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Test your basic knowledge |
Power Engineering
Start Test
Study First
Subject
:
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. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -
520.72 kJ/kg
Chlorides
benefits of nickel
benefits of chromium - nickel and copper in alloy steels
2. 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
Process flow drawing
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Be the same at any point in the process
3. PV=nRT - Boyle's law and Charle's law combined
Mechanical flow diagrams
General gas law
Relative density
Material balance
4. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
110.6 kPa
Pm x A x L
Transformed to different forms
benefits of copper
5. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Heat engines
water equivalent
Scalene triangle
benefits of copper
6. Change in tempereature where no heat in transferred - PV(supercript v) = C
Naperian (Natural) logarithms
Adiabatic
8908 kJ
Pm x A x L
7. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Resultant
Divide the maximum load by the original cross - sectional area
8908 kJ
Ultimate stress/working stress
8. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
displacement
elasticity
Calorimetry
520.72 kJ/kg
9. A gas occupies 8.62 m3 at 1800 kPa and 26
0.89
linear motion relationships
161
benefits of copper
10. 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
Trapezoid
A / SinA = b / SinB = c / SinC
Total heat required for change of state
Relative density
11. P & IDs
Hooke's Law
Mechanical flow diagrams
Mass x acceleration (N)
Details of P & IDs
12. The most common scale in use is the...
Celsius
hardness
Chord
8908 kJ
13. 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
Stress corrosion cracking
Tangent
polytropic
Adiabatic
14. The term _____ is used as a measure of the quantity of matter.
Scalene triangle
Specific heat
A / SinA = b / SinB = c / SinC
Mass
15. Acute angle
Less than 90 degrees
One
Heat engines
Specific heat
16. Obtuse angle
benefits of chromium
Process flow drawing
Pm x A x L x N
More than 90 degrees
17. Right angle
One angle is exactly 90 degrees
0.0002
Sensible heat
Isosceles triangle
18. A quadrilateral with two parallel sides
Stroke
Mass x acceleration (N)
Chord
Trapezoid
19. The most common thread used in North America on fasteners such as bolts - is the...
Hooke's Law
Specific heat
A Greek letter alpha linear
Unified National
20. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
To calculate power from an engine
Calorimetry
0.89
Be the same at any point in the process
21. A closed plane figure bounded by straight sides
A twisting or turning effect
polygon
Permanent and removable
velocity
22. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Cathodic protection system
57.48 mm
Purpose of material balance
Heating and cooling white cast iron at a controlled rate
23. Resistance to wear - abrasion and penetration
A Greek letter alpha linear
Exactly 180 degrees
Output power(W)/input power(W)
hardness
24. Work per second
Heat engines
Pm x A x L x N
Stroke
velocity
25. In the equation 0.004 + D = 0.0042 - the value of D is...
Complementary angles
0.0002
More than 90 degrees
Power
26. Force
Specific heat
2.3026
Purpose of P & IDs
Mass x acceleration (N)
27. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Octagon
The elastic limit of the material is not exceeded
Ideal mechanical advantage
polytropic
28. 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...
10.8 m N of W
polytropic
ellipse
Rhombus
29. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
Isosceles triangle
The equilibrant
Stroke
30. 1. In a right angle triangle - the sine of an acute angle is equal to...
Trapezoid
Opposite side / hypotenuse
Isothermal
Calorimetry
31. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
A / SinA = b / SinB = c / SinC
Mensuration
Latent heat of evaporation
Be the same at any point in the process
32. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
benefits of nickel
Material balance
Continuity flow
Details of P & IDs
33. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Chord
Divide the maximum load by the original cross - sectional area
effective pressure
Pm x A x L x N
34. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
161
distance
A twisting or turning effect
Stray current corrosion
35. The factor of safety is always expressed...
Details of P & IDs
Hooke's Law
Ideal mechanical advantage
As a ratio
36. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases
Charles Law
Material balance
Trapezoid
Specific heat
37. Kinetic energy (Ek)
1/2mv2 (kg x velocity(m/s))
Permanent and removable
Naperian (Natural) logarithms
Stroke
38. Velocity ratio is...
Ideal mechanical advantage
benefits of chromium - nickel and copper in alloy steels
Heating and cooling white cast iron at a controlled rate
Increase
39. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
dryness fraction
Heating and cooling white cast iron at a controlled rate
A = 4/3h2 [(square root)d/h-0.608]
White metal and bronze
40. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
A
water equivalent
Permanent and removable
displacement
41. 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)
linear motion relationships
2.3026
As a ratio
polytropic
42. The precise measurement of heat flow out of a system for chemical and physical processes
161
View of a cutting plane
0.0723
Calorimetry
43. The classes of fastening devices are...
Permanent and removable
Trapezoid
Areas of sectors (bounded by 2 radii and arc between them)
10.8 m N of W
44. Factor of safety
Ultimate stress/working stress
water equivalent
Purpose of P & IDs
Heat engines
45. Reflex angle
A
Greater than 180 degrees
General gas law
Work
46. A quadrilateral with no parallel sides
Trapezium
Purpose of P & IDs
A / SinA = b / SinB = c / SinC
Mass
47. coefficient of volumetric expansion
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183
48. 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
Specific heat
Purpose of material balance
Permanent and removable
49. Straight angle
Increase
Mechanical flow diagrams
Cast iron
Exactly 180 degrees
50. 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
Composite material
water equivalent
M x g x h (kg x 9.81 m/s/s x height (m))
Coefficient of friction
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