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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. Kinetic energy (Ek)
179.02
Charles Law
1/2mv2 (kg x velocity(m/s))
Specific heat
2. As the cosine decreases - the...
One
water equivalent
linear motion relationships
Value of the angle increases
3. Compounds classified as salts may have the following characteristics
Trapezium
Areas of sectors (bounded by 2 radii and arc between them)
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
A Greek letter alpha linear
4. Pythagoras' Theorem
Increase
A
Boyle's law
Divide the maximum load by the original cross - sectional area
5. Cosine rule
Isothermal
A
polytropic
161
6. 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
Coefficient of friction
The elastic limit of the material is not exceeded
Divide the maximum load by the original cross - sectional area
benefits of copper
7. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
polytropic
Specific heat
Charles Law
Gamma - coefficient of superficial = 2x coefficient of linear expansion
8. Acute angle
benefits of chromium - nickel and copper in alloy steels
Trapezium
Pm x A x L x N
Less than 90 degrees
9. Means that the sum of the matter leaving the plant equals the sum of the matter entering
benefits of chromium - nickel and copper in alloy steels
Material balance
Trapezium
Latent heat of evaporation
10. When classifying beams - the term simple beam refers to a beam
Unified National
That is supported at two ends
To calculate power from an engine
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
11. 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
10.8 m N of W
basic oxygen process
Stress corrosion cracking
Specific heat
12. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20
A
Power
0.0723
26.81 m/s
13. Sine Rule
0.0002
A / SinA = b / SinB = c / SinC
Relative density
Process flow drawing
14. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
General gas law
Mensuration
Total heat required for change of state
110.6 kPa
15. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Unified National
110.6 kPa
Total heat required for change of state
Ultimate stress/working stress
16. PV=nRT - Boyle's law and Charle's law combined
hexagon
Stroke
Mass
General gas law
17. The most common material used in making large industrial diesel engine pistons is...
Cast iron
Exactly 180 degrees
Details of P & IDs
A twisting or turning effect
18. Resistance to wear - abrasion and penetration
0.0723
Details of P & IDs
Opposite side / hypotenuse
hardness
19. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Details of P & IDs
A twisting or turning effect
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Areas of sectors (bounded by 2 radii and arc between them)
20. 1. In a right angle triangle - the sine of an acute angle is equal to...
Opposite side / hypotenuse
Trapezium
Rhombus
Composite material
21. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
Falling temperature
White
Coefficient of friction
Toughness
22. A quadrilateral with no parallel sides
Continuity flow
Trapezium
Rhomboid
Material balance
23. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
10.8 m N of W
dryness fraction
161
Material balance
24. 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
displacement
Complementary angles
hardness
hexagon
25. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Relative density
effective pressure
Sulfuric acid
Sensible heat
26. A closed plane figure bounded by straight sides
Isosceles triangle
Problem solving order
polygon
benefits of nickel
27. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
A number with the necessary unit
Increase
Boyle's law
Heating and cooling white cast iron at a controlled rate
28. The factor of safety is always expressed...
70 MPa
hexagon
A Greek letter alpha linear
As a ratio
29. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Rhombus
Mechanical flow diagrams
Resultant
ellipse
30. A triangle with no two sides of equal length
Coefficient of friction
Boyle's law
Latent heat of evaporation
Scalene triangle
31. A scalar quantity is one which has only magnitude and can be fully described by...
Ammonia
Heating and cooling white cast iron at a controlled rate
A number with the necessary unit
Calorimetry
32. Right angle
Trapezium
One angle is exactly 90 degrees
Relative density
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
33. A straight line that joins 2 points or circumference
Details of P & IDs
Chord
Output power(W)/input power(W)
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
34. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
hexagon
Mechanical flow diagrams
70 MPa
Chord
35. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
latent heat of evaporation (vaporation)
Heat engines
A number with the necessary unit
Purpose of material balance
36. Work per second
Latent heat of evaporation
Pm x A x L x N
Chlorides
Mechanical flow diagrams
37. 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
A / SinA = b / SinB = c / SinC
Conditions required to produce sulphide corrosion cracking
Boyle's law
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
38. A 10 m long steel pipe when heated to increase its temperature by 85
0.0002
1 cm
0.0723
benefits of copper
39. The moment of a force about a point is...
Value of the angle increases
Charles Law
Falling temperature
A twisting or turning effect
40. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
effective pressure
velocity
10.8 m N of W
Isothermal
41. The force that is equal in magnitude but opposite in direction to the resultant force is called
The equilibrant
Complementary angles
Permanent and removable
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
42. 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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43. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Transformed to different forms
polygon
Stray current corrosion
More than 90 degrees
44. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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45. Expansion of a gas is said to be adiabatic when expansion takes place at...
Falling temperature
dryness fraction
hardness
The elastic limit of the material is not exceeded
46. Straight angle
Exactly 180 degrees
distance
Naperian (Natural) logarithms
Sulfuric acid
47. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
520.72 kJ/kg
Pm x A x L x N
Details of P & IDs
Unified National
48. Mechanical efficiency
A number with the necessary unit
Charles Law
Output power(W)/input power(W)
Mensuration
49. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
8908 kJ
Specific heat
2.3026
Pm x A x L x N
50. The classes of fastening devices are...
dryness fraction
0.0002
Trapezoid
Permanent and removable