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