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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. One is the trigonometric value of...
A. sine of 90
elasticity
polygon
10.8 m N of W
2. Any two angles whose sum is 90
Malleability
45 kN
Complementary angles
Rhombus
3. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
To calculate power from an engine
Heat engines
View of a cutting plane
distance
4. Of a process or change taking place at constant temperature - PV = C
Continuity flow
Rhombus
A = 4/3h2 [(square root)d/h-0.608]
Isothermal
5. Right angle
Coefficient of friction
Sulfuric acid
Permanent and removable
One angle is exactly 90 degrees
6. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Stroke
Latent heat of evaporation
A twisting or turning effect
Sensible heat
7. Work per power stroke (J)
Purpose of P & IDs
Pm x A x L
Increase
A twisting or turning effect
8. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Resultant
Purpose of P & IDs
Sensible heat
Total heat required for change of state
9. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
The specific heat of the material
Relative density
520.72 kJ/kg
water equivalent
10. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Ammonia
Stray current corrosion
Trapezoid
Purpose of material balance
11. 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
0.0723
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
effective pressure
Malleability
12. 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...
benefits of copper
Octagon
Pm x A x L
10.8 m N of W
13. Stainless fails due to...
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Chlorides
Trapezium
Areas of sectors (bounded by 2 radii and arc between them)
14. Ratio of the opposite to the adjacent side of a right- angled triangle
Be the same at any point in the process
Tangent
Purpose of material balance
Opposite side / hypotenuse
15. In the equation 0.004 + D = 0.0042 - the value of D is...
0.0002
Value of the angle increases
Tangent
displacement
16. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Composite material
26.81 m/s
Specific heat
Naperian (Natural) logarithms
17. 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?
45 kN
hexagon
Falling temperature
benefits of copper
18. Potential energy (Ep)
M x g x h (kg x 9.81 m/s/s x height (m))
The equilibrant
Value of the angle increases
A number with the necessary unit
19. A triangle with two equal sides
Continuity flow
Isosceles triangle
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
20. The most common thread used in North America on fasteners such as bolts - is the...
Unified National
A
Areas of sectors (bounded by 2 radii and arc between them)
Chlorides
21. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Mass x acceleration (N)
distance
benefits of copper
Resultant
22. All sides equal - all angles are equal and opposite sides parallel - divided into 6 ISOSCELES triangles - each angle in an octagon is 135 - A = 4.83s2
Octagon
Specific heat
Details of P & IDs
A solution
23. PV=nRT - Boyle's law and Charle's law combined
Total heat required for change of state
8908 kJ
One angle is exactly 90 degrees
General gas law
24. Negative terminal of the rectifier must always be connected to the structure that is being protected
Problem solving order
Dividing the ultimate strength by the factor of safety
Calorimetry
Cathodic protection system
25. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Mensuration
Purpose of material balance
Heat engines
M x g x h (kg x 9.81 m/s/s x height (m))
26. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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27. The factor of safety is always expressed...
Resultant
Specific heat
Isosceles triangle
As a ratio
28. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Octagon
Total heat required for change of state
To calculate power from an engine
Heat engines
29. A straight line that joins 2 points or circumference
Calorimetry
Chord
Sensible heat
Isosceles triangle
30. Compounds classified as salts may have the following characteristics
A. sine of 90
distance
Ammonia
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
31. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Tangent
A. sine of 90
Stroke
M x g x h (kg x 9.81 m/s/s x height (m))
32. 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
ellipse
General gas law
Greater than 180 degrees
Relative density
33. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
The elastic limit of the material is not exceeded
Adiabatic
A. sine of 90
Heat engines
34. Protons have a mass number of...
Problem solving order
water equivalent
Resultant
One
35. Whether a material will break under sudden impact or hard blow
Isosceles triangle
Toughness
Calorimetry
520.72 kJ/kg
36. A 10 m long steel pipe when heated to increase its temperature by 85
To calculate power from an engine
1 cm
Stray current corrosion
Be the same at any point in the process
37. The term _____ is used as a measure of the quantity of matter.
Mass
Sensible heat
Opposite side / hypotenuse
A Greek letter alpha linear
38. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
distance
Mass x acceleration (N)
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
polytropic
39. The moment of a force about a point is...
latent heat of evaporation (vaporation)
The specific heat of the material
elasticity
A twisting or turning effect
40. Work per second
Pm x A x L x N
Cathodic protection system
4.4 m/s
179.02
41. When calculating the ultimate stress of a material - we should
Divide the maximum load by the original cross - sectional area
benefits of chromium
A
Ultimate stress/working stress
42. Acute angle
Less than 90 degrees
Trapezoid
26.81 m/s
Hooke's Law
43. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
1 cm
2.3026
brinell hardness test
Latent heat of evaporation
44. The temperature of saturated steam vapor at 980 kPa is...
179.02
Purpose of material balance
57.48 mm
effective pressure
45. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
displacement
110.6 kPa
Stroke
One
46. A quadrilateral with two parallel sides
M x g x h (kg x 9.81 m/s/s x height (m))
Work
Trapezoid
Purpose of material balance
47. Obtuse angle
Chlorides
More than 90 degrees
Calorimetry
Ultimate stress/working stress
48. The precise measurement of heat flow out of a system for chemical and physical processes
Greater than 180 degrees
The equilibrant
Calorimetry
Gamma - coefficient of superficial = 2x coefficient of linear expansion
49. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Scalene triangle
70 MPa
Pm x A x L x N
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
50. The most common material used in making large industrial diesel engine pistons is...
velocity
Material balance
Cast iron
As a ratio
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