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Power 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. Mechanical efficiency
Sulfuric acid
Process flow drawing
Divide the maximum load by the original cross - sectional area
Output power(W)/input power(W)

2. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Relative density
Isosceles triangle
velocity
Pm x A x L

3. Change in tempereature where no heat in transferred - PV(supercript v) = C
The elastic limit of the material is not exceeded
Adiabatic
hardness
Ammonia

4. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Complementary angles
M x g x h (kg x 9.81 m/s/s x height (m))
The elastic limit of the material is not exceeded
10.8 m N of W

5. The most common scale in use is the...
latent heat of evaporation (vaporation)
Octagon
45 kN
Celsius

6. A quadrilateral with two parallel sides
Celsius
Unified National
Trapezoid
A twisting or turning effect

7. Of a process or change taking place at constant temperature - PV = C
Mensuration
To calculate power from an engine
Ideal mechanical advantage
Isothermal

8. Work per power stroke (J)
White metal and bronze
benefits of nickel
Pm x A x L
Greater than 180 degrees

9. The precise measurement of heat flow out of a system for chemical and physical processes
45 kN
0.0002
Calorimetry
displacement

10. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain

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11. Acute angle
Heating and cooling white cast iron at a controlled rate
Less than 90 degrees
benefits of chromium - nickel and copper in alloy steels
Conditions required to produce sulphide corrosion cracking

12. The factor of safety is always expressed...
As a ratio
Toughness
45 kN
Permanent and removable

13. The moment of a force about a point is...
Trapezium
A twisting or turning effect
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
A / SinA = b / SinB = c / SinC

14. The ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface u = tan(thada) - coefficient of friction is equal to the tangent of friction angle
Coefficient of friction
1/2mv2 (kg x velocity(m/s))
Ammonia
Composite material

15. 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
Coefficient of friction
Naperian (Natural) logarithms
0.0723
hexagon

16. 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
Stress corrosion cracking
Trapezium
10.8 m N of W
displacement

17. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
45 kN
water equivalent
Problem solving order
Stray current corrosion

18. The classes of fastening devices are...
The elastic limit of the material is not exceeded
polygon
Dividing the ultimate strength by the factor of safety
Permanent and removable

19. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
The equilibrant
Stray current corrosion
hexagon
A / SinA = b / SinB = c / SinC

20. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
benefits of copper
distance
That is supported at two ends

21. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Increase
520.72 kJ/kg
Material balance
A number with the necessary unit

22. Force
Mass x acceleration (N)
Coefficient of friction
One angle is exactly 90 degrees
Relative density

23. Cosine rule
110.6 kPa
A
1/2mv2 (kg x velocity(m/s))
elasticity

24. A triangle with two equal sides
45 kN
benefits of copper
Be the same at any point in the process
Isosceles triangle

25. As the cosine decreases - the...
Pm x A x L x N
Value of the angle increases
The specific heat of the material
Total heat required for change of state

26. A pinch of salt is added to a glass of water. The result is...
Sulfuric acid
Stress corrosion cracking
57.48 mm
A solution

27. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Purpose of P & IDs
As a ratio
Boyle's law
520.72 kJ/kg

28. H2SO4 is the chemical formula for...
Pm x A x L x N
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Boyle's law
Sulfuric acid

29. A displacement of 9 m north of point A - and another of 6 m west of point A can be added to give a resultant displacement from point A of...
White
Calorimetry
dryness fraction
10.8 m N of W

30. A closed plane figure bounded by straight sides
View of a cutting plane
polygon
Ultimate stress/working stress
A

31. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
0.89
Relative density
Calorimetry
Cathodic protection system

32. A quadrilateral with no parallel sides
Trapezium
Stray current corrosion
A solution
Work

33. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
179.02
basic oxygen process
Pm x A x L
polygon

34. Potential energy (Ep)
A = 4/3h2 [(square root)d/h-0.608]
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
M x g x h (kg x 9.81 m/s/s x height (m))
That is supported at two ends

35. Ability to withstand deformation above elastic limit under compression without failure
Malleability
Stroke
Stress corrosion cracking
Rhomboid

36. Ratio of the opposite to the adjacent side of a right- angled triangle
Resultant
A. sine of 90
Tangent
hexagon

37. When calculating the ultimate stress of a material - we should
110.6 kPa
Divide the maximum load by the original cross - sectional area
Composite material
26.81 m/s

38. Micro organisms promote corrosion...
Power
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Celsius
M x g x h (kg x 9.81 m/s/s x height (m))

39. 1. In a right angle triangle - the sine of an acute angle is equal to...
One
hardness
M x g x h (kg x 9.81 m/s/s x height (m))
Opposite side / hypotenuse

40. A straight line that joins 2 points or circumference
Chord
M x g x h (kg x 9.81 m/s/s x height (m))
distance
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only

41. Negative terminal of the rectifier must always be connected to the structure that is being protected
Isothermal
Cathodic protection system
Rhombus
Mechanical flow diagrams

42. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -
Divide the maximum load by the original cross - sectional area
That is supported at two ends
benefits of nickel
A number with the necessary unit

43. coefficient of volumetric expansion

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44. A parallelogram with four equal sides
As a ratio
Relative density
Rhombus
Heating and cooling white cast iron at a controlled rate

45. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
latent heat of evaporation (vaporation)
A Greek letter alpha linear
Heat engines
Chord

46. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
Areas of sectors (bounded by 2 radii and arc between them)
benefits of chromium - nickel and copper in alloy steels
Toughness
Calorimetry

47. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
A
110.6 kPa
A

48. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Continuity flow
70 MPa
Tangent
Work

49. Sine Rule
The equilibrant
A / SinA = b / SinB = c / SinC
distance
Unified National

50. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Complementary angles
White metal and bronze
ellipse
Areas of sectors (bounded by 2 radii and arc between them)