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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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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. coefficient of superficial (area) expansion
Latent heat of evaporation
Gamma - coefficient of superficial = 2x coefficient of linear expansion
0.0723
26.81 m/s

2. Area of a segment
A. sine of 90
Divide the maximum load by the original cross - sectional area
A = 4/3h2 [(square root)d/h-0.608]
Stray current corrosion

3. Kinetic energy (Ek)
70 MPa
Increase
1/2mv2 (kg x velocity(m/s))
Trapezium

4. Is the required to change a unit mass from a gas to liquid or liquid to a gas
latent heat of evaporation (vaporation)
Power
benefits of chromium
More than 90 degrees

5. A 1 N weight has a kinetic energy of 1 J when its speed is...
Be the same at any point in the process
4.4 m/s
Hooke's Law
A / SinA = b / SinB = c / SinC

6. Work per second
Tangent
The specific heat of the material
0.0723
Pm x A x L x N

7. 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
1 cm
benefits of chromium
benefits of nickel
0.89

8. Protons have a mass number of...
Octagon
polytropic
One
57.48 mm

9. u = initial velocity (m/s) - v = final velocity (m/s) - t = time (s) - s = distance (m) - a = acceleration (m/s/s) - g = acceleration due to gravity (m/s/s)
linear motion relationships
Value of the angle increases
Specific heat
Stray current corrosion

10. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
M x g x h (kg x 9.81 m/s/s x height (m))
Details of P & IDs
polytropic

11. A triangle with no two sides of equal length
A
Scalene triangle
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
White metal and bronze

12. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Value of the angle increases
Power
Sensible heat
Stress corrosion cracking

13. A pinch of salt is added to a glass of water. The result is...
polygon
Ultimate stress/working stress
A solution
Sensible heat

14. Energy can be...
Power
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
10.8 m N of W
Transformed to different forms

15. PFDs
Complementary angles
520.72 kJ/kg
Process flow drawing
Under deposit corrosion - enhanced oxygen generation - contact of live organisms

16. Sine Rule
water equivalent
A / SinA = b / SinB = c / SinC
Stroke
110.6 kPa

17. The rate at which heat flow through a slab of a material does not depend on...
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
displacement
The specific heat of the material
Greater than 180 degrees

18. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
White
Stroke
2.3026
Mechanical flow diagrams

19. 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
Transformed to different forms
0.0723
Stress corrosion cracking
Mensuration

20. Steam turbine bearings are usually made of...
benefits of copper
Dividing the ultimate strength by the factor of safety
Cathodic protection system
White metal and bronze

21. A scalar quantity is one which has only magnitude and can be fully described by...
A number with the necessary unit
As a ratio
A / SinA = b / SinB = c / SinC
Sensible heat

22. The ability to return to its original shape after an external force has been removed
Areas of sectors (bounded by 2 radii and arc between them)
45 kN
elasticity
benefits of chromium - nickel and copper in alloy steels

23. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
The elastic limit of the material is not exceeded
Problem solving order
Adiabatic

24. The act or process of measuring
Mensuration
basic oxygen process
benefits of chromium - nickel and copper in alloy steels
brinell hardness test

25. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
View of a cutting plane
0.89
Cast iron
Gamma - coefficient of superficial = 2x coefficient of linear expansion

26. Right angle
One angle is exactly 90 degrees
hexagon
Malleability
Specific heat

27. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
Pm x A x L
One
velocity

28. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Increase
Coefficient of friction
Power
Process flow drawing

29. The factor of safety is always expressed...
Composite material
Adiabatic
Calorimetry
As a ratio

30. A closed plane figure bounded by straight sides
polygon
Falling temperature
8908 kJ
A

31. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Purpose of material balance
A twisting or turning effect
70 MPa
Rhomboid

32. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
polytropic
Value of the angle increases
45 kN
dryness fraction

33. 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...
Mechanical flow diagrams
8908 kJ
Latent heat of evaporation
110.6 kPa

34. Pythagoras' Theorem
That is supported at two ends
dryness fraction
A
Scalene triangle

35. The temperature of saturated steam vapor at 980 kPa is...
hexagon
10.8 m N of W
179.02
Cast iron

36. The precise measurement of heat flow out of a system for chemical and physical processes
A number with the necessary unit
Calorimetry
White metal and bronze
dryness fraction

37. Obtuse angle
Mass x acceleration (N)
A Greek letter alpha linear
As a ratio
More than 90 degrees

38. Micro organisms promote corrosion...
Falling temperature
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
70 MPa
General gas law

39. 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
A solution
A number with the necessary unit
Conditions required to produce sulphide corrosion cracking
4.4 m/s

40. The most common scale in use is the...
Details of P & IDs
brinell hardness test
Toughness
Celsius

41. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
White
Work
hardness
Hooke's Law

42. Work per power stroke (J)
A number with the necessary unit
110.6 kPa
Pm x A x L
That is supported at two ends

43. A quadrilateral with no parallel sides
Trapezium
Purpose of P & IDs
Calorimetry
Rhomboid

44. 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...
Ammonia
That is supported at two ends
One angle is exactly 90 degrees
10.8 m N of W

45. In the equation 0.004 + D = 0.0042 - the value of D is...
0.0002
Material balance
Pm x A x L
Under deposit corrosion - enhanced oxygen generation - contact of live organisms

46. Ability to withstand deformation above elastic limit under compression without failure
57.48 mm
Relative density
Increase
Malleability

47. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
70 MPa
26.81 m/s
Specific heat
Pm x A x L

48. A 10 m long steel pipe when heated to increase its temperature by 85
179.02
1 cm
Problem solving order
Naperian (Natural) logarithms

49. 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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50. Compounds classified as salts may have the following characteristics
Latent heat of evaporation
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
A number with the necessary unit
displacement

Can you answer 50 questions in 15 minutes?

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Power Engineering

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