CBSE Class 10/Overview
Curriculum 2026–27
Practice
All Revision Notes
Information TechnologyCh-20 12 min comprehensive revision
CBSE Class 10 IT (402) — Part B: Unit 4 (Maintain Working Environment)

Prevent Accidents & Emergencies

Handling workplace accidents and emergencies, emergency evacuation procedures, fire safety protocols (classes of fire, PASS extinguisher technique), electrical rescue methods, and First Aid administration.

Quick Key Takeaways:
Emergency Protocol: Notice & identify emergency → Raise alarm → Call emergency services (112/101/102/108) → Follow evacuation drill to designated Assembly Point.
Fire Extinguisher PASS Method: Pull the pin, Aim at the base of the fire, Squeeze the handle, Sweep side-to-side.
Jump to Concept:1. Handling Accidents & Incident Reporting2. Fire Safety Protocols & PASS Technique3. Electrical Rescue & First Aid
1

Handling Accidents & Incident Reporting

Emergency Action

Immediate steps to take when a workplace mishap or accident occurs.

• Immediate Actions
1. Attend to the injured person immediately without endangering yourself; 2. Call trained First Aider or medical emergency; 3. Inform supervisor and security; 4. Log accident in Incident Report Register.
• Common Workplace Accidents
Slip and fall on slippery floors, trip and fall over loose cables, falling objects from storage shelves, and minor cuts/burns.
2

Fire Safety Protocols & PASS Technique

Fire Safety

Understanding fire classification and proper extinguisher operation.

• Classes of Fire
Class A: Ordinary combustibles (wood, paper, cloth); Class B: Flammable liquids (petrol, oil, paint); Class C: Flammable gases (LPG, CNG); Class D: Combustible metals; Class E / Electrical: Electrical equipment and wiring (use CO2 or Dry Powder extinguisher, NEVER WATER).
• PASS Extinguisher Rule
P: Pull the safety pin; A: Aim the nozzle at the BASE of the fire; S: Squeeze the operating lever; S: Sweep the nozzle from side to side across the base.
3

Electrical Rescue & First Aid

First Aid

Life-saving emergency techniques during electrical shocks and medical crises.

• Electrical Shock Rescue
DO NOT touch the victim directly with bare hands while they are in contact with live current. Switch off main power source immediately or use a non-conductive object (dry wooden broom or rubber stick) to push victim away.
• First Aid ABC Rule
A: Airway (ensure clear breathing passage); B: Breathing (check for chest movement); C: Circulation (check pulse; perform CPR if breathing has stopped).
Authentic Board Question (3 Marks)Topic: Prevent Accidents & Emergencies LibreOffice Menu Path & Practical Workflow
Write the step-by-step practical procedure, menu path, and configuration settings in LibreOffice for "Prevent Accidents & Emergencies".

Official CBSE Step-by-Step Marking Breakdown:

Step 1: Exact Menu Navigation Pathway: State the precise menu sequence (e.g., Data -> Consolidate, Tools -> Scenarios, Format -> Styles and Formatting).
1 Mark
Step 2: Dialog Box Settings & Parameters: Specify the required input fields, source ranges, target cells, or style properties in the dialog window.
1 Mark
Step 3: Execution, Document Result & Shortcuts: Describe the resulting change in the document/sheet and provide the official keyboard shortcut (e.g., F11, Ctrl+F10).
1 Mark
Model Student Answer (Target: Full 3/3 Marks):
To score full 3 marks on "Prevent Accidents & Emergencies" in CBSE IT (402):

1. GUI Menu Pathway: Menu →\to Submenu →\to Tool Name... (e.g. Data →\to Consolidate).
2. Configuration Steps: In the dialog window, define source ranges, select the mathematical function or style attributes, and choose the output destination.
3. Application & Verification: Click OK to apply changes. Confirm the updated formatting, scenario switch, or consolidated summary.
Examiner Mark Deduction Traps:
•Always write menu paths using arrows: Main Menu -> Submenu -> Command.
•Mention standard shortcut keys where applicable to demonstrate practical lab mastery.

High-Frequency Conceptual Doubts & FAQs

Curated answers to the most common questions asked by Class 10 students.
This chapter establishes the foundational principles, definitions, and operational workflows required for Class 10 board mastery.

Next Learning Steps & Active Practice

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