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Power Engineering

Instructions:

Answer 50 questions in 15 minutes.
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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. One is the trigonometric value of...
Stray current corrosion
benefits of chromium
Isothermal
A. sine of 90

2. Copper fails due to...
The specific heat of the material
White
Ammonia
A. sine of 90

3. Straight angle
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Exactly 180 degrees
Permanent and removable
Scalene triangle

4. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
0.89
Material balance
Purpose of material balance
Isosceles triangle

5. A 10 m long steel pipe when heated to increase its temperature by 85
brinell hardness test
Falling temperature
A = 4/3h2 [(square root)d/h-0.608]
1 cm

6. Force - work done - power - mechanical efficiency
Naperian (Natural) logarithms
Problem solving order
polytropic
Areas of sectors (bounded by 2 radii and arc between them)

7. The precise measurement of heat flow out of a system for chemical and physical processes
Specific heat
Adiabatic
Calorimetry
Work

8. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
brinell hardness test
Details of P & IDs
Less than 90 degrees
hexagon

9. A quadrilateral with two parallel sides
Trapezoid
Mechanical flow diagrams
2.3026
1 cm

10. Ability to withstand deformation above elastic limit under compression without failure
10.8 m N of W
45 kN
Malleability
Charles Law

11. Acute angle
A solution
Stray current corrosion
Less than 90 degrees
Chlorides

12. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
dryness fraction
Naperian (Natural) logarithms
Specific heat
A Greek letter alpha linear

13. The most common scale in use is the...
Cathodic protection system
Celsius
benefits of chromium - nickel and copper in alloy steels
26.81 m/s

14. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Rhombus
Scalene triangle
57.48 mm
Stroke

15. Velocity ratio is...
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Cathodic protection system
Ideal mechanical advantage
That is supported at two ends

16. In the equation 0.004 + D = 0.0042 - the value of D is...
0.0002
Specific heat
Mass
1 cm

17. 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...
A Greek letter alpha linear
Hooke's Law
Latent heat of evaporation
Be the same at any point in the process

18. 1. In a right angle triangle - the sine of an acute angle is equal to...
Opposite side / hypotenuse
hardness
The elastic limit of the material is not exceeded
10.8 m N of W

19. 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
Calorimetry
Specific heat
Dividing the ultimate strength by the factor of safety

20. Whether a material will break under sudden impact or hard blow
That is supported at two ends
4.4 m/s
1/2mv2 (kg x velocity(m/s))
Toughness

21. Orthographic projection means...
View of a cutting plane
As a ratio
8908 kJ
A solution

22. 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
ellipse
179.02
Relative density
Specific heat

23. Protons have a mass number of...
One
Purpose of P & IDs
Process flow drawing
Toughness

24. A closed plane figure bounded by straight sides
polygon
Work
Mechanical flow diagrams
Rhomboid

25. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Trapezium
Dividing the ultimate strength by the factor of safety
Value of the angle increases
26.81 m/s

26. A pinch of salt is added to a glass of water. The result is...
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
A solution
Naperian (Natural) logarithms
A. sine of 90

27. H2SO4 is the chemical formula for...
Calorimetry
Sulfuric acid
Rhomboid
Divide the maximum load by the original cross - sectional area

28. Ratio of the opposite to the adjacent side of a right- angled triangle
Cathodic protection system
Ammonia
Tangent
4.4 m/s

29. Mechanical efficiency
Relative density
0.0723
Rhomboid
Output power(W)/input power(W)

30. A 1 N weight has a kinetic energy of 1 J when its speed is...
The specific heat of the material
4.4 m/s
Stray current corrosion
Trapezoid

31. 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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32. Obtuse angle
More than 90 degrees
Material balance
General gas law
Stress corrosion cracking

33. The moment of a force about a point is...
A twisting or turning effect
Less than 90 degrees
The specific heat of the material
A / SinA = b / SinB = c / SinC

34. The rate at which heat flow through a slab of a material does not depend on...
The specific heat of the material
The equilibrant
Resultant
A. sine of 90

35. As the cosine decreases - the...
Less than 90 degrees
110.6 kPa
Value of the angle increases
0.0723

36. Safe working stress is determined by...
The equilibrant
Dividing the ultimate strength by the factor of safety
Resultant
Sulfuric acid

37. A quadrilateral with no parallel sides
Trapezium
Rhombus
Octagon
Be the same at any point in the process

38. A gas occupies 8.62 m3 at 1800 kPa and 26
The specific heat of the material
45 kN
0.0723
161

39. P & IDs
Increase
White
Mechanical flow diagrams
One angle is exactly 90 degrees

40. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Isosceles triangle
Increase
1 cm
Rhombus

41. Kinetic energy (Ek)
110.6 kPa
A number with the necessary unit
1/2mv2 (kg x velocity(m/s))
Dividing the ultimate strength by the factor of safety

42. Change in tempereature where no heat in transferred - PV(supercript v) = C
White
Stray current corrosion
Resultant
Adiabatic

43. 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
Hooke's Law
Continuity flow
The elastic limit of the material is not exceeded
Stress corrosion cracking

44. A parallelogram with adjacent sides of unequal lengths
26.81 m/s
Ideal mechanical advantage
ellipse
Rhomboid

45. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
The equilibrant
Calorimetry
White
Sensible heat

46. A triangle with two equal sides
Isosceles triangle
10.8 m N of W
displacement
Octagon

47. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
Heat engines
White
8908 kJ
A. sine of 90

48. 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
Isothermal
Coefficient of friction
179.02
water equivalent

49. Force
Cast iron
70 MPa
Mass x acceleration (N)
4.4 m/s

50. Is the required to change a unit mass from a gas to liquid or liquid to a gas
distance
179.02
Specific heat
latent heat of evaporation (vaporation)