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Test your basic knowledge |
Basic Matter
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 37 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The ability of a material to withstand pulling forces
Stiffness
Plastics
Thermal expansion
Tensile strength
2. The smallest part of an element that can exist chemically
classification of polymeric
Atom
Van der Waals bond
Ceramics
3. The resistance a material offers to penetration of scratching
Compound
Hardness
Thermal conductivity
Covalent bond
4. A force of attraction between particles
Pure substance
Bond
Molecule
Hardness
5. A substance formed by the combination of elements in fixed proportions
Covalent bond
Ceramics
Compound
Ductility
6. 1) Ferrous metals and alloys (irons - carbon steels - alloy steels - stainless steels - too and die steels) 2) nonferrous metals and alloys (aluminum - copper - magnesium - nickel - titanium - precious metals - refractory metals - super alloys)
Metal
Density
Timber
classification of Metals
7. Thermosets and thermoplastics
Density
Bond
Plastics
Toughness
8. Fixed volume but take the shape of their container
Metallic bonding
liquid state
Timber
Compound
9. V = IR (V= voltage - I = current - R = resistance). unit - Ohms
OHMS Law
Timber
gaseous state
liquid state
10. Formed when the fluctuating electrostatic charge in adjacent atoms of different molecules produces a weak electrostatic force between the molecules. Also present as a secondary bond between the long- chain molecules of polymers.
Tensile strength
liquid state
Van der Waals bond
Electrical resistivity
11. The ability of a material to resist the propagation of cracks
Toughness
Density
Thermal conductivity
Plastics
12. Mass per unit volumn of a material (D = M/V) unit : kg/m3
Element
classification of Composites
Thermal expansion
Density
13. Bond that shares electrons in order to complete part- filled shells
liquid state
OHMS Law
Covalent bond
Solid state
14. Natural wood and manmade
Timber
Van der Waals bond
Metal
Secondary bond
15. A mixture that contains at least one metal. This can be a mixture of metals or a mixture of metals and non - metals
Density
Alloy
Plastics
Ion
16. Vegetable and meat origin
classification of Ceramics
Electrical resistivity
Plastics
Food
17. Bond between adjacent oppositely charged ions
Van der Waals bond
Molecule
Bond
Ionic bond
18. A substance made of two or more substances that can be separated by physical means - ie not chemically bonded together
Density
Ductility
Mixture
Electrical resistivity
19. Ferrous and non - ferrous
Atom
Metal
Solid state
Pure substance
20. A positively or negatively charged atom or molecule caused by he loss or gain of electrons from an atom or atoms
Composite
Hardness
Ion
Atom
21. Fixed volume and fixed shape
Electrical resistivity
Atom
Solid state
Ion
22. Two or more atoms which are normally bonded together covalently
Van der Waals bond
Element
Molecule
Toughness
23. A measure of the degree of increase in dimension when an object is heated. This can be measured by an increase in the length (m) - area (m2) or volume (m3). The expansivity can be measured as a fractional increase in dimension per Kelvin increase in
Thermal expansion
classification of polymeric
Density
Mixture
24. The resistance of an elastic body to deflection by an applied force
Bond
Metallic bonding
Stiffness
Atom
25. Caused by an attraction between the positively charged metal atom nuclei and the negatively charged cloud of free electrons. Free electron allows metals to be a good thermal and electrical conductors and let the bond not fixed in position
Metallic bonding
Density
Van der Waals bond
classification of Composites
26. Earthenware - porcelain - stoneware and glass
classification of polymeric
Ionic bond
Ceramics
Atom
27. No fixed volume and no fixed shape
classification of Ceramics
Pure substance
gaseous state
Compound
28. A mixture composed of two or more substances (materials) with one substance acting as the matrix or glue
Metal
Ductility
Molecule
Composite
29. The ability of a material to be drawn or extruded into a wire or other extended shape.
Plastics
Element
Ductility
Ceramics
30. 1) glasses 2) glass ceramics 3) Graphite 4)Diamond
Compound
Solid state
classification of Ceramics
Secondary bond
31. 1) Thermoplastics plastics 2) Thermoset plastics 3) Elastomers
classification of Ceramics
classification of polymeric
Density
Secondary bond
32. Hydrogen bond - van der Waals bond
classification of Ceramics
Secondary bond
Composite
Electrical resistivity
33. This is the measure of a material's ability to conduct electricity. lower resistivity conducts electricity well
liquid state
Electrical resistivity
Pure substance
Hardness
34. A measure of how fast heat is conduct through a slab of material with a given temperature difference across the slab. Unit: W/m C (W = watts - m = metres - C = Celsius)
Electrical resistivity
Thermal conductivity
Mixture
Bond
35. 1)reinforced plastics 2)Metal- matrix composites 3)Ceramic- matrix composites 4)sandwich structures 5)concrete
classification of Composites
classification of Metals
Covalent bond
Thermal expansion
36. A substance that cannot be decomposed into simpler substances
Composite
Pure substance
Element
classification of polymeric
37. A substance made of only one element or compound
Pure substance
Toughness
Metal
Van der Waals bond