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Maharashtra SSC Mechanical Technology Pre-Voc/NSQF study materials
Maharashtra SSC Mechanical Technology Pre-Voc/NSQF study resources

Maharashtra SSC Mechanical Technology Pre-Voc/NSQF: Safety Practices and Workshop Discipline

Maharashtra SSC Mechanical Technology Pre-Voc/NSQF · Work through your exam, one topic at a time.

All guide sections

Safety Practices and Workshop Discipline

This domain tests whether you can spot a hazard, select the right protective equipment and extinguisher, and describe safe working around machines, electricity and housekeeping.

Personal protection and machines

  • Eye protection is compulsory for chipping, grinding, drilling and any operation that throws chips.
  • Remove ties, watches, rings and loose sleeves near rotating machines. Gloves are never worn at a lathe, drill or pedestal grinder because they can be dragged into the rotating part.
  • Guards must be in position. Stop the machine before measuring, adjusting or cleaning. Never reach across a rotating job.
  • Clear chips with a hook or brush, never with bare hands or by blowing compressed air on clothes.
  • Remove the chuck key before switching on.

Fire and electrical safety

  • Fire triangle: fuel, oxygen, heat. Remove any one to extinguish.
  • Class A solids: water or foam. Class B flammable liquids: foam, CO2 or dry powder. Class C gas and electrical: CO2 or dry powder, never water. Class D metals: special dry powder.
  • Indian supply: 230 V single phase, 415 V three phase, 50 Hz. A fuse or MCB protects wiring; an ELCB or RCCB tripping at 30 mA protects people.
  • The earth conductor is green or green-yellow and is never used as a neutral.

Discipline and housekeeping

Practise 5S: sort, set in order, shine, standardise, sustain. Keep aisles clear, store oily rags in a closed metal bin, report every injury in the accident register, and know where the first-aid box and fire alarm are.

Worked example

An electric motor catches fire. Reasoning: the equipment is live, so isolate the supply first, then use CO2 or dry powder. Water or foam conducts electricity and could electrocute the operator, and also damages the winding. If isolation is impossible, use CO2 only and keep clear.

Traps that cost marks

  • Wearing gloves at a lathe.
  • Using water on an electrical or oil fire.
  • Removing chips by hand or with compressed air.
  • Leaving the chuck key in the chuck.
  • Using the earth wire as a neutral.