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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. 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
8908 kJ
Isothermal
Permanent and removable
ellipse

2. Copper fails due to...
Details of P & IDs
Divide the maximum load by the original cross - sectional area
Ammonia
Octagon

3. Reflex angle
Stroke
One
Complementary angles
Greater than 180 degrees

4. 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...
Details of P & IDs
Exactly 180 degrees
Rhombus
Latent heat of evaporation

5. Moist hydrogen sulphide environment - hydrogen sulphide must be present - water - even trace amount - high strength steel - steel must be under tensile stress - either applied or residual
Latent heat of evaporation
10.8 m N of W
Calorimetry
Conditions required to produce sulphide corrosion cracking

6. A parallelogram with adjacent sides of unequal lengths
Trapezoid
Rhomboid
Rhombus
A / SinA = b / SinB = c / SinC

7. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Purpose of material balance
Conditions required to produce sulphide corrosion cracking
Chlorides

8. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
benefits of copper
hexagon
Naperian (Natural) logarithms
Power

9. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Resultant
A / SinA = b / SinB = c / SinC
Transformed to different forms
Work

10. When classifying beams - the term simple beam refers to a beam
A solution
Hooke's Law
Charles Law
That is supported at two ends

11. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
57.48 mm
General gas law
Increase
520.72 kJ/kg

12. Right angle
Trapezium
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
One angle is exactly 90 degrees
Falling temperature

13. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Opposite side / hypotenuse
water equivalent
8908 kJ
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only

14. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
70 MPa
Power
Ammonia

15. Straight angle
Unified National
Exactly 180 degrees
4.4 m/s
water equivalent

16. Steam turbine bearings are usually made of...
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
White metal and bronze
latent heat of evaporation (vaporation)
View of a cutting plane

17. Force
Purpose of P & IDs
Mass x acceleration (N)
Stress corrosion cracking
Pm x A x L x N

18. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
To calculate power from an engine
Output power(W)/input power(W)
Cast iron
Stroke

19. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
161
Gamma - coefficient of superficial = 2x coefficient of linear expansion
The elastic limit of the material is not exceeded
Pm x A x L x N

20. Malleable cast iron is produced by...
Hooke's Law
Opposite side / hypotenuse
Heating and cooling white cast iron at a controlled rate
8908 kJ

21. 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
Octagon
A twisting or turning effect
Ideal mechanical advantage
110.6 kPa

22. The temperature of saturated steam vapor at 980 kPa is...
179.02
Toughness
Cast iron
Mensuration

23. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
0.89
Chlorides
To calculate power from an engine
8908 kJ

24. When calculating the ultimate stress of a material - we should
Value of the angle increases
Trapezoid
Divide the maximum load by the original cross - sectional area
General gas law

25. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Stray current corrosion
520.72 kJ/kg
Coefficient of friction
Continuity flow

26. PFDs
Toughness
Process flow drawing
Pm x A x L
polytropic

27. Acute angle
Malleability
Less than 90 degrees
Complementary angles
Heat engines

28. Energy can be...
Heating and cooling white cast iron at a controlled rate
161
Transformed to different forms
Toughness

29. PVn(super script n) = C
polytropic
M x g x h (kg x 9.81 m/s/s x height (m))
Purpose of material balance
Isosceles triangle

30. The most common thread used in North America on fasteners such as bolts - is the...
Unified National
1/2mv2 (kg x velocity(m/s))
General gas law
Divide the maximum load by the original cross - sectional area

31. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
White
brinell hardness test
Trapezoid

32. A triangle with no two sides of equal length
Areas of sectors (bounded by 2 radii and arc between them)
Stroke
Scalene triangle
A. sine of 90

33. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
26.81 m/s
520.72 kJ/kg
effective pressure
Adiabatic

34. Stainless fails due to...
Work
Chlorides
Ammonia
M x g x h (kg x 9.81 m/s/s x height (m))

35. Mechanical efficiency
Adiabatic
Mass x acceleration (N)
Output power(W)/input power(W)
A

36. A 1 N weight has a kinetic energy of 1 J when its speed is...
Rhomboid
A twisting or turning effect
4.4 m/s
Chord

37. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Malleability
0.0002
Specific heat
0.89

38. A closed plane figure bounded by straight sides
polygon
Value of the angle increases
Cast iron
0.0002

39. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Ammonia
Unified National
General gas law
8908 kJ

40. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Rhombus
Isosceles triangle
110.6 kPa
M x g x h (kg x 9.81 m/s/s x height (m))

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

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42. The classes of fastening devices are...
Permanent and removable
View of a cutting plane
A twisting or turning effect
Material balance

43. The force that is equal in magnitude but opposite in direction to the resultant force is called
1/2mv2 (kg x velocity(m/s))
Power
The equilibrant
Relative density

44. Sine Rule
Scalene triangle
Trapezium
The equilibrant
A / SinA = b / SinB = c / SinC

45. Ratio of the opposite to the adjacent side of a right- angled triangle
Malleability
Complementary angles
Tangent
White

46. 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
Chord
polygon
Stress corrosion cracking
A

47. coefficient of superficial (area) expansion
Mechanical flow diagrams
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Purpose of P & IDs
Details of P & IDs

48. A 10 m long steel pipe when heated to increase its temperature by 85
water equivalent
1 cm
Process flow drawing
Details of P & IDs

49. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Pm x A x L
displacement
The specific heat of the material
Details of P & IDs

50. coefficient of expansion
Material balance
A number with the necessary unit
A Greek letter alpha linear
Opposite side / hypotenuse