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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. Reflex angle
Greater than 180 degrees
Areas of sectors (bounded by 2 radii and arc between them)
Conditions required to produce sulphide corrosion cracking
polytropic
2. The classes of fastening devices are...
benefits of chromium
hexagon
Greater than 180 degrees
Permanent and removable
3. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
water equivalent
Boyle's law
Heat engines
Adiabatic
4. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Specific heat
linear motion relationships
Composite material
57.48 mm
5. The term _____ is used as a measure of the quantity of matter.
The elastic limit of the material is not exceeded
520.72 kJ/kg
Mass
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
6. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Stray current corrosion
A solution
A
Increase
7. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Material balance
Purpose of material balance
Adiabatic
A. sine of 90
8. 1. In a right angle triangle - the sine of an acute angle is equal to...
Less than 90 degrees
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Opposite side / hypotenuse
One angle is exactly 90 degrees
9. PFDs
Mass x acceleration (N)
A = 4/3h2 [(square root)d/h-0.608]
Process flow drawing
Unified National
10. The precise measurement of heat flow out of a system for chemical and physical processes
1/2mv2 (kg x velocity(m/s))
Rhombus
A / SinA = b / SinB = c / SinC
Calorimetry
11. A parallelogram with four equal sides
One
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Rhombus
0.0723
12. Is the required to change a unit mass from a gas to liquid or liquid to a gas
latent heat of evaporation (vaporation)
More than 90 degrees
Complementary angles
Heating and cooling white cast iron at a controlled rate
13. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
More than 90 degrees
70 MPa
110.6 kPa
8908 kJ
14. A quadrilateral with no parallel sides
70 MPa
A Greek letter alpha linear
Trapezium
2.3026
15. 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
Complementary angles
Relative density
Stray current corrosion
70 MPa
16. Right angle
0.0723
ellipse
One angle is exactly 90 degrees
Hooke's Law
17. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
1/2mv2 (kg x velocity(m/s))
2.3026
Stray current corrosion
benefits of chromium
18. 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...
1 cm
Latent heat of evaporation
Cast iron
Conditions required to produce sulphide corrosion cracking
19. 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
Specific heat
70 MPa
dryness fraction
benefits of chromium
20. The ability to return to its original shape after an external force has been removed
polygon
Chlorides
elasticity
Less than 90 degrees
21. Compounds classified as salts may have the following characteristics
brinell hardness test
Chord
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
22. Force
Complementary angles
Falling temperature
Celsius
Mass x acceleration (N)
23. Potential energy (Ep)
Mass
Continuity flow
0.0002
M x g x h (kg x 9.81 m/s/s x height (m))
24. Acute angle
179.02
Less than 90 degrees
Naperian (Natural) logarithms
Specific heat
25. 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
Latent heat of evaporation
0.89
ellipse
Transformed to different forms
26. PV=nRT - Boyle's law and Charle's law combined
hardness
Cathodic protection system
General gas law
Conditions required to produce sulphide corrosion cracking
27. Cosine rule
water equivalent
Permanent and removable
Problem solving order
A
28. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Mass
Transformed to different forms
Resultant
More than 90 degrees
29. A parallelogram with adjacent sides of unequal lengths
Mass x acceleration (N)
Malleability
Ideal mechanical advantage
Rhomboid
30. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Mechanical flow diagrams
8908 kJ
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Naperian (Natural) logarithms
31. Pythagoras' Theorem
Work
Scalene triangle
A
Ideal mechanical advantage
32. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Work
0.0002
A Greek letter alpha linear
Naperian (Natural) logarithms
33. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
0.0002
The elastic limit of the material is not exceeded
Total heat required for change of state
Calorimetry
34. 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
Celsius
Conditions required to produce sulphide corrosion cracking
Greater than 180 degrees
M x g x h (kg x 9.81 m/s/s x height (m))
35. Kinetic energy (Ek)
Chlorides
Gamma - coefficient of superficial = 2x coefficient of linear expansion
1/2mv2 (kg x velocity(m/s))
Complementary angles
36. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Coefficient of friction
Less than 90 degrees
26.81 m/s
Tangent
37. 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)
1 cm
Specific heat
A. sine of 90
linear motion relationships
38. Ratio of the opposite to the adjacent side of a right- angled triangle
To calculate power from an engine
Problem solving order
Tangent
latent heat of evaporation (vaporation)
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
Purpose of P & IDs
Process flow drawing
Chord
Material balance
40. P & IDs
Complementary angles
57.48 mm
Greater than 180 degrees
Mechanical flow diagrams
41. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
The equilibrant
Ammonia
Pm x A x L
8908 kJ
42. The act or process of measuring
Mensuration
Exactly 180 degrees
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
70 MPa
43. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain
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44. Energy can be...
Transformed to different forms
Trapezium
Permanent and removable
One
45. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Falling temperature
110.6 kPa
The elastic limit of the material is not exceeded
Heating and cooling white cast iron at a controlled rate
46. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Be the same at any point in the process
polytropic
effective pressure
One
47. Whether a material will break under sudden impact or hard blow
Toughness
Output power(W)/input power(W)
Areas of sectors (bounded by 2 radii and arc between them)
water equivalent
48. Expansion of a gas is said to be adiabatic when expansion takes place at...
Ideal mechanical advantage
Heating and cooling white cast iron at a controlled rate
Falling temperature
110.6 kPa
49. PVn(super script n) = C
Tangent
Calorimetry
polytropic
Work
50. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
A = 4/3h2 [(square root)d/h-0.608]
Continuity flow
70 MPa