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Questions and Answers
What is the definition of safety?
The state of being protected against physical harm, failure, damage, error or accidents.
Which of the following organizations issues safety laboratory standards? (Select all that apply)
Employers are responsible for providing Personal Protective Equipment (PPE) for employees.
True
What should you do if you see an accident at the workshop?
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What type of footwear is suitable for the workshop?
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Always wear an apron as it will protect your ______.
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What should you do with bags in the workshop?
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It is safe to use a machine if you have not been shown how to operate it safely.
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What is necessary for parts to fit together as intended?
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What are the purposes of measuring tools?
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What are the two scales used in Vernier instruments?
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The fixed scale of a Vernier instrument has divisions that represent varying lengths.
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How many equal parts does the Vernier scale consist of?
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A dial indicator magnifies small movements of a ______.
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What common instrument type is used to check straightness and alignments?
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What is the most common type of plunger-type instrument?
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What can slight damage to a dial indicator mechanism lead to?
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Match the following measuring devices with their primary function:
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Study Notes
Health and Safety at Work
- Safety is the state of being protected from physical and other consequences of failure, damage, error, or accidents.
- Safety is also defined as controlling recognized hazards to reach an acceptable level of risk.
- Employers are responsible for identifying hazards in the workplace, providing PPE, training employees, maintaining PPE, and reviewing its effectiveness.
Safety Standards in Labs and Workshops
- Organizations issuing safety laboratory standards:
- International Standardization Organization (ISO)
- International Safety Equipment Association (ISEA)
- American Society of Testing of Materials (ASTM)
- International Electrotechnical Commission (IEC)
- British Standards Institution (BSI)
- Laser Institute of America (LIA)
- Standards Australia (SAI)
- American Industrial Hygiene Association (AIHA)
- Application fields include:
- Clinics
- Labs
- Workshops
- Educational facilities
Personal Protection Equipment (PPE)
- Eye and Face Protection: protects from sparks, dust, and chemicals.
- Head Protection: hard hats protect from falling objects, impact, and electrical shock.
- Foot Protection: safety shoes protect feet from injury from falling objects, sharp objects, and electrical shock.
- Hand Protection: gloves protect hands from cuts, abrasions, and chemical exposure.
- Ear Protection: earplugs and earmuffs protect hearing from loud noises.
Safety Managements
- Employers are responsible for assigning supervisors to train personnel on proper wear, use, cleaning, maintenance, care, and storage of PPE.
- Supervisors report the need to repair or replace PPE.
Safety Notes in the Workshop
- Always listen carefully to instructions and follow them.
- Do not run in the workshop, to avoid bumping into others and causing an accident.
- Know the location of emergency stop buttons to shut down machines.
- Always wear an apron to protect clothes and hold loose clothing in place.
- Always wear strong shoes.
- Tools should be put away when not in use.
- Never bring bags into the workshop as people could trip over them.
- Listen to all instructions before using a machine.
- Never use a machine if you haven't been shown how to use it safely.
- Be patient and never rush.
- Always use a guard when working on a machine.
- Keep hands away from moving/rotating machinery.
- Use hand tools carefully, keeping both hands behind the cutting edge.
- Report any damage to machines or equipment to prevent accidents.
Measuring Devices Introduction
- Accurate measurement is crucial for ensuring parts fit together correctly, regardless of where they were made.
- Measuring tools must be manufactured to a standard and used correctly.
Vernier Instruments
- Vernier instruments consist of a fixed scale and a moving vernier scale.
- The vernier scale is divided into 50 parts that occupy the same length as 49 divisions on the fixed scale.
- The fixed scale is graduated in millimeters with 10 divisions representing 10 millimeters.
- Each division on the vernier scale represents 0.02 millimeters.
- To read a vernier instrument, see how many millimeters the zero on the vernier scale is from the zero on the fixed scale and then find the vernier scale division that coincides with a line on the fixed scale.
Types of Measuring Devices
-
Vernier Devices:
- Vernier caliper (dial & electronic)
- Vernier height gauge
- Vernier depth gauge (dial & electronic)
- Vernier bevel protractor
-
Micrometers:
- External micrometer
- Depth micrometer
- Electronic external micrometer
- Direct reading digital depth micrometer
-
Dial Indicators:
- Magnify small movements using a graduated dial.
- Used for checking dimensional accuracy, straightness, alignment, and setting workpieces.
- Plunger-type instruments are common and use a rack and gear system to magnify movement.
- Lever-type instruments have a smaller range than plunger-type instruments.
Dial Indicator Applications
- Used in conjunction with gauge blocks to check dimensional accuracy.
- Used to assess straightness and alignments on machines and equipment.
- Help set workpieces in machines to achieve parallelism and concentricity.
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Description
Test your knowledge on health and safety practices in various workplace settings. This quiz covers essential safety standards, responsibilities of employers, and recognized hazards in labs and workshops. Perfect for students and professionals seeking to enhance their understanding of workplace safety protocols.
