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Power Engineering

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. 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
effective pressure
Power
Purpose of P & IDs
Stray current corrosion

2. H2SO4 is the chemical formula for...
Conditions required to produce sulphide corrosion cracking
Sulfuric acid
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Pm x A x L x N

3. 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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4. Pythagoras' Theorem
Specific heat
Gamma - coefficient of superficial = 2x coefficient of linear expansion
A
A solution

5. Of a process or change taking place at constant temperature - PV = C
Isothermal
water equivalent
Less than 90 degrees
Ultimate stress/working stress

6. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Specific heat
hexagon
0.0723

7. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
A
Sensible heat
benefits of copper
1/2mv2 (kg x velocity(m/s))

8. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Pm x A x L x N
Charles Law
0.89

9. The precise measurement of heat flow out of a system for chemical and physical processes
Scalene triangle
benefits of chromium - nickel and copper in alloy steels
Calorimetry
8908 kJ

10. Straight angle
Specific heat
Exactly 180 degrees
Calorimetry
displacement

11. The factor of safety is always expressed...
161
As a ratio
Relative density
Transformed to different forms

12. A pinch of salt is added to a glass of water. The result is...
Hooke's Law
A
Total heat required for change of state
A solution

13. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
A
Naperian (Natural) logarithms
Rhombus
water equivalent

14. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Latent heat of evaporation
Pm x A x L
As a ratio
Heat engines

15. 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...
10.8 m N of W
elasticity
Continuity flow
Cast iron

16. The act or process of measuring
Rhombus
Mensuration
The elastic limit of the material is not exceeded
Boyle's law

17. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Malleability
latent heat of evaporation (vaporation)
520.72 kJ/kg
benefits of nickel

18. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
70 MPa
Coefficient of friction
basic oxygen process
Ammonia

19. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Less than 90 degrees
Isosceles triangle
linear motion relationships
Be the same at any point in the process

20. coefficient of expansion
Unified National
0.0723
A Greek letter alpha linear
Sulfuric acid

21. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
The specific heat of the material
hardness
Chlorides
Resultant

22. A triangle with two equal sides
Material balance
Isosceles triangle
elasticity
Ideal mechanical advantage

23. Orthographic projection means...
View of a cutting plane
polygon
0.0002
Complementary angles

24. Any two angles whose sum is 90
Complementary angles
effective pressure
57.48 mm
Power

25. A straight line that joins 2 points or circumference
Boyle's law
Chord
Work
Hooke's Law

26. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Divide the maximum load by the original cross - sectional area
basic oxygen process
110.6 kPa
Trapezoid

27. Acute angle
More than 90 degrees
Less than 90 degrees
hardness
Work

28. Area of a segment
Output power(W)/input power(W)
Trapezium
Naperian (Natural) logarithms
A = 4/3h2 [(square root)d/h-0.608]

29. The moment of a force about a point is...
General gas law
A twisting or turning effect
2.3026
elasticity

30. A quadrilateral with no parallel sides
Trapezium
M x g x h (kg x 9.81 m/s/s x height (m))
Increase
Stroke

31. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
26.81 m/s
179.02
520.72 kJ/kg
Work

32. Malleable cast iron is produced by...
Increase
Specific heat
Heating and cooling white cast iron at a controlled rate
Trapezium

33. Protons have a mass number of...
A = 4/3h2 [(square root)d/h-0.608]
Rhombus
One
More than 90 degrees

34. The force that is equal in magnitude but opposite in direction to the resultant force is called
Conditions required to produce sulphide corrosion cracking
The equilibrant
Exactly 180 degrees
Rhomboid

35. Change in tempereature where no heat in transferred - PV(supercript v) = C
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Complementary angles
Exactly 180 degrees
Adiabatic

36. A quadrilateral with two parallel sides
0.0723
Stroke
Trapezoid
A / SinA = b / SinB = c / SinC

37. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Latent heat of evaporation
Areas of sectors (bounded by 2 radii and arc between them)
View of a cutting plane
8908 kJ

38. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Less than 90 degrees
Transformed to different forms
520.72 kJ/kg
Relative density

39. 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% -
distance
Sulfuric acid
benefits of nickel
A

40. Kinetic energy (Ek)
1/2mv2 (kg x velocity(m/s))
Conditions required to produce sulphide corrosion cracking
Ultimate stress/working stress
Heating and cooling white cast iron at a controlled rate

41. 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
Permanent and removable
0.0723
Stress corrosion cracking
M x g x h (kg x 9.81 m/s/s x height (m))

42. A gas occupies 8.62 m3 at 1800 kPa and 26
Permanent and removable
161
45 kN
Material balance

43. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
The elastic limit of the material is not exceeded
More than 90 degrees
Tangent
Rhombus

44. As the cosine decreases - the...
polytropic
Value of the angle increases
Octagon
Conditions required to produce sulphide corrosion cracking

45. A 6 m long cantilever beam carries a concentrated load of 45 kN at its free end. What is the shear force at the wall?
45 kN
A / SinA = b / SinB = c / SinC
distance
Work

46. A closed plane figure bounded by straight sides
polygon
Be the same at any point in the process
Stroke
The elastic limit of the material is not exceeded

47. Whether a material will break under sudden impact or hard blow
A
Octagon
Toughness
1 cm

48. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
Unified National
hardness
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only

49. Potential energy (Ep)
M x g x h (kg x 9.81 m/s/s x height (m))
Cast iron
A Greek letter alpha linear
Purpose of material balance

50. A parallelogram with four equal sides
Coefficient of friction
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Rhombus
0.0723

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Power Engineering

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