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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. Refers to change in the position of the body - relative to some reference point - not concerned with actual distance traveled - a vector quantity with magnitude and direction
displacement
Rhombus
Mass x acceleration (N)
Total heat required for change of state

2. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
A. sine of 90
1 cm
179.02
70 MPa

3. A quadrilateral with no parallel sides
Details of P & IDs
Trapezium
polytropic
One

4. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
26.81 m/s
Less than 90 degrees
benefits of chromium - nickel and copper in alloy steels
linear motion relationships

5. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
0.89
57.48 mm
26.81 m/s
benefits of chromium

6. Expansion of a gas is said to be adiabatic when expansion takes place at...
The elastic limit of the material is not exceeded
Ammonia
Rhombus
Falling temperature

7. 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...
Cast iron
As a ratio
One angle is exactly 90 degrees
Latent heat of evaporation

8. Of a process or change taking place at constant temperature - PV = C
As a ratio
Isothermal
A number with the necessary unit
Naperian (Natural) logarithms

9. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
0.89
Power
Mass
Chlorides

10. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Malleability
Work
latent heat of evaporation (vaporation)
Mass x acceleration (N)

11. 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...
0.0723
hardness
10.8 m N of W
Specific heat

12. PFDs
70 MPa
Stray current corrosion
benefits of nickel
Process flow drawing

13. Velocity ratio is...
Rhombus
Be the same at any point in the process
Ideal mechanical advantage
57.48 mm

14. coefficient of expansion
Stress corrosion cracking
Tangent
A Greek letter alpha linear
A

15. Factor of safety
Ultimate stress/working stress
Opposite side / hypotenuse
4.4 m/s
45 kN

16. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems
1/2mv2 (kg x velocity(m/s))
A. sine of 90
Purpose of P & IDs
Complementary angles

17. A quadrilateral with two parallel sides
distance
Trapezoid
Hooke's Law
Malleability

18. The act or process of measuring
Mensuration
Mass x acceleration (N)
latent heat of evaporation (vaporation)
A twisting or turning effect

19. The factor of safety is always expressed...
0.89
Exactly 180 degrees
Areas of sectors (bounded by 2 radii and arc between them)
As a ratio

20. H2SO4 is the chemical formula for...
Sulfuric acid
Details of P & IDs
Isothermal
basic oxygen process

21. Whether a material will break under sudden impact or hard blow
benefits of chromium
That is supported at two ends
Toughness
elasticity

22. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
Coefficient of friction
Transformed to different forms
Resultant

23. Mechanical efficiency
Octagon
Chord
Output power(W)/input power(W)
View of a cutting plane

24. Is the required to change a unit mass from a gas to liquid or liquid to a gas
latent heat of evaporation (vaporation)
Stress corrosion cracking
Boyle's law
Ultimate stress/working stress

25. Orthographic projection means...
Purpose of P & IDs
View of a cutting plane
A. sine of 90
Composite material

26. The term _____ is used as a measure of the quantity of matter.
Sulfuric acid
Mass
One angle is exactly 90 degrees
Toughness

27. Protons have a mass number of...
Chlorides
One
ellipse
Permanent and removable

28. A parallelogram with four equal sides
Rhombus
0.0723
Unified National
Tangent

29. One is the trigonometric value of...
Purpose of material balance
A. sine of 90
A twisting or turning effect
1 cm

30. Change in tempereature where no heat in transferred - PV(supercript v) = C
Toughness
Greater than 180 degrees
Adiabatic
Trapezium

31. A triangle with no two sides of equal length
Scalene triangle
Stroke
displacement
1 cm

32. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Unified National
8908 kJ
26.81 m/s
Less than 90 degrees

33. Sine Rule
One
A / SinA = b / SinB = c / SinC
Opposite side / hypotenuse
One angle is exactly 90 degrees

34. Any two angles whose sum is 90
Tangent
1 cm
Permanent and removable
Complementary angles

35. 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
Ultimate stress/working stress
velocity
Coefficient of friction
Naperian (Natural) logarithms

36. Stainless fails due to...
ellipse
Chlorides
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
More than 90 degrees

37. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Naperian (Natural) logarithms
Mass x acceleration (N)
Complementary angles
The equilibrant

38. Reflex angle
Octagon
water equivalent
Greater than 180 degrees
Chord

39. The most common material used in making large industrial diesel engine pistons is...
Cast iron
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
A number with the necessary unit
Scalene triangle

40. 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
Be the same at any point in the process
Dividing the ultimate strength by the factor of safety
Conditions required to produce sulphide corrosion cracking
Rhomboid

41. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
ellipse
110.6 kPa
Charles Law
Less than 90 degrees

42. The most common thread used in North America on fasteners such as bolts - is the...
The elastic limit of the material is not exceeded
Unified National
Continuity flow
More than 90 degrees

43. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Trapezoid
polytropic
26.81 m/s
1 cm

44. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
One angle is exactly 90 degrees
Stray current corrosion
As a ratio
Trapezium

45. Obtuse angle
1/2mv2 (kg x velocity(m/s))
A. sine of 90
As a ratio
More than 90 degrees

46. Acute angle
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
White metal and bronze
M x g x h (kg x 9.81 m/s/s x height (m))
Less than 90 degrees

47. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Isosceles triangle
Increase
Gamma - coefficient of superficial = 2x coefficient of linear expansion
As a ratio

48. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
Isothermal
Boyle's law
polygon
hexagon

49. Work per power stroke (J)
Material balance
That is supported at two ends
Rhomboid
Pm x A x L

50. The precise measurement of heat flow out of a system for chemical and physical processes
Divide the maximum load by the original cross - sectional area
Ideal mechanical advantage
Transformed to different forms
Calorimetry

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Power Engineering

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