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Test your basic knowledge |
Power Engineering
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. The most common thread used in North America on fasteners such as bolts - is the...
Pm x A x L x N
That is supported at two ends
Unified National
The equilibrant
2. Energy can be...
Transformed to different forms
Stroke
Scalene triangle
Work
3. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Work
Exactly 180 degrees
dryness fraction
10.8 m N of W
4. H2SO4 is the chemical formula for...
Sulfuric acid
Greater than 180 degrees
70 MPa
The equilibrant
5. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Sensible heat
Toughness
Chord
6. When calculating the ultimate stress of a material - we should
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Divide the maximum load by the original cross - sectional area
Malleability
View of a cutting plane
7. The precise measurement of heat flow out of a system for chemical and physical processes
4.4 m/s
One
Calorimetry
Heat engines
8. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
hexagon
Pm x A x L
White metal and bronze
Falling temperature
9. When heat is supplied to a liquid in sufficient quantity to change the liquid to a vapour without changing the temperature - the heat supplied is known as...
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
45 kN
Latent heat of evaporation
General gas law
10. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems
A Greek letter alpha linear
elasticity
Output power(W)/input power(W)
Purpose of P & IDs
11. The act or process of measuring
Mensuration
Sulfuric acid
Mass x acceleration (N)
Problem solving order
12. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Celsius
Areas of sectors (bounded by 2 radii and arc between them)
Sensible heat
Conditions required to produce sulphide corrosion cracking
13. Any two angles whose sum is 90
Cathodic protection system
Less than 90 degrees
Sensible heat
Complementary angles
14. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
hardness
velocity
Calorimetry
The specific heat of the material
15. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Malleability
Permanent and removable
benefits of copper
velocity
16. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.
brinell hardness test
Heat engines
Unified National
1 cm
17. Obtuse angle
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Power
More than 90 degrees
Heat engines
18. PFDs
Stray current corrosion
Adiabatic
Process flow drawing
A
19. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
distance
More than 90 degrees
Stray current corrosion
Transformed to different forms
20. A quadrilateral with no parallel sides
Trapezium
Toughness
520.72 kJ/kg
Work
21. coefficient of volumetric expansion
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22. Dangerous because a crack starts slowly and propagate slowly - exceed breaking strength and the metal fails suddenly - stress must be tensile can be produced by an external load or residual stress - condensed moisture and change in temperature
Stress corrosion cracking
elasticity
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Exactly 180 degrees
23. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
linear motion relationships
Purpose of material balance
benefits of chromium
45 kN
24. In the equation 0.004 + D = 0.0042 - the value of D is...
Increase
Coefficient of friction
0.0002
Adiabatic
25. Factor of safety
A twisting or turning effect
Ultimate stress/working stress
dryness fraction
Problem solving order
26. A parallelogram with four equal sides
Unified National
brinell hardness test
Rhombus
0.0723
27. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Falling temperature
Less than 90 degrees
hardness
water equivalent
28. Straight angle
Exactly 180 degrees
Mechanical flow diagrams
2.3026
Continuity flow
29. Work per second
Boyle's law
Pm x A x L x N
velocity
Transformed to different forms
30. The factor of safety is always expressed...
As a ratio
Less than 90 degrees
displacement
A number with the necessary unit
31. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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32. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20
Power
0.0723
161
The specific heat of the material
33. All sides equal - all angles are equal and opposite sides parallel - divided into 6 ISOSCELES triangles - each angle in an octagon is 135 - A = 4.83s2
Continuity flow
70 MPa
Exactly 180 degrees
Octagon
34. The force that is equal in magnitude but opposite in direction to the resultant force is called
The equilibrant
A number with the necessary unit
effective pressure
Heating and cooling white cast iron at a controlled rate
35. The rate at which heat flow through a slab of a material does not depend on...
The equilibrant
Stray current corrosion
Relative density
The specific heat of the material
36. Micro organisms promote corrosion...
Charles Law
Power
Output power(W)/input power(W)
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
37. Potential energy (Ep)
benefits of chromium
Sensible heat
M x g x h (kg x 9.81 m/s/s x height (m))
Cathodic protection system
38. Velocity ratio is...
45 kN
Ideal mechanical advantage
Charles Law
hexagon
39. Refers to change in the position of the body - relative to some reference point - not concerned with actual distance traveled - a vector quantity with magnitude and direction
Continuity flow
displacement
Relative density
Value of the angle increases
40. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Stroke
Trapezium
The specific heat of the material
Gamma - coefficient of superficial = 2x coefficient of linear expansion
41. A quadrilateral with two parallel sides
White metal and bronze
Trapezoid
Isosceles triangle
Mass x acceleration (N)
42. PV=nRT - Boyle's law and Charle's law combined
Mechanical flow diagrams
A / SinA = b / SinB = c / SinC
General gas law
Specific heat
43. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Divide the maximum load by the original cross - sectional area
Stress corrosion cracking
Mass x acceleration (N)
Stray current corrosion
44. Change in tempereature where no heat in transferred - PV(supercript v) = C
Chlorides
latent heat of evaporation (vaporation)
Conditions required to produce sulphide corrosion cracking
Adiabatic
45. One is the trigonometric value of...
A number with the necessary unit
brinell hardness test
hexagon
A. sine of 90
46. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Total heat required for change of state
Opposite side / hypotenuse
Sulfuric acid
Details of P & IDs
47. Sine Rule
benefits of copper
Opposite side / hypotenuse
Less than 90 degrees
A / SinA = b / SinB = c / SinC
48. Steam turbine bearings are usually made of...
White metal and bronze
Celsius
Toughness
latent heat of evaporation (vaporation)
49. Ability to withstand deformation above elastic limit under compression without failure
Work
water equivalent
Process flow drawing
Malleability
50. A 10 m long steel pipe when heated to increase its temperature by 85
latent heat of evaporation (vaporation)
10.8 m N of W
1 cm
57.48 mm