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Test your basic knowledge |
Engineering Studies
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 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. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
nodular graphite cast iron
Attenuation
Annealing
Kinetic energy
2. 1/4 of the wavelength (higher better)
if 100% efficient
cold rolling
Radio antenna length
Annealing
3. Better properties that would come from machining
forging properties
nickel alloy
extrusion
Mobiles
4. Ma/vr
Radiography
n
fibre optic cable
Bernoulli's principle low speed
5. Soaked cast iron at 870c for long time then cooled slow
MA
malleable cast iron
medium carbon steel
nickel alloy
6. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.
Ultrasonic inspection
high carbon steel
Tempered Glass
thermoset rubbers
7. 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
Laminated glass
Commutator
Dry corrosion
Impressed current
8. Maximum bending moments X distance to natural axis/ second moment of area
Laminated glass
rectifier
bending stress
nodular graphite cast iron
9. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.
Frequency modulation
Twisted pair cable
thermosoftening polymer
spalling concrete
10. 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.
forging
closed die forging
spalling concrete
Impressed current
11. Horizontal
Low carbon steel
cos
Twisted pair cable
shear stress
12. A strong hard building material composed of sand and gravel and cement and water
Normalising
Low carbon steel
Concrete
Transistor
13. A cable made of optical fibers that can transmit large amounts of information at the speed of light
medium carbon steel
Twisted pair cable
sin
fibre optic cable
14. Solid at room temp - weak secondary bonds. can be reheated multiply times.
thermosoftening polymer
ultra- high carbon steel
Satellite
forging properties
15. 1%<X<2% carbon. more cementite - used for files
Low carbon steel
Strain
ultra- high carbon steel
grey cast iron
16. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
thermosetting polymers
Transistor
Strain
Magnetic inspection
17. Soft - ductile
cementite
bending stress
ferrite
closed die forging
18. 10MHZ
FM
AM
Transistor
medium carbon steel
19. 1GHZ
Mobiles
Strain
hot rolling
Twisted pair cable
20. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
Tempering
malleable cast iron
thermoplastic rubbers
thermosoftening polymer
21. 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
n%
thermoplastic rubbers
Sacrifical anode
medium carbon steel
22. Field winding parallel to armature winding. Bad for direct coupling
Radiography
DC motor
ultra- high carbon steel
Ultrasonic inspection
23. 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
Fluorescent test
Low carbon steel
grey cast iron
hot rolling
24. Good toughness and fatigue. high strength structures
nickel alloy
manganese and silicon alloy
shear stress
extrusion
25. 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.
Strain
Concrete
DC motor
Twisted pair cable
26. Resulting from exposure to damp environments and liquids.
Radiography
stress corrosion
wet corrosion/electrochemical corrosion
Mobiles
27. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains
Satellite
pearlite
white cast iron
Normalising
28. Difference/original
Strain
Medium earth orbit
MA
Twisted pair cable
29. Good wear - case hardening. ball bearings
shear stress
Satellite
chromium alloy
Radiography
30. 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
Radiography
Satellite
Sacrifical anode
31. Load/area
stress
shear stress
manganese and silicon alloy
chromium alloy
32. Low pressure
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33. Between 2000-35 -700km above the earth's surface.
stress corrosion
Frequency modulation
Dye penetration test
Medium earth orbit
34. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool
Uniform attack
Bandwidth
hot rolling
open die forging
35. 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
tungsten alloy
Transistor
Dry corrosion
Radiography
36. 100GHZ+
Satellite
Brushes
stress
Concrete
37. Good high temp wear - tools
tungsten alloy
pearlite
sin
Uniform attack
38. Rubbers
elastomers=what
stress corrosion
rectifier
wet corrosion/electrochemical corrosion
39. MA=VR
cos
Strain
if 100% efficient
thermoplastic rubbers
40. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
High frequency
ferrite
cos
grey cast iron
41. 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
Commutator
Dye penetration test
Annealing
Low earth orbit
42. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
Hardening
if 100% efficient
shear stress
thermoset rubbers
43. Hard - strong
pearlite
chromium alloy
bending stress
VR
44. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles
medium carbon steel
pearlite
forging properties
cos
45. Produces; harder - stronger and less ductile product
cold rolling
Strain
open die forging
Fluorescent test
46. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures
hot rolling
ferrite
mild steel
Normalising
47. A method of transmitting signals by changing the frequency of a wave
DC motor
Frequency modulation
ferrite
cold rolling
48. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
Radiography
hot rolling
mild steel
Sacrifical anode
49. Ma/vr x 100/1
Annealing
n%
Twisted pair cable
Kinetic energy
50. An orbit less than 1 -500 km. above the Earth's surface.
wet corrosion/electrochemical corrosion
Low earth orbit
AC motor
MA