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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. coefficient of superficial (area) expansion
Malleability
Gamma - coefficient of superficial = 2x coefficient of linear expansion
4.4 m/s
White metal and bronze
2. Any two angles whose sum is 90
A number with the necessary unit
displacement
Complementary angles
polytropic
3. Malleable cast iron is produced by...
A / SinA = b / SinB = c / SinC
Greater than 180 degrees
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Heating and cooling white cast iron at a controlled rate
4. A triangle with no two sides of equal length
Scalene triangle
A solution
Dividing the ultimate strength by the factor of safety
Complementary angles
5. The factor of safety is always expressed...
A
Output power(W)/input power(W)
Specific heat
As a ratio
6. PVn(super script n) = C
1 cm
polytropic
Stroke
A. sine of 90
7. 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
Stress corrosion cracking
0.0002
Stroke
8. Force
Mass x acceleration (N)
water equivalent
Chord
velocity
9. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
Purpose of material balance
Naperian (Natural) logarithms
benefits of copper
2.3026
10. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Cast iron
Exactly 180 degrees
water equivalent
More than 90 degrees
11. Acute angle
Latent heat of evaporation
A number with the necessary unit
Isosceles triangle
Less than 90 degrees
12. Pythagoras' Theorem
distance
A
Heating and cooling white cast iron at a controlled rate
water equivalent
13. 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
Pm x A x L x N
Purpose of P & IDs
Toughness
Ammonia
14. Work per second
Specific heat
Sulfuric acid
Pm x A x L x N
latent heat of evaporation (vaporation)
15. 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)
Stress corrosion cracking
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Resultant
linear motion relationships
16. The most common material used in making large industrial diesel engine pistons is...
Sulfuric acid
dryness fraction
Work
Cast iron
17. A scalar quantity is one which has only magnitude and can be fully described by...
Isosceles triangle
A number with the necessary unit
White metal and bronze
Problem solving order
18. Kinetic energy (Ek)
latent heat of evaporation (vaporation)
Composite material
1/2mv2 (kg x velocity(m/s))
4.4 m/s
19. Being made of 2 or more substances creating unique characteristics and properties when combine
0.89
Composite material
hardness
Details of P & IDs
20. A 10 m long steel pipe when heated to increase its temperature by 85
A twisting or turning effect
displacement
1 cm
Permanent and removable
21. Whether a material will break under sudden impact or hard blow
45 kN
Toughness
Less than 90 degrees
A
22. 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
polygon
Coefficient of friction
A Greek letter alpha linear
The equilibrant
23. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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183
24. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
8908 kJ
That is supported at two ends
Scalene triangle
Gamma - coefficient of superficial = 2x coefficient of linear expansion
25. The classes of fastening devices are...
110.6 kPa
45 kN
Trapezium
Permanent and removable
26. Resistance to wear - abrasion and penetration
Falling temperature
Cathodic protection system
hardness
General gas law
27. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
Permanent and removable
Pm x A x L x N
Sensible heat
To calculate power from an engine
28. Protons have a mass number of...
Celsius
One
Areas of sectors (bounded by 2 radii and arc between them)
To calculate power from an engine
29. 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?
M x g x h (kg x 9.81 m/s/s x height (m))
Conditions required to produce sulphide corrosion cracking
45 kN
Continuity flow
30. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
2.3026
Specific heat
Output power(W)/input power(W)
70 MPa
31. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Greater than 180 degrees
110.6 kPa
0.89
Total heat required for change of state
32. The term _____ is used as a measure of the quantity of matter.
A. sine of 90
Mass
8908 kJ
Latent heat of evaporation
33. 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
Continuity flow
The specific heat of the material
Dividing the ultimate strength by the factor of safety
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
34. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Boyle's law
velocity
Rhomboid
10.8 m N of W
35. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Ammonia
Exactly 180 degrees
Specific heat
ellipse
36. Potential energy (Ep)
M x g x h (kg x 9.81 m/s/s x height (m))
161
Rhombus
Sensible heat
37. One is the trigonometric value of...
A. sine of 90
Calorimetry
8908 kJ
Ammonia
38. 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
Complementary angles
Conditions required to produce sulphide corrosion cracking
Ideal mechanical advantage
0.0002
39. A closed plane figure bounded by straight sides
polygon
basic oxygen process
Stroke
Value of the angle increases
40. P & IDs
Octagon
Mechanical flow diagrams
polytropic
Tangent
41. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Power
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Isosceles triangle
42. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Falling temperature
polytropic
dryness fraction
Purpose of material balance
43. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
dryness fraction
Material balance
Increase
Dividing the ultimate strength by the factor of safety
44. Cosine rule
Specific heat
A
Coefficient of friction
Ammonia
45. Reflex angle
A
Greater than 180 degrees
Be the same at any point in the process
Sulfuric acid
46. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Stroke
Specific heat
Charles Law
polytropic
47. The most common thread used in North America on fasteners such as bolts - is the...
A solution
Heat engines
Stress corrosion cracking
Unified National
48. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Coefficient of friction
More than 90 degrees
Material balance
water equivalent
49. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
ellipse
Chlorides
View of a cutting plane
The elastic limit of the material is not exceeded
50. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
The elastic limit of the material is not exceeded
Resultant
Material balance
basic oxygen process