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