Machines

Question 1

Machines are objects that we use to save time and energy.

Answer

true

Question 2

There are two kinds of machines by their complexity: simples or complex.

Answer

true

Question 3

The machines never use a person´s energy.

Answer

true

Question 4

The machines can use wind or water energy.

Answer

true

Question 5

Many machines use electricity or electrical current.

Answer

true

Question 6

The most of cars need combustible fuel to work. It's the energy for them.

Answer

true

Question 7

Wheels, pulley are complex machines.

Answer

true

Question 8

Mechanical machines are used to lift light objects but we don't use that to produce movement.

Answer

true

Question 9

Machines make the work harder for workers.

Answer

true

Question 10

We can find two kinds of mechanical machines: Manual and Automatic.

Answer

true

Question 11

Machines make our life easier in the communication.

Answer

true

Question 12

The structure of a machine is the skeleton of the machine.

Answer

true

Question 13

The housing doesn't protect the machine.

Answer

true

Question 14

Automatic machines that produce movement have a motor engine.

Answer

true

Question 15

Electrical circuits and electronic circuits direct the energy to the motor and other parts.

Answer

true

Question 16

Sensors don't enable the machine to receive information from the outside or inside of the machine.

Answer

true

Question 17

An antenna isn't a sensor.

Answer

true

Question 18

Indicators and screen give us information about how the machine is functioning.

Answer

true

Question 19

Operating parts are the moving pieces os a mechanical machine.

Answer

true

Question 20

Wheels and axles aren't an operating parts.

Answer

true

Question 21

Gears don't need teeth or cogs to transmit movement.

Answer

true

Question 22

Machines can do the work of more than one person at once.

Answer

true

Question 23

Modern transportation allows us to travel far away.

Answer

true

Question 24

The combustible fossil in different types of transportation is perfect for the environment.

Answer

true

Question 25

Machines haven't done advances in health.

Answer

true

Machines

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