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Power Engineering

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Copper fails due to...
4.4 m/s
Isothermal
Hooke's Law
Ammonia

2. Expansion of a gas is said to be adiabatic when expansion takes place at...
polytropic
A twisting or turning effect
Falling temperature
A = 4/3h2 [(square root)d/h-0.608]

3. One is the trigonometric value of...
View of a cutting plane
Coefficient of friction
A. sine of 90
Power

4. Factor of safety
As a ratio
Problem solving order
Ultimate stress/working stress
Sensible heat

5. A scalar quantity is one which has only magnitude and can be fully described by...
57.48 mm
Tangent
A number with the necessary unit
Mechanical flow diagrams

6. 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
A. sine of 90
Heating and cooling white cast iron at a controlled rate
Output power(W)/input power(W)

7. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Specific heat
water equivalent
Mass
Value of the angle increases

8. Steam turbine bearings are usually made of...
White metal and bronze
More than 90 degrees
Conditions required to produce sulphide corrosion cracking
A

9. 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
Divide the maximum load by the original cross - sectional area
Ammonia
benefits of chromium - nickel and copper in alloy steels
Octagon

10. 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
View of a cutting plane
velocity
A. sine of 90
Continuity flow

11. H2SO4 is the chemical formula for...
Pm x A x L
Sulfuric acid
Conditions required to produce sulphide corrosion cracking
Greater than 180 degrees

12. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
dryness fraction
benefits of chromium - nickel and copper in alloy steels
Divide the maximum load by the original cross - sectional area
M x g x h (kg x 9.81 m/s/s x height (m))

13. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Heating and cooling white cast iron at a controlled rate
effective pressure
Specific heat
1/2mv2 (kg x velocity(m/s))

14. When classifying beams - the term simple beam refers to a beam
One angle is exactly 90 degrees
Toughness
That is supported at two ends
Mensuration

15. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
The equilibrant
Stray current corrosion
Chlorides
Isothermal

16. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Mechanical flow diagrams
Unified National
Stroke
Exactly 180 degrees

17. Work per power stroke (J)
Pm x A x L
Celsius
Details of P & IDs
Increase

18. The rate at which heat flow through a slab of a material does not depend on...
Areas of sectors (bounded by 2 radii and arc between them)
Rhombus
A number with the necessary unit
The specific heat of the material

19. 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% -
A Greek letter alpha linear
benefits of nickel
The specific heat of the material
More than 90 degrees

20. 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...
Output power(W)/input power(W)
10.8 m N of W
Latent heat of evaporation
M x g x h (kg x 9.81 m/s/s x height (m))

21. coefficient of volumetric expansion

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22. Acute angle
More than 90 degrees
velocity
General gas law
Less than 90 degrees

23. Micro organisms promote corrosion...
Mass x acceleration (N)
polytropic
2.3026
Under deposit corrosion - enhanced oxygen generation - contact of live organisms

24. Kinetic energy (Ek)
Stray current corrosion
1/2mv2 (kg x velocity(m/s))
26.81 m/s
Latent heat of evaporation

25. Obtuse angle
8908 kJ
Sensible heat
As a ratio
More than 90 degrees

26. A quadrilateral with no parallel sides
latent heat of evaporation (vaporation)
Mensuration
elasticity
Trapezium

27. Right angle
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
One angle is exactly 90 degrees
polytropic
ellipse

28. As the cosine decreases - the...
Value of the angle increases
Mass
179.02
Specific heat

29. The temperature of saturated steam vapor at 980 kPa is...
A
179.02
Opposite side / hypotenuse
Mass x acceleration (N)

30. 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
Latent heat of evaporation
Rhombus
Mass x acceleration (N)
Relative density

31. Velocity ratio is...
Malleability
Rhomboid
Ideal mechanical advantage
Problem solving order

32. Energy can be...
benefits of chromium
110.6 kPa
Transformed to different forms
Increase

33. The act or process of measuring
Mensuration
A Greek letter alpha linear
Output power(W)/input power(W)
The elastic limit of the material is not exceeded

34. A gas occupies 8.62 m3 at 1800 kPa and 26
161
Hooke's Law
Be the same at any point in the process
Calorimetry

35. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
The equilibrant
Continuity flow
Sulfuric acid
dryness fraction

36. 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
A twisting or turning effect
0.0002
A. sine of 90

37. The moment of a force about a point is...
Adiabatic
A twisting or turning effect
26.81 m/s
Boyle's law

38. Force - work done - power - mechanical efficiency
2.3026
Chlorides
Problem solving order
latent heat of evaporation (vaporation)

39. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
benefits of copper
The equilibrant
velocity
Specific heat

40. A parallelogram with adjacent sides of unequal lengths
displacement
Rhomboid
Composite material
hexagon

41. Sine Rule
Composite material
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Be the same at any point in the process
A / SinA = b / SinB = c / SinC

42. Any two angles whose sum is 90
Complementary angles
ellipse
Trapezium
Naperian (Natural) logarithms

43. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Ideal mechanical advantage
8908 kJ
effective pressure
A number with the necessary unit

44. A straight line that joins 2 points or circumference
Transformed to different forms
Chord
Trapezoid
Trapezium

45. Stainless fails due to...
Divide the maximum load by the original cross - sectional area
Stray current corrosion
brinell hardness test
Chlorides

46. A triangle with no two sides of equal length
Hooke's Law
45 kN
Purpose of P & IDs
Scalene triangle

47. Potential energy (Ep)
Purpose of P & IDs
dryness fraction
0.0002
M x g x h (kg x 9.81 m/s/s x height (m))

48. PFDs
To calculate power from an engine
Process flow drawing
basic oxygen process
The elastic limit of the material is not exceeded

49. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Naperian (Natural) logarithms
basic oxygen process
Continuity flow
Adiabatic

50. Negative terminal of the rectifier must always be connected to the structure that is being protected
Coefficient of friction
Cathodic protection system
Specific heat
The elastic limit of the material is not exceeded