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Test your basic knowledge |
Engineering Studies
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Used where scarifical anodes cannot supply enough protection - offshore oil rigs - buried pipes - big things. protection is provided by connecting a rectifier to provide a direct current source between the anode and the metal being protected.
hot rolling
Hardening
Impressed current
Medium earth orbit
2. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.
Dry corrosion
Commutator
cold rolling
Tempering
3. Vertical
Uniform attack
Low earth orbit
sin
rectifier
4. Resulting from combined effect of stresses set up within the metal
stress corrosion
thermosetting polymers
AC motor
sin
5. Ma/vr
n
shear stress
High frequency
rectifier
6. Between 2000-35 -700km above the earth's surface.
Hardening
Medium earth orbit
ultra- high carbon steel
DC motor
7. X<1% silicon no graphite - has carbon/carbide. very brittle
Dry corrosion
AM
Medium earth orbit
white cast iron
8. Produces; harder - stronger and less ductile product
Laminated glass
manganese and silicon alloy
cold rolling
DC motor
9. Can be reflected of the ionosphere - 3 to 30 megahertz
wet corrosion/electrochemical corrosion
High frequency
shear stress
white cast iron
10. Forming of metal by compressive force above recrystallization point.
thermosoftening polymer
nickel alloy
forging
Geosynchronous orbit
11. Load/area
Brushes
closed die forging
stress
tungsten alloy
12. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.
Ultrasonic inspection
Commutator
nickel alloy
Kinetic energy
13. Good toughness and fatigue. high strength structures
Laminated glass
thermoset rubbers
nickel alloy
forging
14. Usually used together - strengthening and toughness
hot rolling
Mobiles
manganese and silicon alloy
Transistor
15. These have weaker secondary bonds which allow the stretching
thermosoftening polymer
thermoplastic rubbers
high carbon steel
Attenuation
16. Ma/vr x 100/1
Potential energy
n%
Normalising
nickel alloy
17. A solid state component made from three layers of semiconductor material that can amplify the strenght of an electric signal or act as an electronic switch
stress
AC motor
Kinetic energy
Transistor
18. A motor that is light - rugged and very reliable - runs on ac current and are more common in robotics. Can only run at a certain speed
Hardening
nodular graphite cast iron
modulation
AC motor
19. Elongation of grain flow in direction of rolling
Frequency modulation
Annealing
hot rolling
n
20. Area parallel to force
medium carbon steel
Normalising
shear stress
Frequency modulation
21. 1/2Xmass X velocity X velocity
cos
hot rolling
Kinetic energy
chromium alloy
22. A strong hard building material composed of sand and gravel and cement and water
medium carbon steel
Satellite
Concrete
Tempered Glass
23. Squeezing of the hot metal between two shaped dies excess is cut off
Laminated glass
Uniform attack
closed die forging
Transistor
24. 1GHZ
forging properties
Mobiles
Twisted pair cable
Brushes
25. A method of transmitting signals by changing the frequency of a wave
Dye penetration test
forging properties
Frequency modulation
thermoplastic rubbers
26. Hard - strong
stress corrosion
Dye penetration test
fibre optic cable
pearlite
27. An orbit less than 1 -500 km. above the Earth's surface.
manganese and silicon alloy
Low earth orbit
shear stress
Fluorescent test
28. Good wear - case hardening. ball bearings
chromium alloy
medium carbon steel
wet corrosion/electrochemical corrosion
thermosetting polymers
29. Better properties that would come from machining
thermosetting polymers
sin
High frequency
forging properties
30. A cable made of optical fibers that can transmit large amounts of information at the speed of light
pearlite
Radio antenna length
fibre optic cable
Geosynchronous orbit
31. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
Brushes
Commutator
n
nodular graphite cast iron
32. Allows for another signal to be sent along the carrier signal
modulation
Attenuation
tungsten alloy
nodular graphite cast iron
33. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
Annealing
chromium alloy
Tempering
Dry corrosion
34. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
Radiography
AC motor
DC motor
Transistor
35. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
Radiography
Tempered Glass
open die forging
Hardening
36. Softening a material such as metal by controlled heating and cooling. This makes the metal less brittle and more easily adaptable. Soaking till austenite then cooling slowly. large grains
Annealing
Low carbon steel
bending stress
nickel alloy
37. Results from the changing anode and cathode regions over the entire surface
Uniform attack
VR
Mobiles
AM
38. 1/4 of the wavelength (higher better)
Radio antenna length
forging properties
Potential energy
High frequency
39. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
Hardening
Magnetic inspection
if 100% efficient
chromium alloy
40. Us a metal that is more reactive. It is connect to another metal and corrodes instead of the other metal. the Anode is replaced periodically
Magnetic inspection
Low earth orbit
ferrite
Sacrifical anode
41. High pressure
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42. Field winding parallel to armature winding. Bad for direct coupling
DC motor
shear stress
cementite
MA
43. Difference/original
Tempering
pearlite
Attenuation
Strain
44. Mass X gravity X height
rectifier
tungsten alloy
closed die forging
Potential energy
45. Soaked cast iron at 870c for long time then cooled slow
High frequency
Attenuation
malleable cast iron
Strain
46. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.
Dry corrosion
Transistor
spalling concrete
open die forging
47. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles
bending stress
medium carbon steel
Tempering
modulation
48. An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time
Medium earth orbit
Geosynchronous orbit
stress corrosion
Mobiles
49. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
manganese and silicon alloy
Bernoulli's principle high speed
grey cast iron
Radiography
50. Soft - ductile
nickel alloy
Attenuation
Radio antenna length
ferrite
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