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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. A parallelogram with four equal sides
Conditions required to produce sulphide corrosion cracking
26.81 m/s
White metal and bronze
Rhombus
2. The temperature of saturated steam vapor at 980 kPa is...
179.02
basic oxygen process
Value of the angle increases
Mass
3. 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?
Celsius
57.48 mm
Scalene triangle
45 kN
4. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
A. sine of 90
Isosceles triangle
Naperian (Natural) logarithms
Stroke
5. PFDs
Process flow drawing
Heating and cooling white cast iron at a controlled rate
The equilibrant
A twisting or turning effect
6. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Chlorides
Dividing the ultimate strength by the factor of safety
Specific heat
Chord
7. The classes of fastening devices are...
Stress corrosion cracking
benefits of chromium
Permanent and removable
Dividing the ultimate strength by the factor of safety
8. 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
benefits of chromium
elasticity
Less than 90 degrees
Charles Law
9. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Purpose of material balance
Trapezium
ellipse
Transformed to different forms
10. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
polytropic
Process flow drawing
Mass
11. 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
Purpose of material balance
Chlorides
0.89
12. Ratio of the opposite to the adjacent side of a right- angled triangle
Tangent
Sulfuric acid
A. sine of 90
2.3026
13. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -
Adiabatic
57.48 mm
Exactly 180 degrees
benefits of nickel
14. 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
General gas law
White metal and bronze
Permanent and removable
15. Copper fails due to...
Scalene triangle
Ammonia
179.02
1/2mv2 (kg x velocity(m/s))
16. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Hooke's Law
Sulfuric acid
benefits of chromium - nickel and copper in alloy steels
velocity
17. 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
Sulfuric acid
Relative density
0.0723
Charles Law
18. Kinetic energy (Ek)
2.3026
Greater than 180 degrees
1/2mv2 (kg x velocity(m/s))
Charles Law
19. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Tangent
Naperian (Natural) logarithms
To calculate power from an engine
Heat engines
20. Energy can be...
Specific heat
Transformed to different forms
Continuity flow
4.4 m/s
21. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
latent heat of evaporation (vaporation)
M x g x h (kg x 9.81 m/s/s x height (m))
8908 kJ
Purpose of P & IDs
22. Force - work done - power - mechanical efficiency
Problem solving order
Greater than 180 degrees
Conditions required to produce sulphide corrosion cracking
Pm x A x L x N
23. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Increase
Trapezium
Coefficient of friction
A twisting or turning effect
24. coefficient of expansion
Resultant
Scalene triangle
26.81 m/s
A Greek letter alpha linear
25. coefficient of volumetric expansion
26. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Details of P & IDs
Isothermal
0.89
Output power(W)/input power(W)
27. A closed plane figure bounded by straight sides
Adiabatic
Power
polygon
Pm x A x L x N
28. Area of a segment
Details of P & IDs
A = 4/3h2 [(square root)d/h-0.608]
Process flow drawing
Continuity flow
29. The ability to return to its original shape after an external force has been removed
Pm x A x L x N
Cast iron
elasticity
polytropic
30. In the equation 0.004 + D = 0.0042 - the value of D is...
Scalene triangle
0.0002
Calorimetry
A. sine of 90
31. Mechanical efficiency
Output power(W)/input power(W)
polytropic
View of a cutting plane
Stroke
32. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
benefits of chromium - nickel and copper in alloy steels
57.48 mm
Greater than 180 degrees
Isosceles triangle
33. Cosine rule
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
To calculate power from an engine
A
Calorimetry
34. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
Rhomboid
70 MPa
To calculate power from an engine
Ammonia
35. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
Greater than 180 degrees
Naperian (Natural) logarithms
hexagon
Hooke's Law
36. The term _____ is used as a measure of the quantity of matter.
Stray current corrosion
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Mass
Pm x A x L
37. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Ultimate stress/working stress
Resultant
Complementary angles
distance
38. Protons have a mass number of...
Heat engines
One
Stroke
Resultant
39. coefficient of superficial (area) expansion
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Scalene triangle
520.72 kJ/kg
As a ratio
40. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Total heat required for change of state
Conditions required to produce sulphide corrosion cracking
110.6 kPa
Output power(W)/input power(W)
41. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Power
Toughness
To calculate power from an engine
0.0723
42. Velocity ratio is...
Ideal mechanical advantage
0.0002
Coefficient of friction
Greater than 180 degrees
43. Orthographic projection means...
10.8 m N of W
Complementary angles
Ideal mechanical advantage
View of a cutting plane
44. Stainless fails due to...
Isosceles triangle
Stress corrosion cracking
Chlorides
Sensible heat
45. A 10 m long steel pipe when heated to increase its temperature by 85
1 cm
hexagon
Cast iron
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
46. 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
latent heat of evaporation (vaporation)
Stress corrosion cracking
70 MPa
0.89
47. Change in tempereature where no heat in transferred - PV(supercript v) = C
Value of the angle increases
Mass x acceleration (N)
Adiabatic
General gas law
48. A 1 N weight has a kinetic energy of 1 J when its speed is...
A Greek letter alpha linear
Specific heat
4.4 m/s
0.89
49. Ability to withstand deformation above elastic limit under compression without failure
Power
Malleability
Ultimate stress/working stress
displacement
50. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain