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Test your basic knowledge |
Engineering Studies
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Study First
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. Rubbers
Dry corrosion
Bernoulli's principle high speed
elastomers=what
Brushes
2. X<1% silicon no graphite - has carbon/carbide. very brittle
Mobiles
white cast iron
Normalising
Impressed current
3. Solid at room temp - weak secondary bonds. can be reheated multiply times.
High frequency
AC motor
thermosoftening polymer
cos
4. 10MHZ
nickel alloy
wet corrosion/electrochemical corrosion
Amplitude modulation
FM
5. Can be reflected of the ionosphere - 3 to 30 megahertz
Brushes
High frequency
FM
ultra- high carbon steel
6. Good toughness and fatigue. high strength structures
modulation
nickel alloy
Bernoulli's principle high speed
pearlite
7. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film
VR
Brushes
nodular graphite cast iron
Radiography
8. Forming of metal by compressive force above recrystallization point.
Mobiles
drop forging
modulation
forging
9. High pressure
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10. Area load piston/area of effort piston
if 100% efficient
fibre optic cable
n
VR
11. 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 developer is then added to it to expose any left over - I.e in the cracks
n%
Dye penetration test
AC motor
Bandwidth
12. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
Laminated glass
Satellite
nickel alloy
Tempering
13. Load/area
stress
VR
tungsten alloy
FM
14. Load/effort
forging
sin
Tempered Glass
MA
15. Good wear - case hardening. ball bearings
chromium alloy
Geosynchronous orbit
Potential energy
mild steel
16. Based on the principle that magnetic materials will have distorted magnetic fields in the vicinity of material defects
Strain
Magnetic inspection
Low carbon steel
forging properties
17. Difference/original
Satellite
Strain
Dry corrosion
pearlite
18. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
High frequency
thermosetting polymers
forging properties
manganese and silicon alloy
19. x<0.15% carbon. ferrite. good for cold working - rolling sheets
Low carbon steel
Uniform attack
nodular graphite cast iron
Radio antenna length
20. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching
Annealing
elastomers=what
thermoset rubbers
Hardening
21. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
white cast iron
Tempered Glass
Concrete
mild steel
22. 0.6%<X<1% carbon. almost entirely pearlite with cementite x>0.8% for high strength and wear
high carbon steel
Brushes
Dry corrosion
FM
23. 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
AC motor
n%
cos
thermosoftening polymer
24. 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
sin
Laminated glass
Transistor
25. Maximum bending moments X distance to natural axis/ second moment of area
stress corrosion
Attenuation
Radio antenna length
bending stress
26. 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.
modulation
FM
thermosoftening polymer
Impressed current
27. 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.
mild steel
Brushes
Twisted pair cable
DC motor
28. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies
modulation
Attenuation
if 100% efficient
Tempered Glass
29. 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
Potential energy
Commutator
hot rolling
open die forging
30. Area parallel to force
Laminated glass
thermosetting polymers
Sacrifical anode
shear stress
31. 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
extrusion
thermoset rubbers
Fluorescent test
nickel alloy
32. A strong hard building material composed of sand and gravel and cement and water
Laminated glass
manganese and silicon alloy
Concrete
AM
33. The greater the sulphur the harder the rubber to stretch
thermoset rubbers
bending stress
grey cast iron
Strain
34. 1/2Xmass X velocity X velocity
Kinetic energy
Fluorescent test
forging
nickel alloy
35. 1GHZ
Commutator
Annealing
stress corrosion
Mobiles
36. Ma/vr x 100/1
n%
thermoset rubbers
rectifier
Tempered Glass
37. Results from the changing anode and cathode regions over the entire surface
Laminated glass
AM
Uniform attack
thermosoftening polymer
38. Hard - brittle
cementite
Tempering
nickel alloy
Tempered Glass
39. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering
Laminated glass
VR
Medium earth orbit
forging properties
40. Being forced - under pressure - through a hole like toothpaste. either hot or cold
extrusion
malleable cast iron
forging
Geosynchronous orbit
41. A method of transmitting signals by changing the frequency of a wave
chromium alloy
ferrite
Frequency modulation
MA
42. When upper die is dropped on bottom
Bandwidth
Strain
drop forging
Laminated glass
43. 1/4 of the wavelength (higher better)
Radio antenna length
drop forging
DC motor
cos
44. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool
thermoplastic rubbers
Fluorescent test
open die forging
AC motor
45. The quantity of information that can be transmitted through a communication medium in a given amount of time.
Radiography
shear stress
Geosynchronous orbit
Bandwidth
46. Elongation of grain flow in direction of rolling
hot rolling
Amplitude modulation
spalling concrete
if 100% efficient
47. Resulting from exposure to damp environments and liquids.
ferrite
Kinetic energy
wet corrosion/electrochemical corrosion
cementite
48. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
grey cast iron
Commutator
white cast iron
Dye penetration test
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
pearlite
Annealing
Commutator
Sacrifical anode
50. An orbit less than 1 -500 km. above the Earth's surface.
Ultrasonic inspection
thermosetting polymers
Low earth orbit
n
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