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Power Engineering

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. Stainless fails due to...
Chlorides
Problem solving order
velocity
M x g x h (kg x 9.81 m/s/s x height (m))

2. Copper fails due to...
Continuity flow
Ammonia
polytropic
More than 90 degrees

3. coefficient of superficial (area) expansion
57.48 mm
A
Specific heat
Gamma - coefficient of superficial = 2x coefficient of linear expansion

4. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
To calculate power from an engine
Specific heat
latent heat of evaporation (vaporation)
4.4 m/s

5. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Output power(W)/input power(W)
Increase
elasticity
Sensible heat

6. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Naperian (Natural) logarithms
Rhomboid
Octagon

7. Change in tempereature where no heat in transferred - PV(supercript v) = C
One angle is exactly 90 degrees
Adiabatic
More than 90 degrees
Continuity flow

8. Potential energy (Ep)
Cast iron
Sulfuric acid
distance
M x g x h (kg x 9.81 m/s/s x height (m))

9. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
latent heat of evaporation (vaporation)
Rhomboid
8908 kJ
hexagon

10. Sine Rule
A / SinA = b / SinB = c / SinC
The equilibrant
Falling temperature
Continuity flow

11. Of a process or change taking place at constant temperature - PV = C
Specific heat
Isothermal
Trapezoid
A solution

12. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
Exactly 180 degrees
A = 4/3h2 [(square root)d/h-0.608]
polytropic

13. The term _____ is used as a measure of the quantity of matter.
Unified National
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Mass
1/2mv2 (kg x velocity(m/s))

14. H2SO4 is the chemical formula for...
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Hooke's Law
ellipse
Sulfuric acid

15. 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...
Latent heat of evaporation
2.3026
Rhombus
Cast iron

16. One is the trigonometric value of...
Isosceles triangle
Complementary angles
Chlorides
A. sine of 90

17. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
To calculate power from an engine
8908 kJ
161
Areas of sectors (bounded by 2 radii and arc between them)

18. Velocity ratio is...
Sulfuric acid
Dividing the ultimate strength by the factor of safety
distance
Ideal mechanical advantage

19. Obtuse angle
benefits of chromium - nickel and copper in alloy steels
More than 90 degrees
0.0723
70 MPa

20. coefficient of volumetric expansion

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21. The most common scale in use is the...
ellipse
Specific heat
General gas law
Celsius

22. 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% -
dryness fraction
Process flow drawing
benefits of nickel
Ammonia

23. PFDs
General gas law
benefits of nickel
Process flow drawing
Areas of sectors (bounded by 2 radii and arc between them)

24. Ratio of the opposite to the adjacent side of a right- angled triangle
2.3026
Permanent and removable
Tangent
4.4 m/s

25. In the equation 0.004 + D = 0.0042 - the value of D is...
polytropic
0.0002
Latent heat of evaporation
Ideal mechanical advantage

26. Compounds classified as salts may have the following characteristics
Scalene triangle
Chord
Power
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue

27. Straight angle
Stroke
Exactly 180 degrees
A. sine of 90
Rhomboid

28. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
161
57.48 mm
White metal and bronze
Be the same at any point in the process

29. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Heat engines
Specific heat
Work

30. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Exactly 180 degrees
0.89
water equivalent
basic oxygen process

31. 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
0.0723
displacement
A
Total heat required for change of state

32. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d
Cathodic protection system
ellipse
4.4 m/s
Hooke's Law

33. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
A number with the necessary unit
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Isosceles triangle
26.81 m/s

34. A quadrilateral with no parallel sides
Ultimate stress/working stress
Trapezium
That is supported at two ends
polygon

35. As the cosine decreases - the...
Unified National
Total heat required for change of state
Value of the angle increases
Octagon

36. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
45 kN
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
displacement
basic oxygen process

37. 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
0.0002
Rhomboid
hardness
benefits of chromium

38. 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
ellipse
0.0723
The elastic limit of the material is not exceeded
Octagon

39. 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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40. Being made of 2 or more substances creating unique characteristics and properties when combine
Composite material
110.6 kPa
dryness fraction
Cathodic protection system

41. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Specific heat
latent heat of evaporation (vaporation)
Unified National
Areas of sectors (bounded by 2 radii and arc between them)

42. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
Ideal mechanical advantage
A
Increase

43. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
One
elasticity
0.0002
Be the same at any point in the process

44. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
To calculate power from an engine
Sulfuric acid
One
Specific heat

45. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
benefits of chromium - nickel and copper in alloy steels
Transformed to different forms
Specific heat
distance

46. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Specific heat
benefits of nickel
Mass
polygon

47. coefficient of expansion
Greater than 180 degrees
Work
A Greek letter alpha linear
Power

48. Right angle
Unified National
One angle is exactly 90 degrees
45 kN
Be the same at any point in the process

49. Protons have a mass number of...
10.8 m N of W
Opposite side / hypotenuse
polygon
One

50. The most common thread used in North America on fasteners such as bolts - is the...
Unified National
ellipse
Stray current corrosion
velocity