and injuries that could have resulted in injury

4. A process that can predict possible failures is

a. Root Cause Analysis
b. Failure Mode and Effect Analysis
c. Pareto charts
d. Ishikawa diagrams

5. Face shields provide protection

a. From projectile/physical contact
b. From splash hazards
c. From electromagnetic radiation
d. Only when used with primary eye protection

6. During radioactive decay, the number of which subatomic particles in an element changes?

a. Protons
b. Electrons
c. Neutrons
d. Protons and neutrons

7. What shielding material can effectively block beta particles?

a. Paper
b. A thin sheet of metal
c. A thick block of lead or other high-mass density materials
d. No shielding materials can block beta particles

8. Hepatotoxins are chemicals that damage the

a. Blood
b. Liver
c. Kidneys
d. Neurons

9. Where can one find information about OSHA regulations regarding fire detection?

a. OSHA 1910.164
b. OSHA 1910.39
c. OSHA 1910.157
d. OSHA 1910.156

10. Employers are required to have a fire prevention plan if

a. They have more than 10 employees
b. They handle or store hazardous materials
c. They are located more than 3 miles from the nearest fire station
d. All employers are required to have a fire prevention plan.

11. During radioactive decay, the number of which subatomic particles in an element changes?

a. Protons
b. Electrons
c. Neutrons
d. Protons and neutrons

12. What shielding material can effectively block beta particles?

a. Paper
b. A thin sheet of metal
c. A thick block of lead or other high-mass density materials
d. No shielding materials can block beta particles

13. Hepatotoxins are chemicals that damage the

a. Blood
b. Liver
c. Kidneys
d. Neurons

14. Where can one find information about OSHA regulations regarding fire detection?

a. OSHA 1910.164
b. OSHA 1910.39
c. OSHA 1910.157
d. OSHA 1910.156

15. Employers are required to have a fire prevention plan if

a. They have more than 10 employees
b. They handle or store hazardous materials
c. They are located more than 3 miles from the nearest fire station
d. All employers are required to have a fire prevention plan.

 

OHST Exam Answer Key

1. D: An MSDS, or Material Safety Data Sheet, lists information about the physical and chemical properties of a substance, including its toxicity, cleanup protocols, known exposure limits, and required personal protective equipment. The MSDS for all substances in a workplace must be readily available.

2. A: Barrier guards encase machinery to keep a person's hand from nearing the point of danger. Point of operation guards on a machine are located directly at the danger zone, while presence-sensing devices prevent a machine from operating when an unwanted object is near a point of operational danger. Hand trips are buttons that must be pressed before a machine can be operated; the hand trips must be placed away from dangerous areas.

3. D: All accidents and injuries that could have resulted in injury should be documented. OSHA must be notified of incidents in which there was a fatality or three or more employees required hospitalization. However, by documenting even non-reportable, minor accidents and injuries, data can be gathered to help prevent future accidents and injuries from occurring.

4. B: Failure Mode and Effect Analysis (FMEA) can predict possible failures of equipment, tools, and processes. During FMEA, each part of a piece of equipment or step of a process is evaluated in order to consider all possible failures, the effects of such failures, and risk management techniques to avoid failures. Root Cause Analysis (RCA) is a process for identifying the root cause of an event. Pareto charts and Ishikawa diagrams can be part of an RCA to help evaluate possible root causes.

5. D: Face shields are secondary protection devices and should be used only along with appropriate eye protection such as safety glasses or goggles.

6. A: During radioactive decay, the number of protons in an element changes. This changes the identity of the element because the number of protons defines the element. Changes in neutrons lead to isotopes, while changes in electrons lead to ions.

7. B: Beta particles are small particles with high kinetic energy that can be blocked by thin sheets of metal. Alpha particles are heavier and slower and can be blocked by paper. Gamma radiation is the most penetrating and must be blocked by thick blocks of shielding material such as lead.

8. B: Hepatotoxins damage the liver, while nephrotoxins damage the kidneys, neurotoxins damage the neurons, or nerve cells, and hemotoxins damage blood cells.

9. A: OSHA 1910.164 addresses fire detection, while OSHA 1910.39 addresses fire prevention. OSHA 1910.157 addresses fire extinguishers, and OSHA 1910.156 addresses fire brigades.

10. D: All employers are required to have a fire prevention plan. The plan must be written if a company has more than 10 employees and may be oral if a company has fewer than 10 employees.

11. A: During radioactive decay, the number of protons in an element changes. This changes the identity of the element because the number of protons defines the element. Changes in neutrons lead to isotopes, while changes in electrons lead to ions.

12. B: Beta particles are small particles with high kinetic energy that can be blocked by thin sheets of metal. Alpha particles are heavier and slower and can be blocked by paper. Gamma radiation is the most penetrating and must be blocked by thick blocks of shielding material such as lead.

13. B: Hepatotoxins damage the liver, while nephrotoxins damage the kidneys, neurotoxins damage the neurons, or nerve cells, and hemotoxins damage blood cells.

14. A: OSHA 1910.164 addresses fire detection, while OSHA 1910.39 addresses fire prevention. OSHA 1910.157 addresses fire extinguishers, and OSHA 1910.156 addresses fire brigades.

15. D: All employers are required to have a fire prevention plan. The plan must be written if a company has more than 10 employees and may be oral if a company has fewer than 10 employees.