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Engineering Studies
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. x<0.15% carbon. ferrite. good for cold working - rolling sheets
Magnetic inspection
Low carbon steel
n
Geosynchronous orbit
2. Better properties that would come from machining
Mobiles
forging properties
Fluorescent test
Medium earth orbit
3. A method of transmitting signals by changing the frequency of a wave
Frequency modulation
n%
Commutator
n
4. 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.
Impressed current
medium carbon steel
thermoset rubbers
Commutator
5. Resulting from combined effect of stresses set up within the metal
manganese and silicon alloy
Sacrifical anode
stress corrosion
Twisted pair cable
6. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool
nodular graphite cast iron
open die forging
modulation
Sacrifical anode
7. Good high temp wear - tools
tungsten alloy
Mobiles
ultra- high carbon steel
high carbon steel
8. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
manganese and silicon alloy
Tempering
hot rolling
rectifier
9. Difference/original
high carbon steel
Radiography
Strain
forging properties
10. Mass X gravity X height
nodular graphite cast iron
Potential energy
Radio antenna length
FM
11. Ma/vr
thermoset rubbers
malleable cast iron
n
Hardening
12. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
extrusion
pearlite
Radiography
Bernoulli's principle high speed
13. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.
Medium earth orbit
Dry corrosion
modulation
manganese and silicon alloy
14. Field winding parallel to armature winding. Bad for direct coupling
Low earth orbit
stress corrosion
Bernoulli's principle low speed
DC motor
15. Good toughness and fatigue. high strength structures
Low earth orbit
High frequency
Attenuation
nickel alloy
16. Load/effort
ultra- high carbon steel
nodular graphite cast iron
MA
Sacrifical anode
17. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
Hardening
Fluorescent test
open die forging
modulation
18. Between 2000-35 -700km above the earth's surface.
Medium earth orbit
malleable cast iron
rectifier
sin
19. Good wear - case hardening. ball bearings
Ultrasonic inspection
Potential energy
chromium alloy
FM
20. 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
Geosynchronous orbit
Transistor
Bandwidth
21. Hard - brittle
cementite
spalling concrete
Sacrifical anode
thermoset rubbers
22. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
Sacrifical anode
Tempered Glass
Low earth orbit
thermosetting polymers
23. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
nodular graphite cast iron
DC motor
forging properties
Kinetic energy
24. A method of transmitting signals by changing the amplitude of a waves
Hardening
Bandwidth
Low carbon steel
Amplitude modulation
25. These have weaker secondary bonds which allow the stretching
n
malleable cast iron
fibre optic cable
thermoplastic rubbers
26. High pressure
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27. Rubbers
Radiography
ferrite
elastomers=what
thermosoftening polymer
28. X<1% silicon no graphite - has carbon/carbide. very brittle
white cast iron
fibre optic cable
Magnetic inspection
AC motor
29. Low pressure
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30. Dye is sprayed onto a surface - with excess being wiped away - meaning any left on the piece would be in cracks that exist in it. A Fluorescent light is turned on to expose any left over - I.e in the cracks
hot rolling
nickel alloy
Fluorescent test
Mobiles
31. 1/2Xmass X velocity X velocity
stress
Concrete
DC motor
Kinetic energy
32. Ma/vr x 100/1
modulation
n%
Bandwidth
Tempered Glass
33. Hard - strong
closed die forging
nickel alloy
cold rolling
pearlite
34. 1/4 of the wavelength (higher better)
extrusion
Dye penetration test
white cast iron
Radio antenna length
35. A device that converts the AC inside a DC generator to a DC output or converts a DC supply to an AC inside a DC motor.keeping the armature rotating
Dye penetration test
Commutator
drop forging
Low earth orbit
36. Area load piston/area of effort piston
VR
thermosoftening polymer
rectifier
n%
37. 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
grey cast iron
AC motor
Tempering
Annealing
38. Solid at room temp - weak secondary bonds. can be reheated multiply times.
Impressed current
Fluorescent test
thermosoftening polymer
mild steel
39. Results from the changing anode and cathode regions over the entire surface
closed die forging
Uniform attack
thermoplastic rubbers
shear stress
40. 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
Geosynchronous orbit
Bernoulli's principle high speed
Frequency modulation
AC motor
41. 1GHZ
sin
Mobiles
MA
FM
42. Allows for another signal to be sent along the carrier signal
modulation
High frequency
bending stress
Frequency modulation
43. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear
high carbon steel
MA
stress corrosion
thermosetting polymers
44. 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
forging properties
wet corrosion/electrochemical corrosion
Concrete
AC motor
45. The greater the sulphur the harder the rubber to stretch
white cast iron
FM
Uniform attack
thermoset rubbers
46. 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
spalling concrete
Concrete
Low carbon steel
Sacrifical anode
47. Produces; harder - stronger and less ductile product
medium carbon steel
drop forging
Frequency modulation
cold rolling
48. MA=VR
Impressed current
Strain
if 100% efficient
MA
49. Based on the principle that magnetic materials will have distorted magnetic fields in the vicinity of material defects
Magnetic inspection
nodular graphite cast iron
cementite
bending stress
50. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.
spalling concrete
Radio antenna length
pearlite
bending stress
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