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Workshop / Occupational Safety

Basic Science & Engineering · Safety, Environment & IT

Useful for: Railway RRB

Overview

Workshop safety uses protective equipment, safe procedures, signs and good housekeeping to prevent accidents.

Key points

PPE: helmet, safety goggles, gloves, ear protection, safety shoes.
Machine guards must stay in place during operation.
Lift with bent knees and a straight back.
Safety sign colours: red — prohibition, blue — mandatory, yellow — warning, green — safe condition.
Keep floors clean and tools in their places.

Explanation

Report unsafe conditions immediately.
Never wear loose clothing near rotating machines.
Know the location of first-aid kits and emergency exits.
Use the right tool for the job.

Step by step

Identify the concept, tool or rule involved.
Recall the definition, value or procedure.
Check units, safety logic and the direction of the effect.

Examples

A blue circular sign indicates → a mandatory instruction.
Correct lifting posture → bend the knees, keep the back straight.
Eyes are protected from flying chips by → safety goggles.

Traps and advanced points

Trap: Removing guards to work faster.
Trap: Lifting with a bent back.
Trap: Mixing sign colours.

Quick revision

PPE list.
Red prohibit, blue must, yellow warn, green safe.
Bend knees to lift.

Practice MCQs

The genetic material in most organisms is what?
1. ATP
2. DNA
3. Glucose
4. Cellulose
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Answer: (b) DNA. The genetic material in most organisms is DNA.
What is the SI unit of energy?
1. ampere
2. newton
3. joule
4. watt
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Answer: (c) joule. Joule is the SI unit of energy.
Which gas is released at the anode during electrolysis of acidified water under typical conditions?
1. Nitrogen
2. Oxygen
3. Hydrogen
4. Carbon dioxide
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Answer: (b) Oxygen. Oxygen is released at the anode during electrolysis of acidified water under typical conditions.
Which fire extinguisher is suitable for an electrical fire
1. Soda-acid
2. Water
3. Carbon dioxide (CO₂)
4. Wet sand mixed with water
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Answer: (c) Carbon dioxide (CO₂). Water conducts electricity and is dangerous on live equipment.
In standard safety signs, a blue circular sign indicates
1. a mandatory action
2. a prohibition
3. a warning
4. a safe condition
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Answer: (a) a mandatory action. Red prohibits, yellow warns and green shows safe conditions.
The first step in helping a person who has received an electric shock is to
1. pour water on the person
2. switch off the power supply
3. pull the person with bare hands
4. give them a drink
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Answer: (b) switch off the power supply. Touching the person while the supply is on can shock the rescuer.