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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. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
The equilibrant
brinell hardness test
Celsius

2. Safe working stress is determined by...
Toughness
Dividing the ultimate strength by the factor of safety
Malleability
Scalene triangle

3. Kinetic energy (Ek)
Toughness
Composite material
Gamma - coefficient of superficial = 2x coefficient of linear expansion
1/2mv2 (kg x velocity(m/s))

4. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Details of P & IDs
That is supported at two ends
Hooke's Law
0.89

5. 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
Problem solving order
Trapezoid
70 MPa

6. A gas occupies 8.62 m3 at 1800 kPa and 26
Opposite side / hypotenuse
Heating and cooling white cast iron at a controlled rate
110.6 kPa
161

7. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
70 MPa
Isosceles triangle
Charles Law
benefits of chromium

8. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Unified National
The elastic limit of the material is not exceeded
dryness fraction
Transformed to different forms

9. H2SO4 is the chemical formula for...
2.3026
elasticity
Sulfuric acid
To calculate power from an engine

10. Reflex angle
Greater than 180 degrees
Chord
Composite material
Charles Law

11. Pythagoras' Theorem
benefits of nickel
Latent heat of evaporation
A
The equilibrant

12. The precise measurement of heat flow out of a system for chemical and physical processes
45 kN
Calorimetry
benefits of chromium
Trapezium

13. Cosine rule
Dividing the ultimate strength by the factor of safety
A
Unified National
brinell hardness test

14. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Power
Less than 90 degrees
161
Specific heat

15. 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
Relative density
Ideal mechanical advantage
polytropic
Specific heat

16. Protons have a mass number of...
Areas of sectors (bounded by 2 radii and arc between them)
latent heat of evaporation (vaporation)
One
One angle is exactly 90 degrees

17. When calculating the ultimate stress of a material - we should
Trapezoid
Divide the maximum load by the original cross - sectional area
Work
Gamma - coefficient of superficial = 2x coefficient of linear expansion

18. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Relative density
Areas of sectors (bounded by 2 radii and arc between them)
basic oxygen process
Ideal mechanical advantage

19. A parallelogram with adjacent sides of unequal lengths
Relative density
Rhomboid
A
Ultimate stress/working stress

20. The classes of fastening devices are...
70 MPa
520.72 kJ/kg
hexagon
Permanent and removable

21. Negative terminal of the rectifier must always be connected to the structure that is being protected
Mechanical flow diagrams
Cathodic protection system
Octagon
Mensuration

22. 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
A number with the necessary unit
Be the same at any point in the process
Mensuration
Octagon

23. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Specific heat
45 kN
8908 kJ
Mensuration

24. Potential energy (Ep)
M x g x h (kg x 9.81 m/s/s x height (m))
26.81 m/s
Mass
Boyle's law

25. Work per power stroke (J)
520.72 kJ/kg
Pm x A x L
Toughness
hexagon

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

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27. 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
Material balance
Dividing the ultimate strength by the factor of safety
0.0723
Relative density

28. The term _____ is used as a measure of the quantity of matter.
Mass
ellipse
To calculate power from an engine
Stray current corrosion

29. Copper fails due to...
Ammonia
Be the same at any point in the process
A number with the necessary unit
Adiabatic

30. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
hexagon
A / SinA = b / SinB = c / SinC
Rhomboid
Value of the angle increases

31. coefficient of superficial (area) expansion
hexagon
179.02
Gamma - coefficient of superficial = 2x coefficient of linear expansion
M x g x h (kg x 9.81 m/s/s x height (m))

32. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
effective pressure
water equivalent
A. sine of 90

33. The factor of safety is always expressed...
Relative density
179.02
benefits of nickel
As a ratio

34. Compounds classified as salts may have the following characteristics
Toughness
10.8 m N of W
Resultant
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue

35. 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...
Latent heat of evaporation
More than 90 degrees
A
Complementary angles

36. Resistance to wear - abrasion and penetration
hardness
0.0002
Ideal mechanical advantage
Isothermal

37. A triangle with two equal sides
Isosceles triangle
Heating and cooling white cast iron at a controlled rate
A = 4/3h2 [(square root)d/h-0.608]
One angle is exactly 90 degrees

38. A straight line that joins 2 points or circumference
Ultimate stress/working stress
Chord
Isothermal
To calculate power from an engine

39. P & IDs
hexagon
Mechanical flow diagrams
Composite material
Ultimate stress/working stress

40. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
Continuity flow
benefits of chromium - nickel and copper in alloy steels
velocity
Exactly 180 degrees

41. A scalar quantity is one which has only magnitude and can be fully described by...
A number with the necessary unit
More than 90 degrees
Relative density
0.0002

42. 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
Gamma - coefficient of superficial = 2x coefficient of linear expansion
M x g x h (kg x 9.81 m/s/s x height (m))
benefits of chromium - nickel and copper in alloy steels
Coefficient of friction

43. The most common scale in use is the...
0.0723
Isosceles triangle
Areas of sectors (bounded by 2 radii and arc between them)
Celsius

44. Malleable cast iron is produced by...
Complementary angles
Heating and cooling white cast iron at a controlled rate
Stray current corrosion
Malleability

45. The ability to return to its original shape after an external force has been removed
elasticity
A. sine of 90
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
That is supported at two ends

46. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Specific heat
Scalene triangle
26.81 m/s
57.48 mm

47. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
70 MPa
Ultimate stress/working stress
Power
Trapezoid

48. coefficient of volumetric expansion

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49. Whether a material will break under sudden impact or hard blow
Divide the maximum load by the original cross - sectional area
Toughness
Stray current corrosion
Transformed to different forms

50. 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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