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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. PV=nRT - Boyle's law and Charle's law combined
Composite material
Opposite side / hypotenuse
Boyle's law
General gas law

2. PVn(super script n) = C
Mass x acceleration (N)
Specific heat
Celsius
polytropic

3. Whether a material will break under sudden impact or hard blow
Less than 90 degrees
Toughness
0.89
Continuity flow

4. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Cathodic protection system
Sulfuric acid
Value of the angle increases
Power

5. A straight line that joins 2 points or circumference
0.0002
Be the same at any point in the process
Conditions required to produce sulphide corrosion cracking
Chord

6. Being made of 2 or more substances creating unique characteristics and properties when combine
White metal and bronze
8908 kJ
Composite material
Specific heat

7. A triangle with no two sides of equal length
Malleability
elasticity
0.0723
Scalene triangle

8. Compounds classified as salts may have the following characteristics
Relative density
Tangent
Isothermal
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue

9. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
One angle is exactly 90 degrees
Details of P & IDs
effective pressure
0.0723

10. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
A
Cast iron
Complementary angles

11. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
A / SinA = b / SinB = c / SinC
1/2mv2 (kg x velocity(m/s))
8908 kJ
Less than 90 degrees

12. 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
Heat engines
Calorimetry
Less than 90 degrees
Continuity flow

13. A triangle with two equal sides
Isosceles triangle
One
Heat engines
Conditions required to produce sulphide corrosion cracking

14. A parallelogram with adjacent sides of unequal lengths
Rhomboid
benefits of chromium - nickel and copper in alloy steels
4.4 m/s
Ideal mechanical advantage

15. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Total heat required for change of state
Mass x acceleration (N)
White metal and bronze
Ultimate stress/working stress

16. Ability to withstand deformation above elastic limit under compression without failure
M x g x h (kg x 9.81 m/s/s x height (m))
Chlorides
Malleability
4.4 m/s

17. Pythagoras' Theorem
hardness
A
White metal and bronze
26.81 m/s

18. Dangerous because a crack starts slowly and propagate slowly - exceed breaking strength and the metal fails suddenly - stress must be tensile can be produced by an external load or residual stress - condensed moisture and change in temperature
polygon
Cast iron
Scalene triangle
Stress corrosion cracking

19. P & IDs
Ideal mechanical advantage
White metal and bronze
Mechanical flow diagrams
Pm x A x L x N

20. Right angle
Heating and cooling white cast iron at a controlled rate
latent heat of evaporation (vaporation)
One angle is exactly 90 degrees
Unified National

21. Negative terminal of the rectifier must always be connected to the structure that is being protected
Cathodic protection system
The specific heat of the material
effective pressure
Less than 90 degrees

22. The classes of fastening devices are...
Permanent and removable
That is supported at two ends
Specific heat
A twisting or turning effect

23. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
Stress corrosion cracking
White
Heating and cooling white cast iron at a controlled rate
Details of P & IDs

24. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
A. sine of 90
Transformed to different forms
Divide the maximum load by the original cross - sectional area
0.89

25. Change in tempereature where no heat in transferred - PV(supercript v) = C
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
The equilibrant
Sensible heat
Adiabatic

26. A 1 N weight has a kinetic energy of 1 J when its speed is...
45 kN
The specific heat of the material
4.4 m/s
hexagon

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
Trapezoid
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
water equivalent
0.0723

28. 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 solution
Total heat required for change of state
Calorimetry

29. The temperature of saturated steam vapor at 980 kPa is...
Permanent and removable
Ammonia
Opposite side / hypotenuse
179.02

30. Potential energy (Ep)
Falling temperature
M x g x h (kg x 9.81 m/s/s x height (m))
Hooke's Law
effective pressure

31. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Permanent and removable
179.02
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Be the same at any point in the process

32. Reflex angle
1 cm
Greater than 180 degrees
Opposite side / hypotenuse
Exactly 180 degrees

33. A quadrilateral with two parallel sides
A twisting or turning effect
Less than 90 degrees
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Trapezoid

34. Protons have a mass number of...
polytropic
Continuity flow
1 cm
One

35. The precise measurement of heat flow out of a system for chemical and physical processes
26.81 m/s
Calorimetry
A
0.89

36. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
distance
M x g x h (kg x 9.81 m/s/s x height (m))
Stress corrosion cracking
dryness fraction

37. 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
benefits of chromium
0.0002
Details of P & IDs
brinell hardness test

38. A quadrilateral with no parallel sides
Chord
Specific heat
Trapezium
ellipse

39. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
Chord
Pm x A x L
hexagon
10.8 m N of W

40. One is the trigonometric value of...
Pm x A x L
Purpose of material balance
A. sine of 90
Dividing the ultimate strength by the factor of safety

41. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
White metal and bronze
Specific heat
Gamma - coefficient of superficial = 2x coefficient of linear expansion
benefits of chromium

42. The most common material used in making large industrial diesel engine pistons is...
Cast iron
As a ratio
Purpose of material balance
benefits of chromium

43. A parallelogram with four equal sides
Rhombus
The equilibrant
57.48 mm
Tangent

44. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Isothermal
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Mensuration

45. Factor of safety
Ultimate stress/working stress
Specific heat
Output power(W)/input power(W)
To calculate power from an engine

46. 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...
Greater than 180 degrees
10.8 m N of W
179.02
4.4 m/s

47. Straight angle
Exactly 180 degrees
Complementary angles
Purpose of material balance
Increase

48. Sine Rule
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Scalene triangle
benefits of nickel
A / SinA = b / SinB = c / SinC

49. A pinch of salt is added to a glass of water. The result is...
10.8 m N of W
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Problem solving order
A solution

50. The most common thread used in North America on fasteners such as bolts - is the...
View of a cutting plane
Rhombus
Unified National
520.72 kJ/kg