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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. Soft - ductile
ferrite
bending stress
High frequency
Bandwidth
2. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies
sin
Attenuation
Brushes
thermoplastic rubbers
3. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains
Normalising
Impressed current
rectifier
Strain
4. Hard - strong
Impressed current
Satellite
pearlite
Normalising
5. Resulting from exposure to damp environments and liquids.
wet corrosion/electrochemical corrosion
open die forging
stress
hot rolling
6. Rubbers
elastomers=what
cold rolling
thermosoftening polymer
forging properties
7. Load/area
manganese and silicon alloy
AM
stress
Ultrasonic inspection
8. 100GHZ+
thermosoftening polymer
Dye penetration test
Magnetic inspection
Satellite
9. Between 2000-35 -700km above the earth's surface.
forging
medium carbon steel
Medium earth orbit
Ultrasonic inspection
10. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.
fibre optic cable
Dry corrosion
tungsten alloy
Commutator
11. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
Kinetic energy
hot rolling
Tempered Glass
Commutator
12. 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.
tungsten alloy
white cast iron
Twisted pair cable
Impressed current
13. A strong hard building material composed of sand and gravel and cement and water
n
Concrete
modulation
forging properties
14. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
n
Tempering
Geosynchronous orbit
elastomers=what
15. 1/4 of the wavelength (higher better)
MA
Radio antenna length
Satellite
Uniform attack
16. The quantity of information that can be transmitted through a communication medium in a given amount of time.
closed die forging
extrusion
MA
Bandwidth
17. MA=VR
mild steel
tungsten alloy
Medium earth orbit
if 100% efficient
18. These have weaker secondary bonds which allow the stretching
Annealing
thermoplastic rubbers
Dry corrosion
cementite
19. Ma/vr
extrusion
Laminated glass
n
Twisted pair cable
20. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
thermosetting polymers
modulation
if 100% efficient
sin
21. Field winding parallel to armature winding. Bad for direct coupling
cos
DC motor
fibre optic cable
ultra- high carbon steel
22. Hard - brittle
cementite
High frequency
Medium earth orbit
Bandwidth
23. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear
pearlite
Dry corrosion
high carbon steel
Ultrasonic inspection
24. Mass X gravity X height
n%
Mobiles
Potential energy
stress corrosion
25. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
Hardening
Kinetic energy
Sacrifical anode
fibre optic cable
26. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.
wet corrosion/electrochemical corrosion
rectifier
Ultrasonic inspection
malleable cast iron
27. An orbit less than 1 -500 km. above the Earth's surface.
thermosoftening polymer
Bandwidth
ultra- high carbon steel
Low earth orbit
28. A method of transmitting signals by changing the frequency of a wave
Frequency modulation
Radiography
drop forging
forging
29. Soaked cast iron at 870c for long time then cooled slow
malleable cast iron
n
forging properties
Tempered Glass
30. Maximum bending moments X distance to natural axis/ second moment of area
bending stress
VR
chromium alloy
Satellite
31. Horizontal
malleable cast iron
Frequency modulation
Impressed current
cos
32. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
wet corrosion/electrochemical corrosion
sin
shear stress
nodular graphite cast iron
33. 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
manganese and silicon alloy
wet corrosion/electrochemical corrosion
Uniform attack
34. 1%<X<2% carbon. more cementite - used for files
Amplitude modulation
manganese and silicon alloy
Potential energy
ultra- high carbon steel
35. Area load piston/area of effort piston
wet corrosion/electrochemical corrosion
VR
forging properties
thermosetting polymers
36. 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
Sacrifical anode
Normalising
Dry corrosion
Uniform attack
37. AC to DC
Low earth orbit
rectifier
ultra- high carbon steel
thermoset rubbers
38. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
stress
grey cast iron
Potential energy
if 100% efficient
39. 1GHZ
Mobiles
Frequency modulation
VR
cos
40. Better properties that would come from machining
Low earth orbit
Uniform attack
forging properties
Attenuation
41. x<0.15% carbon. ferrite. good for cold working - rolling sheets
DC motor
n%
stress
Low carbon steel
42. X<1% silicon no graphite - has carbon/carbide. very brittle
manganese and silicon alloy
fibre optic cable
white cast iron
if 100% efficient
43. 100khz
closed die forging
Twisted pair cable
nickel alloy
AM
44. Produces; harder - stronger and less ductile product
Normalising
Hardening
mild steel
cold rolling
45. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering
manganese and silicon alloy
AM
Laminated glass
Brushes
46. Area parallel to force
thermoplastic rubbers
wet corrosion/electrochemical corrosion
cos
shear stress
47. 1/2Xmass X velocity X velocity
spalling concrete
Frequency modulation
Kinetic energy
Ultrasonic inspection
48. Elongation of grain flow in direction of rolling
ultra- high carbon steel
Normalising
hot rolling
DC motor
49. Load/effort
Attenuation
forging
cos
MA
50. Solid at room temp - weak secondary bonds. can be reheated multiply times.
Uniform attack
grey cast iron
thermosoftening polymer
Bernoulli's principle high speed
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