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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. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
57.48 mm
Dividing the ultimate strength by the factor of safety
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Latent heat of evaporation
2. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
velocity
520.72 kJ/kg
Be the same at any point in the process
Hooke's Law
3. The moment of a force about a point is...
Work
benefits of nickel
4.4 m/s
A twisting or turning effect
4. When calculating the ultimate stress of a material - we should
Permanent and removable
8908 kJ
Divide the maximum load by the original cross - sectional area
Sulfuric acid
5. 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
velocity
Rhomboid
Purpose of P & IDs
Less than 90 degrees
6. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
polygon
Details of P & IDs
A = 4/3h2 [(square root)d/h-0.608]
Be the same at any point in the process
7. The most common material used in making large industrial diesel engine pistons is...
Trapezium
Cast iron
water equivalent
Malleability
8. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
The specific heat of the material
26.81 m/s
water equivalent
Isosceles triangle
9. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Resultant
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
110.6 kPa
Dividing the ultimate strength by the factor of safety
10. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Value of the angle increases
One angle is exactly 90 degrees
Material balance
45 kN
11. A closed plane figure bounded by straight sides
Pm x A x L
Continuity flow
1 cm
polygon
12. Potential energy (Ep)
Calorimetry
Resultant
179.02
M x g x h (kg x 9.81 m/s/s x height (m))
13. Whether a material will break under sudden impact or hard blow
One angle is exactly 90 degrees
Transformed to different forms
polytropic
Toughness
14. 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
A. sine of 90
Relative density
Areas of sectors (bounded by 2 radii and arc between them)
0.0723
15. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Falling temperature
Unified National
Heat engines
Calorimetry
16. 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
Stroke
10.8 m N of W
benefits of copper
Stress corrosion cracking
17. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
velocity
Ultimate stress/working stress
0.0002
Unified National
18. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
General gas law
Resultant
Stress corrosion cracking
Dividing the ultimate strength by the factor of safety
19. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
White
benefits of nickel
Falling temperature
20. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
More than 90 degrees
10.8 m N of W
Celsius
benefits of chromium - nickel and copper in alloy steels
21. Work per second
Heating and cooling white cast iron at a controlled rate
Pm x A x L x N
Greater than 180 degrees
Power
22. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
Trapezium
distance
Total heat required for change of state
Malleability
23. Straight angle
Exactly 180 degrees
4.4 m/s
The specific heat of the material
One
24. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
A. sine of 90
benefits of copper
basic oxygen process
Specific heat
25. Mechanical efficiency
Resultant
M x g x h (kg x 9.81 m/s/s x height (m))
Ultimate stress/working stress
Output power(W)/input power(W)
26. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Heating and cooling white cast iron at a controlled rate
Work
benefits of chromium
110.6 kPa
27. A 10 m long steel pipe when heated to increase its temperature by 85
Pm x A x L x N
Unified National
Falling temperature
1 cm
28. Obtuse angle
latent heat of evaporation (vaporation)
water equivalent
More than 90 degrees
Cathodic protection system
29. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
benefits of nickel
A Greek letter alpha linear
4.4 m/s
Increase
30. 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
To calculate power from an engine
Continuity flow
ellipse
Complementary angles
31. When classifying beams - the term simple beam refers to a beam
Continuity flow
That is supported at two ends
Tangent
Gamma - coefficient of superficial = 2x coefficient of linear expansion
32. Negative terminal of the rectifier must always be connected to the structure that is being protected
Cathodic protection system
hardness
velocity
Total heat required for change of state
33. Micro organisms promote corrosion...
Ideal mechanical advantage
Stroke
Ammonia
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
34. 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
A / SinA = b / SinB = c / SinC
effective pressure
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Charles Law
35. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
10.8 m N of W
Stroke
0.89
elasticity
36. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Toughness
Specific heat
Heating and cooling white cast iron at a controlled rate
37. The temperature of saturated steam vapor at 980 kPa is...
Trapezoid
brinell hardness test
179.02
Celsius
38. The most common thread used in North America on fasteners such as bolts - is the...
Unified National
M x g x h (kg x 9.81 m/s/s x height (m))
ellipse
elasticity
39. 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...
Resultant
10.8 m N of W
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Malleability
40. Compounds classified as salts may have the following characteristics
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
A Greek letter alpha linear
A number with the necessary unit
Resultant
41. Acute angle
A Greek letter alpha linear
Conditions required to produce sulphide corrosion cracking
Less than 90 degrees
Octagon
42. Orthographic projection means...
A. sine of 90
Specific heat
View of a cutting plane
Be the same at any point in the process
43. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
The specific heat of the material
basic oxygen process
70 MPa
More than 90 degrees
44. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Material balance
Purpose of material balance
benefits of chromium
elasticity
45. 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
benefits of nickel
Falling temperature
displacement
1/2mv2 (kg x velocity(m/s))
46. 1. In a right angle triangle - the sine of an acute angle is equal to...
Details of P & IDs
Calorimetry
Opposite side / hypotenuse
A
47. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
As a ratio
Naperian (Natural) logarithms
To calculate power from an engine
48. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
8908 kJ
polygon
water equivalent
Permanent and removable
49. Resists oxidation - high strength at high temperatures - increases hardness and abrasion resistance without increasing brittleness - increases response to heat treatment - increases depth of hardness penetration - at 12% chromium steel with not tarni
Resultant
Hooke's Law
Ideal mechanical advantage
benefits of chromium
50. A triangle with no two sides of equal length
Purpose of P & IDs
Continuity flow
M x g x h (kg x 9.81 m/s/s x height (m))
Scalene triangle