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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. 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
Work
displacement
Permanent and removable
Trapezoid

2. Work per second
1 cm
Pm x A x L x N
A Greek letter alpha linear
Rhomboid

3. Force - work done - power - mechanical efficiency
Calorimetry
Heating and cooling white cast iron at a controlled rate
Chlorides
Problem solving order

4. Change in tempereature where no heat in transferred - PV(supercript v) = C
Adiabatic
brinell hardness test
Chord
hexagon

5. The factor of safety is always expressed...
As a ratio
Isothermal
Heating and cooling white cast iron at a controlled rate
Toughness

6. The most common material used in making large industrial diesel engine pistons is...
A solution
benefits of copper
Sensible heat
Cast iron

7. 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
That is supported at two ends
Greater than 180 degrees
Continuity flow
Scalene triangle

8. 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)
General gas law
Heating and cooling white cast iron at a controlled rate
linear motion relationships
Work

9. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d
Purpose of P & IDs
179.02
General gas law
ellipse

10. PV=nRT - Boyle's law and Charle's law combined
polygon
General gas law
hexagon
Relative density

11. A triangle with two equal sides
Isosceles triangle
Trapezium
benefits of copper
Trapezoid

12. PVn(super script n) = C
brinell hardness test
polytropic
benefits of chromium - nickel and copper in alloy steels
basic oxygen process

13. Whether a material will break under sudden impact or hard blow
161
Hooke's Law
Toughness
effective pressure

14. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Purpose of material balance
The elastic limit of the material is not exceeded
2.3026
4.4 m/s

15. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Naperian (Natural) logarithms
0.89
A Greek letter alpha linear
Problem solving order

16. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
0.0723
Continuity flow
Scalene triangle
8908 kJ

17. Acute angle
brinell hardness test
0.89
Less than 90 degrees
Heating and cooling white cast iron at a controlled rate

18. A parallelogram with four equal sides
Ammonia
Rhombus
Conditions required to produce sulphide corrosion cracking
velocity

19. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Material balance
Mechanical flow diagrams
Relative density
Rhombus

20. Expansion of a gas is said to be adiabatic when expansion takes place at...
Naperian (Natural) logarithms
water equivalent
Falling temperature
Purpose of P & IDs

21. Factor of safety
View of a cutting plane
Toughness
Pm x A x L x N
Ultimate stress/working stress

22. In the equation 0.004 + D = 0.0042 - the value of D is...
Toughness
0.0002
520.72 kJ/kg
View of a cutting plane

23. Is the required to change a unit mass from a gas to liquid or liquid to a gas
latent heat of evaporation (vaporation)
Work
benefits of copper
Latent heat of evaporation

24. The temperature of saturated steam vapor at 980 kPa is...
179.02
That is supported at two ends
Mechanical flow diagrams
Complementary angles

25. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Opposite side / hypotenuse
benefits of chromium - nickel and copper in alloy steels
57.48 mm
Be the same at any point in the process

26. As the cosine decreases - the...
Exactly 180 degrees
Complementary angles
The specific heat of the material
Value of the angle increases

27. The ability to return to its original shape after an external force has been removed
elasticity
179.02
Unified National
Mensuration

28. Velocity ratio is...
benefits of chromium - nickel and copper in alloy steels
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
A Greek letter alpha linear
Ideal mechanical advantage

29. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
Dividing the ultimate strength by the factor of safety
Chord
Process flow drawing

30. One is the trigonometric value of...
Increase
One angle is exactly 90 degrees
A. sine of 90
8908 kJ

31. Kinetic energy (Ek)
Ideal mechanical advantage
179.02
1/2mv2 (kg x velocity(m/s))
Resultant

32. Copper fails due to...
Toughness
Ammonia
Ideal mechanical advantage
A

33. Stainless fails due to...
Areas of sectors (bounded by 2 radii and arc between them)
Less than 90 degrees
Chlorides
Relative density

34. A quadrilateral with two parallel sides
Trapezoid
benefits of nickel
One
Chlorides

35. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
effective pressure
benefits of nickel
Specific heat
Transformed to different forms

36. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
M x g x h (kg x 9.81 m/s/s x height (m))
benefits of copper
To calculate power from an engine
One

37. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Rhomboid
45 kN
Specific heat
Material balance

38. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Transformed to different forms
Sulfuric acid
Malleability
0.89

39. A scalar quantity is one which has only magnitude and can be fully described by...
70 MPa
A = 4/3h2 [(square root)d/h-0.608]
A number with the necessary unit
Specific heat

40. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
benefits of copper
A = 4/3h2 [(square root)d/h-0.608]
Ideal mechanical advantage
Mechanical flow diagrams

41. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
General gas law
polygon
Specific heat
linear motion relationships

42. Straight angle
Tangent
Cathodic protection system
0.0723
Exactly 180 degrees

43. A gas occupies 8.62 m3 at 1800 kPa and 26
More than 90 degrees
2.3026
As a ratio
161

44. 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
Cast iron
Stress corrosion cracking
Stray current corrosion
Composite material

45. Obtuse angle
Mass
More than 90 degrees
179.02
Scalene triangle

46. 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?
One
Mass
45 kN
distance

47. A 10 m long steel pipe when heated to increase its temperature by 85
benefits of chromium - nickel and copper in alloy steels
Heat engines
1 cm
Isosceles triangle

48. The moment of a force about a point is...
A twisting or turning effect
8908 kJ
10.8 m N of W
ellipse

49. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Heating and cooling white cast iron at a controlled rate
Purpose of material balance
Process flow drawing
Pm x A x L x N

50. 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
A solution
Exactly 180 degrees