# 1. When we deform a material and it recovers its original shape, we say that it is a) Rigid

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1 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: A DATE: / / 1. When we deform a material and it recovers its original shape, we say that it is 2. When we try to deform a material and it doesn t change its shape, we say that it is 3. Structures formed by cables, suspenders and sometimes sturdy supports that act as supporting elements are called... a) Mass s c) Suspended s b) Truss s d) Frame s 4. Structures formed by solid, heavy and sturdy materials that act as supporting elements are called... a) Mass s c) Suspended s b) Truss s d) Frame s 5. We can make a body more stable by a) Adding U-shaped sections b) Making it out of a harder material 6. What is the definition of stress? c) Making it out of a tougher material d) Widening its base 7. Indicate the type of stress that the elements shown with arrows are withstanding. 8. Give two representative examples of each of all the types of s based on elements seen in the class and describe the elements they are consisting on: Type of Elements that form the Main stress in the 2 examples (constructions or objects)

2 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: A DATE: / / 9. Fill in the blanks below: foundation s triangle Braces anchored shape material strength sections centre of gravity stable stay cables forces widening Structures need to be strong, i.e. they must be rigid, in equilibrium and. The of a depends on: The types of applied and the points where they act. The of the and the elements that form it, as well as the type of that they are made from. How do we obtain strong? By making them more stable. o By the base (supporting surface) of the o By locating the of the at a low point o By making a good for the o By supporting the with By making them more rigid. We can add strengthening elements to the like: o diagonals and bars: It works because the is the only figure that cannot be deformed. o are parts that are positioned diagonally between two bars to connect them by forming a right angle o stays or cables. They help support the tensile stresses in other components of a by distributing the weight to the supports or the terrain where they are. o for beams and columns. 10. Fill up the following table with the name of the stress that matches with the drawing, explain in what it consists and give one example of each: Drawing Stress (name and explanation) Example

3 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: B DATE: / / 1. When we deform a material and it recovers its original shape, we say that it is 2. The resistance of a material to break when it is being hit it is called... a) Toughness c) Hardness b) Stability d) Brittleness 3. Structures formed by bars,struts and joints that act as supporting elements are called... a) Mass s c) Suspended s b) Truss s d) Frame s 4. Structures formed by panels or sheets (sometimes attached to a very light ) that act as supporting elements are called... a) Mass s c) Frame s b) Truss s d) Shell s 5. We can make a body more rigid by a) Adding bars to triangulate (truss) its. b) Adding braces c) Adding stay cables d) All of the above 6. What is the definition of force? And the definition of strength of a material? 7. Indicate the type of stress that the elements shown with arrows are withstanding.

4 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: B DATE: / / 8. Fill up the following table with the name of the stress that matches with the drawing, explain in what it consists and give one example of each Drawing Stress (name and explanation) Example 9. Give two representative examples of each of all the types of s based on elements seen in the class and describe the elements they are consisting on: Type of Elements that form the Main stress in the 2 examples (constructions or objects)

5 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: CD DATE: / / 1. When we deform a material and it stays deformed, we say that it is 2. The resistance of a material to being scratched or pierced is called... a) Toughness b) Stability c) Hardness d) Brittleness 3. Structures formed by columns and beams that act as supporting elements are called... a) Mass s b) Truss s c) Suspended s d) Frame s 4. Write under the drawings the respective name of the stresses applied on the elements: 5. Draw the 4 types of open sections and the 3 types of closed sections seen in this unit: Open sections L-shaped T-shaped U-shaped H-or I-shaped Open sections Square section triangular section circle section

6 UNIT 05 TEST TECHNOLOGY 1º ESO GROUP: CD DATE: / / 6. What is the definition of? 7. Give two representative examples of each of all the types of s based on elements seen in the class and describe the elements they are consisting on: Type of Elements that form the Main stress in the 2 examples (constructions or objects) 8. Indicate the type of stress that the elements shown with arrows are withstanding.

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