Maintenance and Care of Machines

Q.

List four steps to be taken for proper care of machines.

Q.

Choose The Most Appropriate Answer Where Is Bob ?-He -------------- His Car In The Garage

1. fixes

2. is fixing

3. has fixed

4. fixed

Q. Write down four or five ways to maintain a machine.

Q.

Mention the advantage of using grease in the axle of a bicycle.

Q.

Regular oiling and polishing increase the life of a machine.

1. True
2. False

Q. Which of the following would prevent a machine from rusting?

1. Keeping the machine in sunlight
2. Painting the machine
3. Washing the machine with water
4. Cleaning the machine with a sand paper

Q. To reduce friction, the movable parts of machines must be periodically ________.

1. lubricated
2. (b) and (c) above.
3. washed
4. painted

Q.

machine parts has to be oiled regularly . give reason?

Q.

Lubrication helps in ___ the friction

Q. To reduce friction, the movable parts of machines must be periodically ________.

Q.

Which of the following statements about a lubricant is correct?

1. A lubricant is used to increase friction.

2. A lubricant is used to reduce friction.

3. A lubricant is used to increase the heat between two surfaces.

4. A lubricant is used to reduce the heat between two surfaces.

Q. To reduce friction, the movable parts of machines must be periodically

1. scraped
2. lubricated
3. painted
4. washed