Chapter 16 & 17 Review
“Tools and Machine Controls” AND “Principle of Risk and Machine Guarding”
1. When using anthropometric data to design tools and controls, what percentile data should be used for the following:
a. The opening in the handle of the of scissors or tin snips
50th
b. The height of an emergency stop button
5th
c. The handle of a large, heavy duty screwdriver
95th
d. An office chair
50th
2. What is meant by control/display ratio?
It describes the relationship between the tool or control and what it accomplishes
3. Why use the use of a Phillips-head screw driver (or similar) and matching type screw instead of a conventional slotted screwdriver (and screw)?
It provides an improved fit between the tool and the fastner. Results in a low risk of injury from the tool slipping out of the socket.
4. Design handles for a bolt cutter that will not allow the user’s fingers to be pinched or hit when the cutter is closed
Needs to be insulated with offset handles or gripping jaws that allow the hand to be held in a natural position.
5. Define the term hazard.
A hazard is the presence of a risky situation or a condition that is a prerequisite for a mishap.
6. What is the purpose of preliminary hazard analysis?
The goal is to identify and eliminate hazards before they can become accidents, or losses, throughout the life cycle of the project or activity
7. Explain why experience and related expertise are so important when conducting a preliminary hazard analysis.
8. Why is cost-benefit analysis so critical as a part of hazard analysis and prevention?
9. Briefly, describe the following detailed hazard analysis methodologies: FMEA, HAZOP, HEA, FTA, TOR.
10. What is the most fundamental weakness of both FMEA and HAZOP and how can it be overcome?
11. Name five widely applicable hazard prevention strategies.
Design for minimum hazard (eliminate or reduce), provide safety devices, provide warning devices, provide special procedures, and terminate
1. When using anthropometric data to design tools and controls, what percentile data should be used for the following:
a. The opening in the handle of the of scissors or tin snips
50th
b. The height of an emergency stop button
5th
c. The handle of a large, heavy duty screwdriver
95th
d. An office chair
50th
2. What is meant by control/display ratio?
It describes the relationship between the tool or control and what it accomplishes
3. Why use the use of a Phillips-head screw driver (or similar) and matching type screw instead of a conventional slotted screwdriver (and screw)?
It provides an improved fit between the tool and the fastner. Results in a low risk of injury from the tool slipping out of the socket.
4. Design handles for a bolt cutter that will not allow the user’s fingers to be pinched or hit when the cutter is closed
Needs to be insulated with offset handles or gripping jaws that allow the hand to be held in a natural position.
5. Define the term hazard.
A hazard is the presence of a risky situation or a condition that is a prerequisite for a mishap.
6. What is the purpose of preliminary hazard analysis?
The goal is to identify and eliminate hazards before they can become accidents, or losses, throughout the life cycle of the project or activity
7. Explain why experience and related expertise are so important when conducting a preliminary hazard analysis.
8. Why is cost-benefit analysis so critical as a part of hazard analysis and prevention?
9. Briefly, describe the following detailed hazard analysis methodologies: FMEA, HAZOP, HEA, FTA, TOR.
10. What is the most fundamental weakness of both FMEA and HAZOP and how can it be overcome?
11. Name five widely applicable hazard prevention strategies.
Design for minimum hazard (eliminate or reduce), provide safety devices, provide warning devices, provide special procedures, and terminate