Ergonomics Lesson Question with Answer for class 7

 

2- ERGONOMICS

A. Fill in the blanks:

1. Anti-glare screens should be used to avoid eye strain.

2. An ergonomic keyboard and mouse are designed to minimize muscle strain.

3. Wrist rest can assist you maintaining a neutral position when used properly during pauses.

4. Elbows should be positioned at 100 to 110 degrees when working in order to keep a relaxed position at the keyboard.

5. Position your monitor to eliminate excessive glare or reflections from windows and lighting.

6. The monitor should be centered directly in front of you.

7. Eyes strain is caused by the glare of light.

8. Using a keyboard for a long time may cause strain on the wrists.

9. Avoid resting your elbows on the hard surface or edge of your table.

10. Customize your computer by using your software.

B. True or false:

1. While working on a computer, you should always sit straight. True

2. The lower part of the back must be supported by the chair. True

3. Anti- glare screen should be used to avoid eyes strain. True

4. Proper position of wrists is very important while using keyboard. True

5. An ergonomic keyboard is designed to minimize muscle strain. True

6. While working on a computer take a small break. True

7. An overall goal of ergonomic is to promote health. True

8. Placed your hands on a palm rest to avoid wrist strain. True

C. Answer the following questions:

1. What do you understand by ergonomics?

Ergonomics is the science of adapting the work environment to the needs of human s according to their physical structure. An overall goal of ergonomics is to promote health, safety and to optimise productivity.

2. Which parts of your body gets strained while working on a computer?

The parts of our body that get strained while working on a computer are Backache, Eyes, Feet, neck, and wrist etc.

3. How can you avoid eye strain while working on a computer?

To avoid eye strain while working on a computer we must follow the steps given below:

i) Use antiglare screens.

ii) Keep the monitor at proper distance from the eye.

iii) The brightness and contrast settings on the monitor should be adjust properly.

iv) The Source of light in the room should be behind the back of the user.

v) The monitor must be at a proper eye level.

4. Write five steps that makes you comfortable while working on a computer.

The given five steps will makes us comfortable while working on a computer:-

i) Using anti-glare screen will help us form strain that is caused by the glare of light.

ii) The height of the chair must be at proper level so that we can placed our feet comfortably on the floor or footrest.

iii) Using a proper chair with proper back support will reduce the chances of backache.

iv) Keeping our wrist flat on the surface of table or a palm rest of our keyboard.

v) Using an ergonomic keyboard and a mouse will help us minimize muscle strain and a host of related problems.

5. What is the right way of using your hands to operate a keyboard?

The right way to use our hand to operate a keyboard is by placing them on the surface of the table or the palm rest of our keyboard.

6. Explain the term ‘Ergonomic keyboard’.

An Ergonomic keyboard is a computer keyboard specially designed with ergonomic consideration to minimize muscle strain, fatigue, and other problems. It is designed to fit user, rather than having to adjust ourself to fit the keyboard.

7. Step to remember while working on a computer?

While working on a computer, we must take a small break to ease our hands, eyes, back and feet. We can stretch our body to loosen the muscles and also we must gently close our eyes for a minute or so.

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