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Saturday, November 22, 2025

Health and Safety at Workplace-Class-10-Part:B-Unit:4-Ch:3:

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CBSE SOLUTIONS-2025-26
CLASS-10-PART-B
unit-4 Managing Health and Safety

chapter- 3 Health and Safety at the workplace

A. Fill in the Blanks
1.The screen must be free of ________ to avoid discomfort to the user.
Answer: glare
2.Removing rings, watches, and necklaces when working on the computer to avoid damage from ________ electricity is important.
Answer: static
3.A ________ backup system provides the system with constant voltage during power outages.
Answer: UPS (Uninterruptible Power Supply)
4.To prevent ________, take a break every 30 minutes and look at something 30 m away for 30 seconds.
Answer: eye strain


B. Multiple Choice Questions (MCQ)
1.Which of the following is not recommended to reduce eye strain when using a computer?
A) Adjusting the brightness of the screen
B) Positioning the screen to avoid glare
C) Keeping the screen clean
D) Keeping the screen at a fixed distance of 10 inches
Answer: D) Keeping the screen at a fixed distance of 10 inches
2.What is the minimum recommended distance to keep your monitor from your face?
A) 10–15 inches
B) 15–20 inches
C) 18–24 inches
D) 25–30 inches
Answer: C) 18–24 inches
3.How should you prevent electrical hazards when cords become exposed?
A) Coarse electrical tape
B) HR tape
C) Insulating tape
D) Reflective tape
Answer: C) Insulating tape
4.Which syndrome is associated with repetitive strain from computer use?
A) Carpal Tunnel Syndrome
B) Tennis Elbow
C) Frozen Shoulder
D) Rotator Cuff Syndrome
Answer: A) Carpal Tunnel Syndrome

C. Short Answer Questions
1.What are two major adjustments to make when setting up a workstation to prevent musculoskeletal problems?
Answer:
Adjust the chair height so feet stay flat on the floor.
Keep the monitor at eye level to avoid neck strain.
2.What are the potential hazards associated with loose cords and wires in a workstation?
Answer:
Loose wires can cause tripping, falling, and may lead to electrical shocks or fire hazards.


D. Long Answer Questions

Q1. Describe the health and safety requirements for an ergonomic computer workstation including consideration for the display screen.
Answer:
1️⃣ Correct Sitting Posture
The user should sit with a straight back and relaxed shoulders. The lower back must be supported by the chair to avoid back pain and discomfort.
2️⃣ Proper Chair Adjustment
The chair should be adjustable in height
Feet must rest flat on the floor
Elbows should remain at a 90° angle while typing
3️⃣ Display Screen Position
The monitor should be directly at eye level
Keep the screen at a distance of 18–24 inches (45–60 cm)
The screen must be free from glare and reflections
Text size should be easily readable
4️⃣ Correct Placement of Keyboard and Mouse
Keyboard should be close to the user
Wrists should remain straight, not bent
Mouse should be within easy reach
5️⃣ Proper Lighting and Workspace
Lighting should not be too bright or too dim
Avoid reflection from windows or strong light
Keep the workstation neat and free of loose wires
6️⃣ Regular Breaks and Movement
Short breaks should be taken every 30–40 minutes
Light stretching helps prevent muscle fatigue

Q2. What measures can be taken to reduce the risk of eye strain and visual fatigue when using a computer?
Answer:
1️⃣ Follow the 20-20-20 Rule
Every 20 minutes, look at something 20 feet away for 20 seconds to relax the eye muscles.
2️⃣ Maintain Proper Screen Distance and Angle
Monitor should be 18–24 inches away from the eyes
The top of the screen should be at eye level
Do not bend the neck while viewing the screen
3️⃣ Adjust Display Settings
Set brightness and contrast to a comfortable level
Use anti-glare filter if needed
Keep the screen clean and dust free
4️⃣ Blink Frequently
Blinking helps prevent dry eyes and irritation caused by long screen use.
Eye drops may be used with doctor advice.
5️⃣ Good Lighting in the Room
Avoid direct sunlight on the screen
Avoid harsh reflections and shadows
6️⃣ Maintain Proper Posture
A correct sitting position supports relaxed viewing and reduces eye stress.



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