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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. Vertical
sin
Concrete
Medium earth orbit
malleable cast iron
2. Can be reflected of the ionosphere - 3 to 30 megahertz
pearlite
Low carbon steel
thermoset rubbers
High frequency
3. 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
shear stress
AC motor
elastomers=what
bending stress
4. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
nodular graphite cast iron
malleable cast iron
Attenuation
extrusion
5. Mass X gravity X height
Potential energy
Dye penetration test
forging
VR
6. Low pressure
7. Good high temp wear - tools
tungsten alloy
Satellite
pearlite
Brushes
8. 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 properties
Impressed current
hot rolling
modulation
9. 1GHZ
n
thermosoftening polymer
medium carbon steel
Mobiles
10. 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
High frequency
ultra- high carbon steel
thermosetting polymers
Sacrifical anode
11. The greater the sulphur the harder the rubber to stretch
thermoset rubbers
Ultrasonic inspection
ferrite
n
12. Field winding parallel to armature winding. Bad for direct coupling
Bandwidth
Bernoulli's principle low speed
DC motor
Tempering
13. MA=VR
if 100% efficient
high carbon steel
MA
grey cast iron
14. 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
n%
Annealing
cos
Low earth orbit
15. Elongation of grain flow in direction of rolling
hot rolling
Kinetic energy
modulation
elastomers=what
16. Resulting from exposure to damp environments and liquids.
Ultrasonic inspection
wet corrosion/electrochemical corrosion
medium carbon steel
Normalising
17. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
Tempered Glass
if 100% efficient
Kinetic energy
shear stress
18. 100khz
FM
DC motor
AM
open die forging
19. Ma/vr
n
cos
forging properties
closed die forging
20. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains
Hardening
n
Normalising
Bernoulli's principle low speed
21. Between 2000-35 -700km above the earth's surface.
if 100% efficient
fibre optic cable
Fluorescent test
Medium earth orbit
22. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
Frequency modulation
grey cast iron
MA
Radiography
23. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear
stress corrosion
cos
DC motor
high carbon steel
24. Solid at room temp - weak secondary bonds. can be reheated multiply times.
stress
Brushes
thermosoftening polymer
Mobiles
25. When upper die is dropped on bottom
Dye penetration test
drop forging
Twisted pair cable
AM
26. A cable made of optical fibers that can transmit large amounts of information at the speed of light
Kinetic energy
thermosoftening polymer
fibre optic cable
rectifier
27. Horizontal
Bernoulli's principle high speed
cos
wet corrosion/electrochemical corrosion
Brushes
28. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles
Normalising
medium carbon steel
High frequency
AM
29. x<0.15% carbon. ferrite. good for cold working - rolling sheets
open die forging
AC motor
wet corrosion/electrochemical corrosion
Low carbon steel
30. 10MHZ
Bernoulli's principle high speed
FM
Satellite
stress
31. Soft - ductile
ferrite
tungsten alloy
Potential energy
thermoset rubbers
32. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
thermosetting polymers
grey cast iron
closed die forging
elastomers=what
33. 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
Bernoulli's principle low speed
Potential energy
Transistor
high carbon steel
34. A method of transmitting signals by changing the frequency of a wave
Fluorescent test
grey cast iron
Frequency modulation
AC motor
35. 1/4 of the wavelength (higher better)
Radio antenna length
cos
chromium alloy
stress corrosion
36. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.
stress
Ultrasonic inspection
Bernoulli's principle low speed
ultra- high carbon steel
37. Better properties that would come from machining
thermoplastic rubbers
extrusion
forging properties
ferrite
38. 1%<X<2% carbon. more cementite - used for files
cold rolling
Satellite
Fluorescent test
ultra- high carbon steel
39. 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
Low carbon steel
DC motor
nodular graphite cast iron
40. Resulting from combined effect of stresses set up within the metal
mild steel
Tempering
thermoset rubbers
stress corrosion
41. Good wear - case hardening. ball bearings
Bernoulli's principle low speed
Potential energy
grey cast iron
chromium alloy
42. 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
Commutator
thermoplastic rubbers
Bernoulli's principle high speed
Tempering
43. 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
elastomers=what
mild steel
fibre optic cable
44. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures
Low carbon steel
mild steel
manganese and silicon alloy
stress corrosion
45. Supply current to the rotating commutator from an external source
DC motor
sin
Concrete
Brushes
46. Load/area
stress
nodular graphite cast iron
Bernoulli's principle low speed
ferrite
47. High pressure
48. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
thermoplastic rubbers
white cast iron
thermosetting polymers
spalling concrete
49. A strong hard building material composed of sand and gravel and cement and water
Concrete
wet corrosion/electrochemical corrosion
malleable cast iron
thermosetting polymers
50. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
if 100% efficient
Radio antenna length
Tempering
Kinetic energy