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