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Power Engineering

Instructions:

Answer 50 questions in 15 minutes.
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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. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Less than 90 degrees
Problem solving order
linear motion relationships
Power

2. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
A. sine of 90
basic oxygen process
Specific heat
elasticity

3. The ability to return to its original shape after an external force has been removed
Cathodic protection system
elasticity
Sensible heat
Toughness

4. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
8908 kJ
Rhomboid
Continuity flow
The elastic limit of the material is not exceeded

5. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.

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6. Straight angle
Stress corrosion cracking
110.6 kPa
Exactly 180 degrees
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only

7. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
White metal and bronze
Specific heat
General gas law
Hooke's Law

8. Energy can be...
White
Purpose of material balance
displacement
Transformed to different forms

9. Sine Rule
More than 90 degrees
White
Latent heat of evaporation
A / SinA = b / SinB = c / SinC

10. Ratio of the opposite to the adjacent side of a right- angled triangle
45 kN
dryness fraction
Tangent
Rhomboid

11. The precise measurement of heat flow out of a system for chemical and physical processes
520.72 kJ/kg
Dividing the ultimate strength by the factor of safety
Calorimetry
The elastic limit of the material is not exceeded

12. The most common thread used in North America on fasteners such as bolts - is the...
Mass
A. sine of 90
distance
Unified National

13. Cosine rule
A
Adiabatic
One angle is exactly 90 degrees
Mass

14. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
520.72 kJ/kg
Tangent
Adiabatic
Isothermal

15. Mechanical efficiency
brinell hardness test
Material balance
Output power(W)/input power(W)
One

16. Expansion of a gas is said to be adiabatic when expansion takes place at...
Celsius
Falling temperature
1/2mv2 (kg x velocity(m/s))
110.6 kPa

17. When calculating the ultimate stress of a material - we should
Power
Total heat required for change of state
0.89
Divide the maximum load by the original cross - sectional area

18. Pythagoras' Theorem
A
8908 kJ
Hooke's Law
45 kN

19. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Tangent
Details of P & IDs
Purpose of P & IDs
Permanent and removable

20. Being made of 2 or more substances creating unique characteristics and properties when combine
linear motion relationships
Sulfuric acid
Composite material
A

21. Factor of safety
Resultant
Mass
Mensuration
Ultimate stress/working stress

22. A pinch of salt is added to a glass of water. The result is...
A
2.3026
A solution
benefits of chromium

23. The act or process of measuring
A solution
latent heat of evaporation (vaporation)
Mensuration
A number with the necessary unit

24. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Heat engines
Scalene triangle
Conditions required to produce sulphide corrosion cracking
A twisting or turning effect

25. PFDs
A twisting or turning effect
Process flow drawing
Conditions required to produce sulphide corrosion cracking
A

26. In a pipe if no fluid is added or removed - flow must remain constant - due to the product of area and velocity being constant - flow must be the same going in as coming out of pipe
effective pressure
Continuity flow
Mensuration
A

27. Change in tempereature where no heat in transferred - PV(supercript v) = C
hexagon
Adiabatic
Heating and cooling white cast iron at a controlled rate
Work

28. coefficient of expansion
A Greek letter alpha linear
10.8 m N of W
The equilibrant
Greater than 180 degrees

29. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Stroke
Problem solving order
Latent heat of evaporation

30. Steam turbine bearings are usually made of...
Power
Process flow drawing
Tangent
White metal and bronze

31. P & IDs
velocity
1 cm
Mechanical flow diagrams
dryness fraction

32. Whether a material will break under sudden impact or hard blow
basic oxygen process
26.81 m/s
Toughness
Dividing the ultimate strength by the factor of safety

33. Resistance to wear - abrasion and penetration
Stray current corrosion
hardness
One
Purpose of P & IDs

34. Any two angles whose sum is 90
A. sine of 90
The specific heat of the material
Complementary angles
M x g x h (kg x 9.81 m/s/s x height (m))

35. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
1/2mv2 (kg x velocity(m/s))
Naperian (Natural) logarithms
Purpose of P & IDs
Charles Law

36. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
70 MPa
To calculate power from an engine
Purpose of P & IDs
Scalene triangle

37. The term _____ is used as a measure of the quantity of matter.
Mass
Continuity flow
Specific heat
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only

38. coefficient of volumetric expansion

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39. In the equation 0.004 + D = 0.0042 - the value of D is...
10.8 m N of W
0.0002
Specific heat
Coefficient of friction

40. Resists oxidation - high strength at high temperatures - increases hardness and abrasion resistance without increasing brittleness - increases response to heat treatment - increases depth of hardness penetration - at 12% chromium steel with not tarni
26.81 m/s
benefits of chromium
Specific heat
Pm x A x L x N

41. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
A = 4/3h2 [(square root)d/h-0.608]
Conditions required to produce sulphide corrosion cracking
Toughness
benefits of chromium - nickel and copper in alloy steels

42. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Specific heat
velocity
Problem solving order
Work

43. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
Continuity flow
Problem solving order
White
The elastic limit of the material is not exceeded

44. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
The specific heat of the material
Stray current corrosion
White metal and bronze
Pm x A x L

45. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
polygon
Trapezium
110.6 kPa
Less than 90 degrees

46. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
0.0723
A = 4/3h2 [(square root)d/h-0.608]
Purpose of material balance
Specific heat

47. coefficient of superficial (area) expansion
Ammonia
Latent heat of evaporation
Ideal mechanical advantage
Gamma - coefficient of superficial = 2x coefficient of linear expansion

48. Force
Mass x acceleration (N)
70 MPa
Naperian (Natural) logarithms
velocity

49. The most common material used in making large industrial diesel engine pistons is...
ellipse
Boyle's law
Resultant
Cast iron

50. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Conditions required to produce sulphide corrosion cracking
benefits of copper
dryness fraction
Isosceles triangle