Mechanical, Electronic and Electrical Engineering

__________ engineering is a branch of engineering which combines engineering physics and mathematics with materials science. This helps to design, analyse, manufacture, and maintain mechanical systems.

​ (a)   are a toothed wheel that works with another wheel to change the speed of a driving mechanism (for example, the engine of a vehicle) and the speed of the driven parts.

• Gears
• Hydraulics
• Pulleys

​ (a)   are simple machines that help lift heavy objects more easily. They have a wheel and a rope, and when you pull the rope, it helps you move or lift objects by spreading the effort over multiple ropes.

• Hydraulics
• Pulleys
• Gears

​ (a)   is a mechanical function that operates by introducing pressure to a liquid.

In these systems, mechanical movement is produced by, pumping liquid (oil), usually through cylinders to move pistons.

• Hydraulics
• Gears
• Pulleys

Organize these options into the right categories

Groups:

(a) Uses Gears

,

(b) Uses Pulleys

,

(c) Uses Hydraulics

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Organize these options into the right categories

Groups:

(a) Gears

,

(b) Pulleys

,

(c) Hydraulics

• 
• Transmits and amplifies forces through Pascal's Principle

• Rotational motion

• 
• Reduces the effort needed to lift heavy objects

• Amplifies rotational power

• Uses pistons pushed by fluid pressure

• 
• Distributes the weight lifted over many ropes, reducing the force needed to lift

• Use toothed wheels

• Used in machines to change direction, speed and force of movement

• Uses fluid (usually oil) to transmit force and energy

• Uses ropes and wheels

A pulley system is used to change the speed of driven parts

• True

• False

Which of the following liquids is usually used in hydraulic systems?

• Water

• Oil

• Petrol

_______engineering is a discipline which studies the design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism.

AC current refers to ​ (a)   and is a type of electrical current. The direction the electrons flow ​ (b)   . It has ​ (c)   voltage than DC current.

• alternating current
• changes back and forth
• direct current
• in one direction
• higher
• lower
• alternative current
• directional current
• the same