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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. The ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface u = tan(thada) - coefficient of friction is equal to the tangent of friction angle
Value of the angle increases
Coefficient of friction
polytropic
Falling temperature

2. 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
Latent heat of evaporation
Continuity flow
Boyle's law
Ideal mechanical advantage

3. Pythagoras' Theorem
A
Specific heat
Falling temperature
The equilibrant

4. A parallelogram with four equal sides
Rhombus
White metal and bronze
As a ratio
Purpose of P & IDs

5. P & IDs
A twisting or turning effect
Mechanical flow diagrams
The specific heat of the material
distance

6. 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
Purpose of P & IDs
Octagon
benefits of chromium
General gas law

7. Energy can be...
Exactly 180 degrees
Hooke's Law
Transformed to different forms
Sensible heat

8. The temperature of saturated steam vapor at 980 kPa is...
179.02
70 MPa
A
Composite material

9. Ratio of the opposite to the adjacent side of a right- angled triangle
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Toughness
Heat engines
Tangent

10. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Charles Law
General gas law
26.81 m/s
0.89

11. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
70 MPa
That is supported at two ends
Heat engines
1/2mv2 (kg x velocity(m/s))

12. The classes of fastening devices are...
One angle is exactly 90 degrees
Cathodic protection system
Permanent and removable
One

13. Force - work done - power - mechanical efficiency
Problem solving order
Relative density
Celsius
0.89

14. Sine Rule
179.02
4.4 m/s
polygon
A / SinA = b / SinB = c / SinC

15. A parallelogram with adjacent sides of unequal lengths
Cathodic protection system
Relative density
Rhomboid
Trapezoid

16. A straight line that joins 2 points or circumference
Latent heat of evaporation
View of a cutting plane
Output power(W)/input power(W)
Chord

17. Of a process or change taking place at constant temperature - PV = C
To calculate power from an engine
Isothermal
Power
The specific heat of the material

18. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Stray current corrosion
The specific heat of the material
Continuity flow

19. Potential energy (Ep)
110.6 kPa
Problem solving order
Adiabatic
M x g x h (kg x 9.81 m/s/s x height (m))

20. A triangle with no two sides of equal length
Stroke
45 kN
Heating and cooling white cast iron at a controlled rate
Scalene triangle

21. Area of a segment
To calculate power from an engine
Cast iron
A = 4/3h2 [(square root)d/h-0.608]
M x g x h (kg x 9.81 m/s/s x height (m))

22. Steam turbine bearings are usually made of...
Relative density
Mensuration
White metal and bronze
Naperian (Natural) logarithms

23. One is the trigonometric value of...
A. sine of 90
hexagon
Total heat required for change of state
A solution

24. Is the required to change a unit mass from a gas to liquid or liquid to a gas
45 kN
ellipse
latent heat of evaporation (vaporation)
As a ratio

25. The precise measurement of heat flow out of a system for chemical and physical processes
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Scalene triangle
Calorimetry
Value of the angle increases

26. The ability to return to its original shape after an external force has been removed
0.0723
elasticity
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Specific heat

27. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
0.0723
Work
Continuity flow
Value of the angle increases

28. Kinetic energy (Ek)
1/2mv2 (kg x velocity(m/s))
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Composite material
A Greek letter alpha linear

29. Mechanical efficiency
Mass
A solution
Malleability
Output power(W)/input power(W)

30. Straight angle
A twisting or turning effect
Specific heat
White metal and bronze
Exactly 180 degrees

31. Force
Isosceles triangle
ellipse
Mass x acceleration (N)
Coefficient of friction

32. 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
2.3026
0.0723
Mechanical flow diagrams
To calculate power from an engine

33. coefficient of superficial (area) expansion
Gamma - coefficient of superficial = 2x coefficient of linear expansion
The equilibrant
Sensible heat
Stress corrosion cracking

34. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Unified National
Mechanical flow diagrams
Mass x acceleration (N)
520.72 kJ/kg

35. 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
110.6 kPa
hardness
ellipse
Isothermal

36. Copper fails due to...
A twisting or turning effect
dryness fraction
Ammonia
linear motion relationships

37. The moment of a force about a point is...
Sulfuric acid
Composite material
A twisting or turning effect
Heat engines

38. The factor of safety is always expressed...
Purpose of material balance
Transformed to different forms
Output power(W)/input power(W)
As a ratio

39. The ratio of the density of a substance to the density of a standard substance at the same temperature and pressure - the ratio of the density of the substance to the density of the substance to the density of water
Composite material
Relative density
Heat engines
Work

40. 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% -
benefits of nickel
Sensible heat
8908 kJ
benefits of chromium

41. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
M x g x h (kg x 9.81 m/s/s x height (m))
Stray current corrosion
Exactly 180 degrees
Problem solving order

42. Change in tempereature where no heat in transferred - PV(supercript v) = C
effective pressure
Total heat required for change of state
velocity
Adiabatic

43. Resistance to wear - abrasion and penetration
Stress corrosion cracking
hardness
Power
Chord

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

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45. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Total heat required for change of state
dryness fraction
Mass x acceleration (N)
Gamma - coefficient of superficial = 2x coefficient of linear expansion

46. When calculating the ultimate stress of a material - we should
Mass
Divide the maximum load by the original cross - sectional area
A number with the necessary unit
White

47. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
One angle is exactly 90 degrees
A = 4/3h2 [(square root)d/h-0.608]
Specific heat
Rhomboid

48. 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
distance
Divide the maximum load by the original cross - sectional area
benefits of chromium
Stray current corrosion

49. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
A number with the necessary unit
Stray current corrosion
benefits of chromium - nickel and copper in alloy steels
Cast iron

50. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Octagon
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
General gas law
110.6 kPa