Tech 1

Question 1

In the figure of a hydaulic system, the 2 syringes are different sizes.

The syringe on the left is 20ml and the syringe on the right is 10ml.

1. If you pressed the plunger of Syringe A down, explain what would happen to the plunger of Syringe B (use the words input force and output force)
2. What would happen if Syringe B was 40ml in size?

Answer 1

1. The output force of Syringe B would be less than the input force being applied to Syringe A.
2. The output force of Syringe B would be more than the input force being applied to Syringe A.

Question 2

For each picture below, identify:

• the class of lever
• the effort (1, 2 or 3)
• the fulcrum (1, 2 or 3)
• the load (1, 2 or 3)

Answer 2

a) nutcracker:

• second-class lever
• effort = 1
• fulcrum = 3
• load = 2

b) tweezers

• third-class lever
• effort = 2
• fulcrum = 3
• load = 1

c) scissors

• first-class lever
• effort = 1
• fulcrum = 2
• load = 3

Question 3

Look at the drawing of the cell phone tower and answer the questions that follow:

1. What 2 methodss of strengthening can you identify that have been used in this design of a cell phone tower?

Answer 3

1. Triangulation
2. Tubing

Question 4

Look at the drawing of the cell phone tower and answer the questions that follow:

1. What type of structure is this cell phone tower?

Answer 4

1. Frame structure

Question 5

Look at the photograph of an emergency shelter.

1. Name 4 features of this emergency shelter.

Answer 5

1. It is high enough for an adult to stand up in it.
2. The shape of the tent makes that rain will fall off it well and wind will blow around it.
3. It is lightweight, so it is easy to transport.
4. It is easy to errect and take down.

Question 6

Look at the drawing of the cell phone tower and answer the questions that follow:

1. What is the purpose of this tower?

Answer 6

1. To support the cell phone signal devices.

Question 7

Look at the drawing of the cell phone tower and answer the questions that follow:

1. Do you think this tower is stable? Give a reason.

Answer 7

1. Yes. The base-size is wider than the top of the tower.

Question 8

In a hydraulic system, what would happen to the input force and the output force if the syringes were exactly the same size?

Answer 8

The input force and the output force would be exactly the same.