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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. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Component
Moment Arm
Diesel Engine
2. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Work
Engineers and scientists need a common language
System International (SI)
3. One that pushes on an object
no movement
Conversions
Vectors
Compression
4. 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)
First Stroke (Diesel Engine)
First Stroke (2 Stroke Engine)
Power
Mechanical Advantage
5. ...
Applied Brakes
US Customary
System International (SI)
Force lets us do work on a system
6. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Internal Combustion Engine Types
Base Dimensions
Hybrid Series
Forces and Vectors
7. (Force)(Distance)/Seconds
Pythagorean Theorem
Forces
Power Equation
Closed System
8. What we are studying
Dynamics
Mechanical Engineering
Pressure Equation
System
9. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Shear
Third Stroke (4 Stroke Engine)
Weight
10. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons
Moment Arm Equation
Newton's Second Law
Hybrid Series
Rotary
11. Mechanics is an application of math that describes how forces affect a body
Second Stroke (Diesel Engine)
Mechanics
Dimension
Pythagorean Theorem Equation
12. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Conversions
Fluid Power
Hydrodynamics
13. Combustion ignited by spark plug and materials are compressed
Dynamics
Mechanical Advantage Equation
Translation
Third Stroke (4 Stroke Engine)
14. 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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15. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Diesel Engine
Equilibrium
Conversions
Fluids
16. When the moving fluid is a gas
Mechanical Advantage
Vectors
Power Equation
Aerodynamics
17. Rotation will not occur - but translation might occur
Temperature
If the force is applied at the center of the rotation
Mechanical Engineering
Aerodynamics
18. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
Result of Applying a force to a rigid body at rest
Component
Newton's First Law of Motion
19. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Translation
Volume
Surroundings
20. What we are not studying
Surroundings
Mechanical Engineering
Third Stroke (rotary)
System
21. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Mechanical Advantage
Pascal's Principle
Aerodynamics
22. 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
Gravity
Fluid
4 Stroke Engine
Component
23. Piston travels up and both plugs are closed
Component
Third Stroke (rotary)
Second Stroke (4 Stroke Engine)
US Customary
24. A pull on an object
Mechanical Advantage Equation
Moment Arm
Tension
Mechanics
25. Describes how applied forces bring a body into motion
Velocity
Newton's Second Law
Dynamics
Conversions
26. Three- dimensional property measured in units of length times length times length =length x width x height
Fluid
Velocity
Volume
Work
27. Ignition - power stroke
First Stroke (4 Stroke Engine)
System
decrease
Third Stroke (rotary)
28. Length x Width x Height
Length
Volume
Moment Arm
Second Stroke (2 Stroke Engine)
29. Psi - newtons - pascals
Newton's Third Law
Disc Breaks
Units for Pressure
Newton's First Law of Motion
30. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Direction of Forces
Base Dimensions
System
31. 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
Mass
Hydrodynamics
Statics
System
32. A^2+b^2=c^2
Fluids
Pythagorean Theorem Equation
Pascal's Principle
Hydraulic Cylinders
33. Force x Distance
Gravity
Pressure
Newton's Third Law
Moment Arm Equation
34. Length x Width
System
Pythagorean Theorem
Effort
Area Equation
35. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Law of Conservation of Mass
Units
Area Equation
Work
36. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Pythagorean Theorem
Power Equation
Dynamics
First Stroke (Diesel Engine)
37. When the work done by the effort exceeds the work done by the load - the load...
more than one force
Disc Breaks
will move
Moment Arm
38. An indication of kinetic energy of mass at the molecular level
First Stroke (rotary)
Temperature
Fluid Power
more than one force
39. Force/Area
more than one force
Pressure Equation
Surroundings
Aerodynamics
40. Exhaust
Fourth Stroke (Diesel Engine)
more than one force
Forces
Aerodynamics
41. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
If the force is applied away from the center of rotation
Pythagorean Theorem Equation
Law of Conservation of Mass
Component
42. Exhaust of combustion products
Fourth Stroke (rotary)
Hybrid Series
Mechanical Advantage
If the force is applied away from the center of rotation
43. Weight/Time
Power Equation
If the force is applied away from the center of rotation
Conversions
Base Dimensions
44. The magnitude of something in a particular direction
Mechanical Advantage
Second Stroke (4 Stroke Engine)
Length
Velocity
45. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Static
Work
Pressure
Derived Dimension
46. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Power Equation
Gravity
System
Fourth Stroke (4 Stroke Engine)
47. A combination of components
US Customary
Inclined Plane
Volume
System
48. Same pressure - work - volume - Different forces and distances
Hydraulic Cylinders
Diesel Engine
Direction of Forces
Rotation
49. Body at rest or is in equilibrium (wall)
System International (SI)
Static
Internal Combustion Engine Types
Forces and Vectors
50. Force without machine/Force with machine
Mechanical Advantage Equation
Mechanical Engineering
Rotation
Drum Brakes