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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. 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
Calorimetry
Relative density
Charles Law
White metal and bronze
2. A 1 N weight has a kinetic energy of 1 J when its speed is...
Chlorides
4.4 m/s
Opposite side / hypotenuse
velocity
3. Sine Rule
1 cm
benefits of copper
Specific heat
A / SinA = b / SinB = c / SinC
4. The classes of fastening devices are...
0.89
110.6 kPa
Permanent and removable
A
5. Mechanical efficiency
Output power(W)/input power(W)
Greater than 180 degrees
26.81 m/s
That is supported at two ends
6. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
benefits of nickel
Stroke
Resultant
Naperian (Natural) logarithms
7. PV=nRT - Boyle's law and Charle's law combined
Stress corrosion cracking
Purpose of P & IDs
Coefficient of friction
General gas law
8. 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
45 kN
Continuity flow
Ideal mechanical advantage
Heating and cooling white cast iron at a controlled rate
9. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
Coefficient of friction
Cast iron
basic oxygen process
That is supported at two ends
10. 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
1/2mv2 (kg x velocity(m/s))
basic oxygen process
Relative density
161
11. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
To calculate power from an engine
110.6 kPa
Dividing the ultimate strength by the factor of safety
A = 4/3h2 [(square root)d/h-0.608]
12. A straight line that joins 2 points or circumference
Chord
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Complementary angles
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
13. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
1/2mv2 (kg x velocity(m/s))
Purpose of material balance
Specific heat
Isosceles triangle
14. The moment of a force about a point is...
A Greek letter alpha linear
A twisting or turning effect
Stroke
179.02
15. Stainless fails due to...
Less than 90 degrees
Greater than 180 degrees
Cathodic protection system
Chlorides
16. Kinetic energy (Ek)
Complementary angles
Rhomboid
1/2mv2 (kg x velocity(m/s))
elasticity
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
Heating and cooling white cast iron at a controlled rate
Greater than 180 degrees
A = 4/3h2 [(square root)d/h-0.608]
0.0723
18. A quadrilateral with two parallel sides
Stress corrosion cracking
Trapezoid
Isosceles triangle
Continuity flow
19. coefficient of superficial (area) expansion
The equilibrant
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Stroke
That is supported at two ends
20. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
benefits of chromium - nickel and copper in alloy steels
70 MPa
Specific heat
Trapezoid
21. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
distance
A
benefits of copper
One angle is exactly 90 degrees
22. coefficient of volumetric expansion
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183
23. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
benefits of chromium - nickel and copper in alloy steels
Permanent and removable
Divide the maximum load by the original cross - sectional area
Trapezoid
24. 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
Trapezium
One
Chord
25. Potential energy (Ep)
M x g x h (kg x 9.81 m/s/s x height (m))
2.3026
8908 kJ
Heat engines
26. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
basic oxygen process
Purpose of material balance
Naperian (Natural) logarithms
Process flow drawing
27. The most common material used in making large industrial diesel engine pistons is...
Mass x acceleration (N)
Cast iron
Sulfuric acid
To calculate power from an engine
28. A triangle with two equal sides
0.0002
Isosceles triangle
161
benefits of chromium
29. 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)
26.81 m/s
linear motion relationships
Process flow drawing
179.02
30. Malleable cast iron is produced by...
polygon
Rhomboid
Power
Heating and cooling white cast iron at a controlled rate
31. 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
basic oxygen process
Relative density
161
ellipse
32. 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
Stray current corrosion
benefits of chromium
Gamma - coefficient of superficial = 2x coefficient of linear expansion
View of a cutting plane
33. Micro organisms promote corrosion...
Coefficient of friction
The equilibrant
polytropic
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
34. When calculating the ultimate stress of a material - we should
Divide the maximum load by the original cross - sectional area
2.3026
Octagon
Composite material
35. A gas occupies 8.62 m3 at 1800 kPa and 26
161
Be the same at any point in the process
8908 kJ
0.0723
36. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Malleability
To calculate power from an engine
57.48 mm
110.6 kPa
37. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
2.3026
Increase
A twisting or turning effect
Divide the maximum load by the original cross - sectional area
38. 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
Charles Law
Purpose of P & IDs
benefits of nickel
hexagon
39. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
520.72 kJ/kg
26.81 m/s
Stroke
Continuity flow
40. PVn(super script n) = C
Purpose of material balance
Mensuration
Permanent and removable
polytropic
41. A triangle with no two sides of equal length
Divide the maximum load by the original cross - sectional area
Scalene triangle
Falling temperature
elasticity
42. When classifying beams - the term simple beam refers to a beam
One
Coefficient of friction
1 cm
That is supported at two ends
43. Of a process or change taking place at constant temperature - PV = C
Hooke's Law
0.89
161
Isothermal
44. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
520.72 kJ/kg
110.6 kPa
Ammonia
0.0002
45. Ability to withstand deformation above elastic limit under compression without failure
benefits of copper
Malleability
Calorimetry
179.02
46. Reflex angle
Ammonia
Greater than 180 degrees
Latent heat of evaporation
Unified National
47. Orthographic projection means...
1/2mv2 (kg x velocity(m/s))
basic oxygen process
Power
View of a cutting plane
48. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Details of P & IDs
Ammonia
8908 kJ
Rhombus
49. 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% -
benefits of nickel
Hooke's Law
10.8 m N of W
Dividing the ultimate strength by the factor of safety
50. Force
Octagon
Trapezoid
Celsius
Mass x acceleration (N)