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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. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
distance
One
White
Trapezoid
2. PVn(super script n) = C
polytropic
Power
Malleability
Problem solving order
3. A gas occupies 8.62 m3 at 1800 kPa and 26
Process flow drawing
Stress corrosion cracking
161
Value of the angle increases
4. When calculating the ultimate stress of a material - we should
Mechanical flow diagrams
520.72 kJ/kg
A solution
Divide the maximum load by the original cross - sectional area
5. Acute angle
161
benefits of nickel
Scalene triangle
Less than 90 degrees
6. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Adiabatic
latent heat of evaporation (vaporation)
polytropic
45 kN
7. 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
hardness
Charles Law
hexagon
Latent heat of evaporation
8. Safe working stress is determined by...
basic oxygen process
4.4 m/s
Composite material
Dividing the ultimate strength by the factor of safety
9. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Details of P & IDs
Hooke's Law
Pm x A x L x N
520.72 kJ/kg
10. A quadrilateral with no parallel sides
Complementary angles
The specific heat of the material
Trapezium
benefits of copper
11. Cosine rule
Value of the angle increases
Power
Cathodic protection system
A
12. coefficient of volumetric expansion
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13. Right angle
One angle is exactly 90 degrees
8908 kJ
polytropic
Isosceles triangle
14. The precise measurement of heat flow out of a system for chemical and physical processes
Calorimetry
The elastic limit of the material is not exceeded
110.6 kPa
Adiabatic
15. The term _____ is used as a measure of the quantity of matter.
Unified National
Mass
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
water equivalent
16. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
velocity
Stray current corrosion
Stress corrosion cracking
Increase
17. Steam turbine bearings are usually made of...
Exactly 180 degrees
White metal and bronze
polytropic
Power
18. A straight line that joins 2 points or circumference
Sensible heat
Rhomboid
Chord
26.81 m/s
19. Velocity ratio is...
A Greek letter alpha linear
Hooke's Law
Ideal mechanical advantage
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
20. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
benefits of chromium - nickel and copper in alloy steels
That is supported at two ends
Permanent and removable
benefits of copper
21. Any two angles whose sum is 90
Trapezoid
Complementary angles
brinell hardness test
Chlorides
22. 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
Conditions required to produce sulphide corrosion cracking
Continuity flow
Calorimetry
Purpose of material balance
23. A 1 N weight has a kinetic energy of 1 J when its speed is...
4.4 m/s
520.72 kJ/kg
110.6 kPa
Be the same at any point in the process
24. Work per power stroke (J)
View of a cutting plane
Pm x A x L
The specific heat of the material
Hooke's Law
25. When classifying beams - the term simple beam refers to a beam
Power
Sensible heat
ellipse
That is supported at two ends
26. Orthographic projection means...
water equivalent
Greater than 180 degrees
Output power(W)/input power(W)
View of a cutting plane
27. Change in tempereature where no heat in transferred - PV(supercript v) = C
Conditions required to produce sulphide corrosion cracking
26.81 m/s
benefits of nickel
Adiabatic
28. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
velocity
Increase
520.72 kJ/kg
Ideal mechanical advantage
29. 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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30. The ability to return to its original shape after an external force has been removed
520.72 kJ/kg
Transformed to different forms
Scalene triangle
elasticity
31. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
The equilibrant
8908 kJ
Stroke
Specific heat
32. Factor of safety
Conditions required to produce sulphide corrosion cracking
Ultimate stress/working stress
Process flow drawing
Composite material
33. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Relative density
velocity
Heat engines
179.02
34. Potential energy (Ep)
Stress corrosion cracking
Sensible heat
M x g x h (kg x 9.81 m/s/s x height (m))
White
35. Force - work done - power - mechanical efficiency
Opposite side / hypotenuse
Mass
Problem solving order
benefits of chromium
36. 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?
10.8 m N of W
45 kN
A / SinA = b / SinB = c / SinC
brinell hardness test
37. Mechanical efficiency
Calorimetry
Output power(W)/input power(W)
Charles Law
Boyle's law
38. 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...
A = 4/3h2 [(square root)d/h-0.608]
linear motion relationships
10.8 m N of W
1/2mv2 (kg x velocity(m/s))
39. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
basic oxygen process
Continuity flow
hardness
Mass
40. 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
White metal and bronze
Purpose of P & IDs
Naperian (Natural) logarithms
1 cm
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)
Be the same at any point in the process
linear motion relationships
179.02
Rhombus
42. In the equation 0.004 + D = 0.0042 - the value of D is...
hexagon
Falling temperature
0.0002
Complementary angles
43. 1. In a right angle triangle - the sine of an acute angle is equal to...
Opposite side / hypotenuse
View of a cutting plane
Greater than 180 degrees
Increase
44. coefficient of superficial (area) expansion
Gamma - coefficient of superficial = 2x coefficient of linear expansion
M x g x h (kg x 9.81 m/s/s x height (m))
Mensuration
To calculate power from an engine
45. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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46. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Isosceles triangle
elasticity
Output power(W)/input power(W)
Specific heat
47. Copper fails due to...
Latent heat of evaporation
Ammonia
hardness
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
48. PV=nRT - Boyle's law and Charle's law combined
Problem solving order
A. sine of 90
General gas law
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
49. Micro organisms promote corrosion...
Ultimate stress/working stress
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
A = 4/3h2 [(square root)d/h-0.608]
A twisting or turning effect
50. 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...
Octagon
57.48 mm
1 cm
Latent heat of evaporation