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