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Test your basic knowledge |
Mechanical 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 change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Mechanical Advantage
Mechanical Advantage Equation
Acceleration
Third Stroke (4 Stroke Engine)
2. Mass can neither by created nor destroyed - only transformed
Area of a circle equation
Hydraulic Cylinders
Law of Conservation of Mass
If the force is applied at the center of the rotation
3. (Force)(Distance)/Seconds
Engineers and scientists need a common language
Rotary
Conversions
Power Equation
4. Describes a physical property of anything - What we are measuring
Force Equation
Dimension
Pythagorean Theorem Equation
Force lets us do work on a system
5. Static - Dynamic
Mass
Power Equation
Temperature
Mechanics describe how forces affect a body
6. Air is compressed - work is done on the system
Length
Engineers and scientists need a common language
Vectors
Second Stroke (Diesel Engine)
7. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo
Work
Mass
Area
Newton's First Law of Motion
8. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs
Machine
2 Stroke Engine
Mass
Velocity
9. Allows comparison between different measuring systems and units - Necessary to market internationally
will move
Derived Dimension
Conversions
Moment Arm
10. Liquid or gas
Force lets us do work on a system
Area
Fluid
Fourth Stroke (Diesel Engine)
11. Describes how applied forces bring a body into motion
Mechanical Advantage
Newton's Third Law
Dynamics
Pythagorean Theorem
12. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Power
Newton's Third Law
Pythagorean Theorem
Disc Breaks
13. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Component
First Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
Law of Conservation of Mass
14. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Force Equation
Drum Brakes
Closed System
4 Stroke Engine
15. Rotation will not occur - but translation might occur
Mechanics
no movement
If the force is applied at the center of the rotation
Area Equation
16. When the work done by the effort exceeds the work done by the load - the load...
Mechanical Engineering
will move
Second Stroke (Diesel Engine)
Volume
17. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Newton's Third Law
Weight
Derived Dimension
18. Intake of fuel and air mixture - compression of mixture by piston
First Stroke (2 Stroke Engine)
Forces and Vectors
US Customary
Newton's First Law of Motion
19. The force simple machines use to do work on a single load or against a single force
Work
First Stroke (4 Stroke Engine)
Tension
Effort
20. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
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21. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion
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22. Piston travels up and both plugs are closed
Fourth Stroke (Diesel Engine)
If the force is applied away from the center of rotation
Surroundings
Second Stroke (4 Stroke Engine)
23. Ignition - power stroke
Hybrid Series
Third Stroke (rotary)
Diesel Engine
System
24. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out
Open System
Common Brake Characteristics
Pythagorean Theorem Equation
Direction of Forces
25. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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26. Psi - newtons - pascals
Units for Pressure
First Stroke (2 Stroke Engine)
Dynamics
Disc Breaks
27. Compression of fuel mix
Internal Combustion Engine Types
more than one force
Second Stroke (rotary)
Units
28. A pull on an object
Hybrid
System
Tension
More than one force
29. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Velocity
Dynamics
Work
30. Force x Distance
Dynamics
If the force is applied at the center of the rotation
Volume
Moment Arm Equation
31. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Vectors
Forces and Vectors
Second Stroke (4 Stroke Engine)
Length
32. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Result of Applying a force to a rigid body at rest
Derived Dimension
Volume
Translation
33. One that pushes on an object
Moment Arm Equation
Hydrodynamics
Compression
Rotary
34. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Force Equation
Fluid Power
more than one force
Pythagorean Theorem Equation
35. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)
Power
Internal Combustion Engine Types
Third Stroke (4 Stroke Engine)
Second Stroke (Diesel Engine)
36. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward
Newton's Second Law
Fluid Power
US Customary
Hybrid Series
37. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Mass
more than one force
Area of a circle equation
38. Mechanics is an application of math that describes how forces affect a body
Law of Conservation of Mass
Aerodynamics
Units
Mechanics
39. Exhaust of combustion products
Fourth Stroke (rotary)
System
Force lets us do work on a system
Disc Breaks
40. Applied at an angle or parallel to a surface
Conversions
Third Stroke (4 Stroke Engine)
2 Stroke Engine
Shear
41. When the moving fluid is a gas
Aerodynamics
Effort
Steam Engine
If the force is applied away from the center of rotation
42. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
Fluid Power
Machine
43. Length x Width
Area Equation
Third Stroke (rotary)
Common Brake Characteristics
Newton's Second Law
44. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Result of Applying a force to a rigid body at rest
no movement
Pressure
Statics
45. The branch of science and engineering involving measurement
Area
Hydrodynamics
Metrology
Hydrostatics
46. Compression-Tension-Shear
Direction of Forces
Volume
System International (SI)
decrease
47. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Inclined Plane
Hybrid Parallel
Aerodynamics
Second Stroke (Diesel Engine)
48. Body in motion (car)
Open System
Moment Arm Equation
Hybrid Series
Dynamics
49. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people
more than one force
Mechanics describe how forces affect a body
Hydraulic Cylinders
4 Stroke Engine
50. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Third Stroke (Diesel Engine)
Power Equation
Fluids
Power