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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 closed plane figure bounded by straight sides
polygon
Chlorides
8908 kJ
benefits of chromium
2. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Work
Heating and cooling white cast iron at a controlled rate
White metal and bronze
161
3. PFDs
Process flow drawing
Increase
A number with the necessary unit
Material balance
4. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
45 kN
hardness
520.72 kJ/kg
26.81 m/s
5. A scalar quantity is one which has only magnitude and can be fully described by...
Exactly 180 degrees
Stroke
A number with the necessary unit
Isosceles triangle
6. A quadrilateral with no parallel sides
Trapezium
26.81 m/s
Sulfuric acid
Relative density
7. Force
Mass x acceleration (N)
Relative density
distance
Permanent and removable
8. 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
2.3026
displacement
Sulfuric acid
161
9. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Sensible heat
linear motion relationships
The elastic limit of the material is not exceeded
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
10. Cosine rule
The elastic limit of the material is not exceeded
A
Rhomboid
M x g x h (kg x 9.81 m/s/s x height (m))
11. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
water equivalent
To calculate power from an engine
0.0002
That is supported at two ends
12. In the equation 0.004 + D = 0.0042 - the value of D is...
Malleability
0.0002
Sulfuric acid
A twisting or turning effect
13. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Work
water equivalent
70 MPa
Rhomboid
14. Potential energy (Ep)
General gas law
Coefficient of friction
Toughness
M x g x h (kg x 9.81 m/s/s x height (m))
15. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Material balance
520.72 kJ/kg
Unified National
Adiabatic
16. The temperature of saturated steam vapor at 980 kPa is...
179.02
Sulfuric acid
Unified National
Work
17. The precise measurement of heat flow out of a system for chemical and physical processes
A
velocity
Calorimetry
0.0723
18. PV=nRT - Boyle's law and Charle's law combined
General gas law
Purpose of material balance
Falling temperature
Chlorides
19. When calculating the ultimate stress of a material - we should
0.0002
View of a cutting plane
Divide the maximum load by the original cross - sectional area
Sensible heat
20. Of a process or change taking place at constant temperature - PV = C
Continuity flow
Conditions required to produce sulphide corrosion cracking
Isothermal
distance
21. The moment of a force about a point is...
Isothermal
A twisting or turning effect
Mass
Divide the maximum load by the original cross - sectional area
22. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
Conditions required to produce sulphide corrosion cracking
70 MPa
Permanent and removable
polytropic
23. coefficient of expansion
Hooke's Law
hexagon
A Greek letter alpha linear
Trapezium
24. The rate at which heat flow through a slab of a material does not depend on...
elasticity
Pm x A x L
Purpose of material balance
The specific heat of the material
25. Sine Rule
A solution
Malleability
Conditions required to produce sulphide corrosion cracking
A / SinA = b / SinB = c / SinC
26. Being made of 2 or more substances creating unique characteristics and properties when combine
More than 90 degrees
Composite material
benefits of copper
Mass
27. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
Value of the angle increases
hexagon
Sensible heat
28. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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183
29. Obtuse angle
White metal and bronze
More than 90 degrees
Chlorides
benefits of nickel
30. Force - work done - power - mechanical efficiency
Problem solving order
linear motion relationships
Cast iron
2.3026
31. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Chlorides
Composite material
benefits of copper
179.02
32. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
brinell hardness test
Gamma - coefficient of superficial = 2x coefficient of linear expansion
effective pressure
ellipse
33. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Ideal mechanical advantage
Power
water equivalent
34. 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.
0.0002
brinell hardness test
Permanent and removable
110.6 kPa
35. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
benefits of chromium
Stroke
Sensible heat
0.89
36. A parallelogram with adjacent sides of unequal lengths
Boyle's law
Rhomboid
benefits of nickel
Value of the angle increases
37. Kinetic energy (Ek)
Divide the maximum load by the original cross - sectional area
A
Continuity flow
1/2mv2 (kg x velocity(m/s))
38. 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% -
Sulfuric acid
benefits of nickel
Mensuration
Rhomboid
39. Copper fails due to...
Celsius
Trapezium
Ammonia
Stroke
40. coefficient of volumetric expansion
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183
41. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
The specific heat of the material
View of a cutting plane
57.48 mm
Complementary angles
42. Resistance to wear - abrasion and penetration
benefits of copper
Continuity flow
hardness
elasticity
43. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Less than 90 degrees
Heat engines
2.3026
Exactly 180 degrees
44. The term _____ is used as a measure of the quantity of matter.
Heat engines
Be the same at any point in the process
Mass
Conditions required to produce sulphide corrosion cracking
45. 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
Transformed to different forms
benefits of copper
More than 90 degrees
Stress corrosion cracking
46. Compounds classified as salts may have the following characteristics
hexagon
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Chlorides
Toughness
47. A quadrilateral with two parallel sides
Trapezoid
Sensible heat
Unified National
dryness fraction
48. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Mass x acceleration (N)
0.0002
Material balance
110.6 kPa
49. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
0.0002
Purpose of material balance
Calorimetry
displacement
50. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Hooke's Law
Stroke
Total heat required for change of state
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only