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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. Resulting from exposure to oxygen in the atmosphere - chemical fumes - steam - flue gas. creates a layer of metal oxide.
open die forging
Dry corrosion
rectifier
if 100% efficient
2. When upper die is dropped on bottom
drop forging
Bernoulli's principle high speed
n%
thermosetting polymers
3. Controlled cooling after heating metal to attain a degree of hardness. removes internal stresses
Medium earth orbit
Dye penetration test
Tempering
High frequency
4. 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
Tempering
Transistor
forging properties
Magnetic inspection
5. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering
Amplitude modulation
Potential energy
Mobiles
Laminated glass
6. Small amounts of magnesium to make spheres instead of flakes. thus no stress concentrations
Laminated glass
ultra- high carbon steel
nodular graphite cast iron
cold rolling
7. Can be reflected of the ionosphere - 3 to 30 megahertz
ultra- high carbon steel
fibre optic cable
n%
High frequency
8. Soft - ductile
ferrite
Radio antenna length
fibre optic cable
nickel alloy
9. The greater the sulphur the harder the rubber to stretch
Radiography
thermoset rubbers
Potential energy
Amplitude modulation
10. A method of transmitting signals by changing the amplitude of a waves
rectifier
Low carbon steel
malleable cast iron
Amplitude modulation
11. 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
High frequency
MA
elastomers=what
AC motor
12. A cable made of optical fibers that can transmit large amounts of information at the speed of light
nodular graphite cast iron
cold rolling
fibre optic cable
Twisted pair cable
13. Good toughness and fatigue. high strength structures
stress
Normalising
nickel alloy
fibre optic cable
14. Maximum bending moments X distance to natural axis/ second moment of area
cold rolling
bending stress
Impressed current
MA
15. Mass X gravity X height
Potential energy
forging
Satellite
Low earth orbit
16. Soaked cast iron at 870c for long time then cooled slow
Geosynchronous orbit
Normalising
Bernoulli's principle low speed
malleable cast iron
17. Between 2000-35 -700km above the earth's surface.
Medium earth orbit
modulation
Frequency modulation
drop forging
18. 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
Impressed current
spalling concrete
Dye penetration test
Tempering
19. Based on the principle that magnetic materials will have distorted magnetic fields in the vicinity of material defects
Low carbon steel
Kinetic energy
Magnetic inspection
thermoplastic rubbers
20. Horizontal
Strain
Mobiles
Potential energy
cos
21. Field winding parallel to armature winding. Bad for direct coupling
sin
Ultrasonic inspection
DC motor
FM
22. Elongation of grain flow in direction of rolling
Frequency modulation
hot rolling
Sacrifical anode
Kinetic energy
23. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points
grey cast iron
Annealing
elastomers=what
pearlite
24. Squeezing of the hot metal between two shaped dies excess is cut off
Magnetic inspection
spalling concrete
DC motor
closed die forging
25. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces
Tempered Glass
extrusion
Laminated glass
Normalising
26. An orbit less than 1 -500 km. above the Earth's surface.
Low earth orbit
Bernoulli's principle low speed
hot rolling
MA
27. Vertical
sin
shear stress
thermosetting polymers
grey cast iron
28. A strong hard building material composed of sand and gravel and cement and water
Mobiles
High frequency
Concrete
n
29. Forming of metal by compressive force above recrystallization point.
forging
FM
thermoplastic rubbers
Ultrasonic inspection
30. 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.
VR
hot rolling
tungsten alloy
Impressed current
31. Usually used together - strengthening and toughness
manganese and silicon alloy
medium carbon steel
thermoset rubbers
Dye penetration test
32. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool
extrusion
open die forging
Brushes
nodular graphite cast iron
33. Involves heating the piece above Red heat and then letting it cool in air. causes smaller grains
cos
Normalising
Transistor
FM
34. Resulting from combined effect of stresses set up within the metal
mild steel
wet corrosion/electrochemical corrosion
MA
stress corrosion
35. Produces; harder - stronger and less ductile product
cold rolling
Mobiles
shear stress
Annealing
36. Being forced - under pressure - through a hole like toothpaste. either hot or cold
cold rolling
Uniform attack
extrusion
modulation
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
Annealing
Mobiles
Concrete
ferrite
38. These have weaker secondary bonds which allow the stretching
thermoplastic rubbers
Transistor
Tempered Glass
Radiography
39. 1/4 of the wavelength (higher better)
Amplitude modulation
Strain
Radiography
Radio antenna length
40. Low pressure
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41. AC to DC
nodular graphite cast iron
cold rolling
ultra- high carbon steel
rectifier
42. 1%<X<2% carbon. more cementite - used for files
drop forging
forging
ultra- high carbon steel
Satellite
43. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles
medium carbon steel
Potential energy
ferrite
nickel alloy
44. Results from the changing anode and cathode regions over the entire surface
Brushes
thermoset rubbers
Uniform attack
Frequency modulation
45. Difference/original
Strain
pearlite
Ultrasonic inspection
Twisted pair cable
46. Ma/vr x 100/1
thermoset rubbers
n%
wet corrosion/electrochemical corrosion
high carbon steel
47. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies
shear stress
Bernoulli's principle low speed
Bernoulli's principle high speed
Attenuation
48. High pressure
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49. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures
Twisted pair cable
mild steel
n%
cos
50. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds
Attenuation
hot rolling
thermoset rubbers
thermosetting polymers