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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. Steam turbine bearings are usually made of...
White metal and bronze
One
hexagon
Process flow drawing
2. Of a process or change taking place at constant temperature - PV = C
Divide the maximum load by the original cross - sectional area
Isothermal
Coefficient of friction
1 cm
3. A triangle with two equal sides
One
Isosceles triangle
Purpose of P & IDs
hardness
4. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
velocity
Hooke's Law
displacement
Purpose of P & IDs
5. coefficient of volumetric expansion
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6. The most common scale in use is the...
Continuity flow
Celsius
A = 4/3h2 [(square root)d/h-0.608]
View of a cutting plane
7. 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
A. sine of 90
Hooke's Law
179.02
ellipse
8. The ability to return to its original shape after an external force has been removed
elasticity
45 kN
Mass x acceleration (N)
Greater than 180 degrees
9. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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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
0.89
Material balance
Relative density
Ideal mechanical advantage
11. 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
Rhomboid
A twisting or turning effect
70 MPa
Continuity flow
12. As the cosine decreases - the...
Chlorides
A
White metal and bronze
Value of the angle increases
13. The factor of safety is always expressed...
Less than 90 degrees
Mass
1 cm
As a ratio
14. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Opposite side / hypotenuse
Sensible heat
Power
A twisting or turning effect
15. A parallelogram with four equal sides
That is supported at two ends
Rhombus
One angle is exactly 90 degrees
1/2mv2 (kg x velocity(m/s))
16. 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
Calorimetry
Total heat required for change of state
Sensible heat
Stress corrosion cracking
17. H2SO4 is the chemical formula for...
45 kN
ellipse
Mensuration
Sulfuric acid
18. 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
Opposite side / hypotenuse
Total heat required for change of state
Resultant
Conditions required to produce sulphide corrosion cracking
19. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Process flow drawing
Unified National
Specific heat
Mass x acceleration (N)
20. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Be the same at any point in the process
hexagon
Hooke's Law
Increase
21. Right angle
2.3026
Octagon
ellipse
One angle is exactly 90 degrees
22. coefficient of superficial (area) expansion
A. sine of 90
110.6 kPa
Transformed to different forms
Gamma - coefficient of superficial = 2x coefficient of linear expansion
23. 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
Problem solving order
0.0002
Purpose of material balance
displacement
24. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Material balance
Naperian (Natural) logarithms
0.0002
Power
25. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Ultimate stress/working stress
benefits of chromium - nickel and copper in alloy steels
latent heat of evaporation (vaporation)
A
26. PFDs
0.0723
Power
Process flow drawing
Rhomboid
27. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Work
Pm x A x L x N
Areas of sectors (bounded by 2 radii and arc between them)
A solution
28. Being made of 2 or more substances creating unique characteristics and properties when combine
Composite material
Opposite side / hypotenuse
Specific heat
Divide the maximum load by the original cross - sectional area
29. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
benefits of copper
Work
General gas law
The elastic limit of the material is not exceeded
30. Ability to withstand deformation above elastic limit under compression without failure
As a ratio
View of a cutting plane
Malleability
Ultimate stress/working stress
31. A gas occupies 8.62 m3 at 1800 kPa and 26
2.3026
hardness
Toughness
161
32. A parallelogram with adjacent sides of unequal lengths
Purpose of material balance
Rhomboid
Greater than 180 degrees
M x g x h (kg x 9.81 m/s/s x height (m))
33. Sine Rule
Heating and cooling white cast iron at a controlled rate
benefits of copper
A / SinA = b / SinB = c / SinC
Mass x acceleration (N)
34. The rate at which heat flow through a slab of a material does not depend on...
Work
One
The specific heat of the material
The elastic limit of the material is not exceeded
35. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Cathodic protection system
Dividing the ultimate strength by the factor of safety
Less than 90 degrees
0.89
36. Work per second
Isothermal
Pm x A x L x N
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Resultant
37. Straight angle
One angle is exactly 90 degrees
Chlorides
View of a cutting plane
Exactly 180 degrees
38. 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...
Rhombus
Latent heat of evaporation
Cathodic protection system
Continuity flow
39. Expansion of a gas is said to be adiabatic when expansion takes place at...
2.3026
Falling temperature
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Mass
40. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
White metal and bronze
distance
Isothermal
Work
41. Velocity ratio is...
elasticity
brinell hardness test
The specific heat of the material
Ideal mechanical advantage
42. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
0.0723
To calculate power from an engine
polytropic
Stray current corrosion
43. Means that the sum of the matter leaving the plant equals the sum of the matter entering
A Greek letter alpha linear
Material balance
Complementary angles
Purpose of material balance
44. The most common material used in making large industrial diesel engine pistons is...
Cast iron
Cathodic protection system
Isothermal
hexagon
45. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
View of a cutting plane
Areas of sectors (bounded by 2 radii and arc between them)
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Sensible heat
46. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Heat engines
That is supported at two ends
Heating and cooling white cast iron at a controlled rate
Total heat required for change of state
47. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Ideal mechanical advantage
70 MPa
Relative density
Work
48. Compounds classified as salts may have the following characteristics
Rhomboid
Stress corrosion cracking
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Resultant
49. Whether a material will break under sudden impact or hard blow
Toughness
Areas of sectors (bounded by 2 radii and arc between them)
elasticity
Cast iron
50. Malleable cast iron is produced by...
Transformed to different forms
Heating and cooling white cast iron at a controlled rate
benefits of chromium - nickel and copper in alloy steels
Under deposit corrosion - enhanced oxygen generation - contact of live organisms