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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
Tension
Conversions
Hybrid Series
Couple
2. One that pushes on an object
Mechanical Advantage Equation
Compression
Conversions
Gravity
3. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Diesel Engine
Aerodynamics
Translation
4. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Temperature
Hybrid Parallel
Common Brake Characteristics
Steam Engine
5. 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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6. (Force)(Distance)/Seconds
Open System
Dynamics
Result of Applying a force to a rigid body at rest
Power Equation
7. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
2 Stroke Engine
Fluid Power
Mechanical Engineering
Fluids
8. Often a free body has _______ acting on it
more than one force
Hydrostatics
Fourth Stroke (Diesel Engine)
Pythagorean Theorem Equation
9. Three- dimensional property measured in units of length times length times length =length x width x height
Acceleration
Volume
Mechanics describe how forces affect a body
Power
10. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Drum Brakes
Disc Breaks
First Stroke (rotary)
Law of Conservation of Mass
11. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Dynamics
Base Dimensions
Drum Brakes
Hydrodynamics
12. Weight/Time
Moment Arm
Diesel Engine
Power Equation
Static
13. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq
Hybrid Parallel
Hydraulics
System International (SI)
Fluid Power
14. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Compression
Power
Area
15. Allows comparison between different measuring systems and units - Necessary to market internationally
Pythagorean Theorem
Inclined Plane
Aerodynamics
Conversions
16. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Units for Pressure
Derived Dimension
Power Equation
Work
17. What we are studying
First Stroke (2 Stroke Engine)
Aerodynamics
System
Mechanical Advantage Equation
18. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Derived Dimension
Law of Conservation of Mass
First Stroke (rotary)
Moment Arm
19. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Hydraulic Cylinders
Machine
decrease
Power Equation
20. 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
Metrology
Fluid Power
Pythagorean Theorem
Work
21. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
System International (SI)
Second Stroke (rotary)
Rotation
Temperature
22. 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
US Customary
First Stroke (Diesel Engine)
2 Stroke Engine
Units
23. Psi - newtons - pascals
Volume
Newton's First Law of Motion
Inclined Plane
Units for Pressure
24. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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25. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
more than one force
Static
Pythagorean Theorem
Hydrodynamics
26. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components
Machine
If the force is applied at the center of the rotation
System
First Stroke (4 Stroke Engine)
27. Intake of fuel and air mixture - compression of mixture by piston
Hydraulics
Power Equation
Mechanics
First Stroke (2 Stroke Engine)
28. Compression-Tension-Shear
Drum Brakes
Mechanics describe how forces affect a body
Engineers and scientists need a common language
Direction of Forces
29. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Power
Second Stroke (Diesel Engine)
Rotary
Torque
30. Length / Time
Rotation
More than one force
Velocity
Component
31. Rotation will not occur - but translation might occur
Mechanics
Area
If the force is applied at the center of the rotation
If the force is applied away from the center of rotation
32. 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
Forces
Weight
Gravity
Rotary
33. Liquid or gas
Newton's First Law of Motion
Second Stroke (2 Stroke Engine)
First Stroke (Diesel Engine)
Fluid
34. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force
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35. Exhaust of combustion products
First Stroke (Diesel Engine)
Common Brake Characteristics
4 Stroke Engine
Fourth Stroke (rotary)
36. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
decrease
Equation for Mechanical Advantage regarding inclined planes
Component
Law of Conservation of Mass
37. Can be applied at a time on an object
Closed System
More than one force
Pressure Equation
Tension
38. Mass x acceleration
Newton's Third Law
Force Equation
US Customary
Dynamics
39. An indication of kinetic energy of mass at the molecular level
Pressure Equation
Torque
First Stroke (2 Stroke Engine)
Temperature
40. When the sum of all forces and the sum of all moments both equal forces - No movement
Closed System
Static
Pressure Equation
Equilibrium
41. Applied at an angle or parallel to a surface
Inclined Plane
Shear
Pythagorean Theorem
Hydraulics
42. 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
4 Stroke Engine
Force Equation
Conversions
Vectors
43. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (
Dynamics
System International (SI)
Pressure Equation
Static
44. A^2+b^2=c^2 - used to calculate vectors
US Customary
Force lets us do work on a system
System
Pythagorean Theorem
45. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
First Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
Mechanical Advantage
Diesel Engine
46. Force x Distance
Mechanical Advantage Equation
Moment Arm Equation
Newton's Second Law
Engineers and scientists need a common language
47. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E
Second Stroke (4 Stroke Engine)
Hybrid
Mechanics describe how forces affect a body
Pythagorean Theorem
48. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Force Equation
Base Dimensions
Area
Pressure Equation
49. Same pressure - work - volume - Different forces and distances
Force lets us do work on a system
Open System
Third Stroke (4 Stroke Engine)
Hydraulic Cylinders
50. Exhaust
Fourth Stroke (Diesel Engine)
Steam Engine
Derived Dimension
Pythagorean Theorem
Can you answer 50 questions in 15 minutes?
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