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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. Supply current to the rotating commutator from an external source
Brushes
manganese and silicon alloy
sin
Bernoulli's principle high speed
2. The greater the sulphur the harder the rubber to stretch
Fluorescent test
pearlite
Impressed current
thermoset rubbers
3. 10MHZ
spalling concrete
Low earth orbit
nickel alloy
FM
4. 1%<X<2% carbon. more cementite - used for files
sin
ultra- high carbon steel
white cast iron
Bernoulli's principle high speed
5. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering
Low earth orbit
Bernoulli's principle low speed
Laminated glass
Attenuation
6. Low pressure
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7. AC to DC
rectifier
Attenuation
sin
Normalising
8. 1/2Xmass X velocity X velocity
Satellite
Attenuation
bending stress
Kinetic energy
9. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
Medium earth orbit
Sacrifical anode
grey cast iron
AC motor
10. Soaked cast iron at 870c for long time then cooled slow
Uniform attack
elastomers=what
malleable cast iron
white cast iron
11. Good wear - case hardening. ball bearings
chromium alloy
Frequency modulation
sin
drop forging
12. 1/4 of the wavelength (higher better)
Hardening
Geosynchronous orbit
Radio antenna length
thermosetting polymers
13. These have weaker secondary bonds which allow the stretching
Transistor
thermoplastic rubbers
Tempering
Sacrifical anode
14. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear
high carbon steel
thermosetting polymers
manganese and silicon alloy
bending stress
15. 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.
ultra- high carbon steel
thermoset rubbers
Impressed current
Normalising
16. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains
Low carbon steel
if 100% efficient
Normalising
nodular graphite cast iron
17. Elongation of grain flow in direction of rolling
drop forging
hot rolling
Ultrasonic inspection
nickel alloy
18. 100GHZ+
mild steel
sin
Satellite
Laminated glass
19. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures
Tempered Glass
mild steel
n%
Laminated glass
20. Being forced - under pressure - through a hole like toothpaste. either hot or cold
Strain
extrusion
chromium alloy
if 100% efficient
21. Rubbers
white cast iron
extrusion
elastomers=what
stress corrosion
22. The quantity of information that can be transmitted through a communication medium in a given amount of time.
Bandwidth
stress corrosion
Strain
fibre optic cable
23. Area parallel to force
Strain
fibre optic cable
n
shear stress
24. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
drop forging
Amplitude modulation
Tempering
Potential energy
25. MA=VR
if 100% efficient
Strain
Annealing
Commutator
26. Good toughness and fatigue. high strength structures
nickel alloy
Sacrifical anode
white cast iron
malleable cast iron
27. Can be reflected of the ionosphere - 3 to 30 megahertz
tungsten alloy
High frequency
manganese and silicon alloy
Low earth orbit
28. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
wet corrosion/electrochemical corrosion
cos
ferrite
Hardening
29. Hard - strong
Normalising
Attenuation
Strain
pearlite
30. High pressure
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31. Solid at room temp - weak secondary bonds. can be reheated multiply times.
MA
high carbon steel
thermosoftening polymer
Commutator
32. Maximum bending moments X distance to natural axis/ second moment of area
Low earth orbit
Bernoulli's principle low speed
extrusion
bending stress
33. Ma/vr x 100/1
malleable cast iron
n%
n
stress corrosion
34. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies
Medium earth orbit
Attenuation
Bernoulli's principle high speed
nodular graphite cast iron
35. Usually used together - strengthening and toughness
nickel alloy
Twisted pair cable
thermoset rubbers
manganese and silicon alloy
36. Vertical
sin
Strain
Geosynchronous orbit
Magnetic inspection
37. 1GHZ
Hardening
n
Mobiles
thermosetting polymers
38. A flexible communications cable that contains pairs of insulated copper wires that are twisted together for reduction of EMI and RFI and covered with an outer insulating jacket.
Twisted pair cable
Tempering
Bandwidth
open die forging
39. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
Strain
grey cast iron
thermosetting polymers
Tempered Glass
40. Results from the changing anode and cathode regions over the entire surface
Concrete
modulation
Low earth orbit
Uniform attack
41. 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
n%
Amplitude modulation
Transistor
Dye penetration test
42. Area load piston/area of effort piston
VR
Concrete
drop forging
n%
43. Mass X gravity X height
thermosoftening polymer
Potential energy
Uniform attack
Ultrasonic inspection
44. Load/effort
Commutator
shear stress
MA
spalling concrete
45. Allows for another signal to be sent along the carrier signal
Kinetic energy
modulation
AC motor
bending stress
46. A method of transmitting signals by changing the frequency of a wave
Frequency modulation
spalling concrete
Sacrifical anode
Satellite
47. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.
forging
Concrete
spalling concrete
tungsten alloy
48. 100khz
Geosynchronous orbit
Bandwidth
sin
AM
49. 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
DC motor
Sacrifical anode
Normalising
50. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
Attenuation
stress corrosion
Radiography
MA
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