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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...
Trapezoid
That is supported at two ends
70 MPa
A. sine of 90
2. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
benefits of chromium - nickel and copper in alloy steels
dryness fraction
Stroke
Pm x A x L x N
3. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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4. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
As a ratio
70 MPa
White
polygon
5. The precise measurement of heat flow out of a system for chemical and physical processes
Calorimetry
A. sine of 90
Isothermal
26.81 m/s
6. 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
ellipse
Power
Pm x A x L x N
Be the same at any point in the process
7. Malleable cast iron is produced by...
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
One
Heating and cooling white cast iron at a controlled rate
110.6 kPa
8. A straight line that joins 2 points or circumference
Chord
4.4 m/s
benefits of nickel
Exactly 180 degrees
9. Acute angle
Celsius
A = 4/3h2 [(square root)d/h-0.608]
Less than 90 degrees
Be the same at any point in the process
10. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Purpose of material balance
Stroke
Heating and cooling white cast iron at a controlled rate
Hooke's Law
11. Negative terminal of the rectifier must always be connected to the structure that is being protected
Purpose of P & IDs
elasticity
ellipse
Cathodic protection system
12. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
effective pressure
Boyle's law
One
Work
13. Means that the sum of the matter leaving the plant equals the sum of the matter entering
As a ratio
Material balance
Transformed to different forms
Continuity flow
14. Expansion of a gas is said to be adiabatic when expansion takes place at...
To calculate power from an engine
Falling temperature
View of a cutting plane
Specific heat
15. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
dryness fraction
Stroke
The equilibrant
Specific heat
16. P & IDs
basic oxygen process
Details of P & IDs
Pm x A x L
Mechanical flow diagrams
17. A 1 N weight has a kinetic energy of 1 J when its speed is...
A. sine of 90
4.4 m/s
Stroke
A
18. 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
57.48 mm
Material balance
Resultant
19. Being made of 2 or more substances creating unique characteristics and properties when combine
Process flow drawing
Tangent
Ammonia
Composite material
20. A quadrilateral with no parallel sides
Trapezium
Continuity flow
Mechanical flow diagrams
A number with the necessary unit
21. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
hexagon
45 kN
1/2mv2 (kg x velocity(m/s))
Specific heat
22. The classes of fastening devices are...
Permanent and removable
Charles Law
elasticity
Work
23. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.
benefits of nickel
brinell hardness test
One
As a ratio
24. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
White
Specific heat
Mass x acceleration (N)
Areas of sectors (bounded by 2 radii and arc between them)
25. The most common material used in making large industrial diesel engine pistons is...
A
Cast iron
Power
Problem solving order
26. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Mensuration
Scalene triangle
water equivalent
polytropic
27. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Power
Chord
velocity
Chlorides
28. Sine Rule
Cast iron
A / SinA = b / SinB = c / SinC
0.0002
benefits of chromium
29. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Latent heat of evaporation
520.72 kJ/kg
Trapezoid
30. Energy can be...
Ultimate stress/working stress
Scalene triangle
Transformed to different forms
Heat engines
31. 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...
Increase
Scalene triangle
10.8 m N of W
effective pressure
32. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
White metal and bronze
Falling temperature
1/2mv2 (kg x velocity(m/s))
33. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
Conditions required to produce sulphide corrosion cracking
benefits of chromium
Material balance
To calculate power from an engine
34. As the cosine decreases - the...
Value of the angle increases
distance
Sensible heat
161
35. 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)
179.02
polytropic
Purpose of P & IDs
linear motion relationships
36. Kinetic energy (Ek)
To calculate power from an engine
A solution
1/2mv2 (kg x velocity(m/s))
White metal and bronze
37. A parallelogram with four equal sides
Pm x A x L x N
Areas of sectors (bounded by 2 radii and arc between them)
Continuity flow
Rhombus
38. Resistance to wear - abrasion and penetration
hardness
hexagon
Scalene triangle
Tangent
39. The term _____ is used as a measure of the quantity of matter.
Rhombus
Specific heat
Sulfuric acid
Mass
40. A closed plane figure bounded by straight sides
The specific heat of the material
Cast iron
polygon
Material balance
41. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Toughness
Opposite side / hypotenuse
Stroke
Purpose of material balance
42. A gas occupies 8.62 m3 at 1800 kPa and 26
Ammonia
Mechanical flow diagrams
Calorimetry
161
43. Factor of safety
Celsius
Ultimate stress/working stress
Dividing the ultimate strength by the factor of safety
Process flow drawing
44. When classifying beams - the term simple beam refers to a beam
Rhombus
That is supported at two ends
1/2mv2 (kg x velocity(m/s))
Mass x acceleration (N)
45. 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
Mensuration
latent heat of evaporation (vaporation)
Relative density
Latent heat of evaporation
46. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Conditions required to produce sulphide corrosion cracking
Mensuration
10.8 m N of W
latent heat of evaporation (vaporation)
47. Protons have a mass number of...
A. sine of 90
Areas of sectors (bounded by 2 radii and arc between them)
One
Boyle's law
48. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Cast iron
basic oxygen process
57.48 mm
1/2mv2 (kg x velocity(m/s))
49. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Falling temperature
Power
1 cm
Latent heat of evaporation
50. Work per second
polytropic
1 cm
Tangent
Pm x A x L x N