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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. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Latent heat of evaporation
Greater than 180 degrees
Stroke
Unified National

2. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
General gas law
Pm x A x L x N
Work
26.81 m/s

3. Straight angle
Power
Trapezium
Mensuration
Exactly 180 degrees

4. PVn(super script n) = C
polytropic
A twisting or turning effect
Problem solving order
Less than 90 degrees

5. A straight line that joins 2 points or circumference
The equilibrant
Chord
Mensuration
Octagon

6. Right angle
Adiabatic
45 kN
One angle is exactly 90 degrees
Power

7. A triangle with no two sides of equal length
Scalene triangle
8908 kJ
Greater than 180 degrees
Trapezoid

8. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
brinell hardness test
Details of P & IDs
Work
Problem solving order

9. One is the trigonometric value of...
velocity
A
Ammonia
A. sine of 90

10. A 10 m long steel pipe when heated to increase its temperature by 85
Heat engines
1 cm
benefits of copper
Hooke's Law

11. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
70 MPa
One
linear motion relationships

12. 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
One angle is exactly 90 degrees
ellipse
10.8 m N of W
Be the same at any point in the process

13. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
Malleability
Specific heat
2.3026
hardness

14. Is the required to change a unit mass from a gas to liquid or liquid to a gas
A twisting or turning effect
Stress corrosion cracking
A Greek letter alpha linear
latent heat of evaporation (vaporation)

15. P & IDs
Celsius
Mechanical flow diagrams
Stroke
45 kN

16. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Naperian (Natural) logarithms
brinell hardness test
A number with the necessary unit
Problem solving order

17. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Resultant
hardness
Toughness
0.0723

18. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
520.72 kJ/kg
Less than 90 degrees
distance
Toughness

19. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
A / SinA = b / SinB = c / SinC
Scalene triangle
Specific heat
Increase

20. The classes of fastening devices are...
distance
hardness
Hooke's Law
Permanent and removable

21. Cosine rule
A
Exactly 180 degrees
basic oxygen process
That is supported at two ends

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
Unified National
Relative density
linear motion relationships
Pm x A x L

23. Mechanical efficiency
A
Output power(W)/input power(W)
2.3026
Gamma - coefficient of superficial = 2x coefficient of linear expansion

24. Kinetic energy (Ek)
Purpose of material balance
1/2mv2 (kg x velocity(m/s))
Composite material
The elastic limit of the material is not exceeded

25. The most common material used in making large industrial diesel engine pistons is...
Ideal mechanical advantage
1/2mv2 (kg x velocity(m/s))
basic oxygen process
Cast iron

26. Orthographic projection means...
Value of the angle increases
effective pressure
110.6 kPa
View of a cutting plane

27. Expansion of a gas is said to be adiabatic when expansion takes place at...
brinell hardness test
Heating and cooling white cast iron at a controlled rate
Falling temperature
Mass x acceleration (N)

28. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
elasticity
Purpose of material balance
dryness fraction
26.81 m/s

29. As the cosine decreases - the...
Rhomboid
Sensible heat
Value of the angle increases
The specific heat of the material

30. Safe working stress is determined by...
Pm x A x L x N
Material balance
Dividing the ultimate strength by the factor of safety
Continuity flow

31. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
water equivalent
0.0002
Stress corrosion cracking

32. Resistance to wear - abrasion and penetration
4.4 m/s
hardness
Mensuration
Octagon

33. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Stress corrosion cracking
velocity
Areas of sectors (bounded by 2 radii and arc between them)
brinell hardness test

34. The factor of safety is always expressed...
Resultant
As a ratio
polytropic
Mensuration

35. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
hexagon
View of a cutting plane
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
1 cm

36. A 1 N weight has a kinetic energy of 1 J when its speed is...
Value of the angle increases
More than 90 degrees
Heat engines
4.4 m/s

37. A quadrilateral with two parallel sides
linear motion relationships
Trapezoid
Cast iron
Ultimate stress/working stress

38. Work per power stroke (J)
Latent heat of evaporation
velocity
The equilibrant
Pm x A x L

39. 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
White
Celsius
Malleability
Purpose of P & IDs

40. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Material balance
Purpose of P & IDs
70 MPa
Details of P & IDs

41. A quadrilateral with no parallel sides
White metal and bronze
Chord
Trapezium
Coefficient of friction

42. Change in tempereature where no heat in transferred - PV(supercript v) = C
Chlorides
Details of P & IDs
0.0002
Adiabatic

43. Work per second
Coefficient of friction
Greater than 180 degrees
179.02
Pm x A x L x N

44. 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...
brinell hardness test
Latent heat of evaporation
1/2mv2 (kg x velocity(m/s))
linear motion relationships

45. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
hardness
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Hooke's Law
effective pressure

46. coefficient of volumetric expansion

47. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
0.89
Cast iron
10.8 m N of W
Octagon

48. Any two angles whose sum is 90
4.4 m/s
Complementary angles
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Scalene triangle

49. A parallelogram with adjacent sides of unequal lengths
Chlorides
Rhomboid
latent heat of evaporation (vaporation)
View of a cutting plane

50. Being made of 2 or more substances creating unique characteristics and properties when combine
A = 4/3h2 [(square root)d/h-0.608]
Composite material
Heating and cooling white cast iron at a controlled rate
Boyle's law