SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
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 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
Relative density
hardness
10.8 m N of W
2. 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
Ammonia
Specific heat
Octagon
A. sine of 90
3. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
Continuity flow
water equivalent
distance
benefits of chromium - nickel and copper in alloy steels
4. 1. In a right angle triangle - the sine of an acute angle is equal to...
Isothermal
Conditions required to produce sulphide corrosion cracking
Opposite side / hypotenuse
Chord
5. A parallelogram with adjacent sides of unequal lengths
Transformed to different forms
Rhomboid
8908 kJ
Sulfuric acid
6. Straight angle
Exactly 180 degrees
polygon
Latent heat of evaporation
Resultant
7. Whether a material will break under sudden impact or hard blow
Dividing the ultimate strength by the factor of safety
70 MPa
velocity
Toughness
8. Negative terminal of the rectifier must always be connected to the structure that is being protected
8908 kJ
Cathodic protection system
benefits of nickel
dryness fraction
9. coefficient of expansion
0.0723
110.6 kPa
A Greek letter alpha linear
To calculate power from an engine
10. When heat is supplied to a liquid in sufficient quantity to change the liquid to a vapour without changing the temperature - the heat supplied is known as...
velocity
Latent heat of evaporation
4.4 m/s
Specific heat
11. A parallelogram with four equal sides
polytropic
Rhombus
Falling temperature
A
12. Energy can be...
displacement
Transformed to different forms
A solution
57.48 mm
13. The act or process of measuring
Output power(W)/input power(W)
Power
Mensuration
Mechanical flow diagrams
14. The temperature of saturated steam vapor at 980 kPa is...
179.02
A twisting or turning effect
Mass
polytropic
15. coefficient of superficial (area) expansion
Naperian (Natural) logarithms
A solution
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Stroke
16. Sine Rule
Conditions required to produce sulphide corrosion cracking
A / SinA = b / SinB = c / SinC
One angle is exactly 90 degrees
Hooke's Law
17. Pythagoras' Theorem
520.72 kJ/kg
A
White metal and bronze
Value of the angle increases
18. 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)
dryness fraction
Mass x acceleration (N)
linear motion relationships
Adiabatic
19. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
A solution
0.89
2.3026
White
20. When classifying beams - the term simple beam refers to a beam
Trapezium
That is supported at two ends
Process flow drawing
A twisting or turning effect
21. Any two angles whose sum is 90
Conditions required to produce sulphide corrosion cracking
0.0723
Stress corrosion cracking
Complementary angles
22. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Heating and cooling white cast iron at a controlled rate
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Total heat required for change of state
The equilibrant
23. 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...
1/2mv2 (kg x velocity(m/s))
Trapezium
10.8 m N of W
Transformed to different forms
24. 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
Isothermal
0.0723
Be the same at any point in the process
25. The most common material used in making large industrial diesel engine pistons is...
Cast iron
water equivalent
Coefficient of friction
A Greek letter alpha linear
26. A 1 N weight has a kinetic energy of 1 J when its speed is...
4.4 m/s
70 MPa
Naperian (Natural) logarithms
Sensible heat
27. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
A
displacement
Sensible heat
The elastic limit of the material is not exceeded
28. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Composite material
latent heat of evaporation (vaporation)
1/2mv2 (kg x velocity(m/s))
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
29. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
dryness fraction
Isosceles triangle
View of a cutting plane
30. 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
effective pressure
Purpose of material balance
4.4 m/s
benefits of chromium
31. A 10 m long steel pipe when heated to increase its temperature by 85
1 cm
Stress corrosion cracking
Malleability
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
32. PVn(super script n) = C
polytropic
Rhombus
0.0002
Gamma - coefficient of superficial = 2x coefficient of linear expansion
33. Being made of 2 or more substances creating unique characteristics and properties when combine
M x g x h (kg x 9.81 m/s/s x height (m))
hardness
That is supported at two ends
Composite material
34. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Stroke
Work
Greater than 180 degrees
Mass
35. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
benefits of copper
Divide the maximum load by the original cross - sectional area
179.02
Stress corrosion cracking
36. Kinetic energy (Ek)
1/2mv2 (kg x velocity(m/s))
Problem solving order
The specific heat of the material
A / SinA = b / SinB = c / SinC
37. A quadrilateral with two parallel sides
A
Mechanical flow diagrams
161
Trapezoid
38. In the equation 0.004 + D = 0.0042 - the value of D is...
A. sine of 90
0.0002
That is supported at two ends
A / SinA = b / SinB = c / SinC
39. 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.
brinell hardness test
10.8 m N of W
Continuity flow
Rhombus
40. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
Be the same at any point in the process
Heating and cooling white cast iron at a controlled rate
Celsius
41. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
The specific heat of the material
benefits of copper
Specific heat
Boyle's law
42. 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% -
hardness
benefits of nickel
Hooke's Law
0.0002
43. 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
distance
Power
Continuity flow
A = 4/3h2 [(square root)d/h-0.608]
44. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
benefits of chromium - nickel and copper in alloy steels
Isothermal
45 kN
Resultant
45. coefficient of volumetric expansion
46. 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
That is supported at two ends
A Greek letter alpha linear
Stress corrosion cracking
A solution
47. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Falling temperature
Details of P & IDs
0.0723
48. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain
49. One is the trigonometric value of...
Pm x A x L
A. sine of 90
benefits of chromium
The equilibrant
50. 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
0.0723
The specific heat of the material
Sensible heat