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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. A substance formed by the combination of elements in fixed proportions
Compound
Atom
Ionic bond
Solid state
2. The resistance of an elastic body to deflection by an applied force
classification of Metals
Food
Stiffness
Thermal expansion
3. 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
Toughness
Secondary bond
Electrical resistivity
Thermal expansion
4. A mixture composed of two or more substances (materials) with one substance acting as the matrix or glue
Electrical resistivity
Density
Composite
Tensile strength
5. 1)reinforced plastics 2)Metal- matrix composites 3)Ceramic- matrix composites 4)sandwich structures 5)concrete
Ionic bond
classification of Composites
Food
Thermal expansion
6. A substance that cannot be decomposed into simpler substances
classification of polymeric
Plastics
Metallic bonding
Element
7. Ferrous and non - ferrous
Stiffness
Atom
Metal
gaseous state
8. Natural wood and manmade
Ion
Food
Timber
Solid state
9. The ability of a material to resist the propagation of cracks
classification of polymeric
Plastics
Toughness
Tensile strength
10. 1) glasses 2) glass ceramics 3) Graphite 4)Diamond
Plastics
Pure substance
classification of Ceramics
Van der Waals bond
11. Thermosets and thermoplastics
Plastics
gaseous state
Metal
Density
12. Vegetable and meat origin
Food
Compound
gaseous state
Timber
13. V = IR (V= voltage - I = current - R = resistance). unit - Ohms
classification of polymeric
Ion
OHMS Law
Ceramics
14. 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)
classification of Metals
OHMS Law
gaseous state
Toughness
15. Bond that shares electrons in order to complete part- filled shells
Stiffness
Ion
Covalent bond
Tensile strength
16. Two or more atoms which are normally bonded together covalently
OHMS Law
Tensile strength
Molecule
Timber
17. A positively or negatively charged atom or molecule caused by he loss or gain of electrons from an atom or atoms
Ion
Atom
Element
Toughness
18. Fixed volume but take the shape of their container
Pure substance
Solid state
Ductility
liquid state
19. No fixed volume and no fixed shape
Thermal expansion
gaseous state
Bond
Covalent bond
20. 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.
Composite
classification of polymeric
Van der Waals bond
OHMS Law
21. This is the measure of a material's ability to conduct electricity. lower resistivity conducts electricity well
gaseous state
Food
Thermal conductivity
Electrical resistivity
22. Earthenware - porcelain - stoneware and glass
Ion
Ceramics
classification of Composites
Ductility
23. A force of attraction between particles
Timber
Bond
liquid state
classification of Metals
24. Fixed volume and fixed shape
classification of Ceramics
Tensile strength
Solid state
Ionic bond
25. The ability of a material to be drawn or extruded into a wire or other extended shape.
Ductility
Plastics
Ionic bond
classification of Ceramics
26. A substance made of only one element or compound
Pure substance
Solid state
Molecule
classification of Metals
27. 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)
Ion
Metallic bonding
Toughness
Thermal conductivity
28. Mass per unit volumn of a material (D = M/V) unit : kg/m3
Density
classification of Composites
Covalent bond
Plastics
29. Hydrogen bond - van der Waals bond
Secondary bond
Van der Waals bond
classification of Metals
Solid state
30. The ability of a material to withstand pulling forces
Toughness
Solid state
Tensile strength
Alloy
31. 1) Thermoplastics plastics 2) Thermoset plastics 3) Elastomers
liquid state
Pure substance
classification of polymeric
Ductility
32. A substance made of two or more substances that can be separated by physical means - ie not chemically bonded together
Secondary bond
Mixture
Toughness
Composite
33. The smallest part of an element that can exist chemically
Tensile strength
Ceramics
Hardness
Atom
34. A mixture that contains at least one metal. This can be a mixture of metals or a mixture of metals and non - metals
Alloy
Molecule
Timber
Element
35. Bond between adjacent oppositely charged ions
gaseous state
OHMS Law
Pure substance
Ionic bond
36. The resistance a material offers to penetration of scratching
Hardness
Mixture
Density
liquid state
37. 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
Atom
Hardness
Metallic bonding
Thermal conductivity