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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 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 First Law of Motion
Velocity
US Customary
Pythagorean Theorem Equation
2. Weight/Time
Law of Conservation of Mass
Moment Arm
no movement
Power Equation
3. 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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4. Describes how applied forces bring a body into motion
If the force is applied at the center of the rotation
decrease
Moment Arm
Dynamics
5. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Result of Applying a force to a rigid body at rest
Mass
Power Equation
6. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Pythagorean Theorem
Component
First Stroke (4 Stroke Engine)
Dynamics
7. Force x Distance
Moment Arm Equation
Aerodynamics
Fluid Power
Mass
8. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Mechanical Engineering
Translation
Base Dimensions
decrease
9. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
Gravity
Hybrid Parallel
Machine
10. Dimensions and units
Machine
Engineers and scientists need a common language
Couple
more than one force
11. Applied at an angle or parallel to a surface
First Stroke (rotary)
Internal Combustion Engine Types
Derived Dimension
Shear
12. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Units
System
Torque
13. Three- dimensional property measured in units of length times length times length =length x width x height
Mechanics describe how forces affect a body
Hybrid Parallel
Volume
Machine
14. The force simple machines use to do work on a single load or against a single force
Inclined Plane
Power
Effort
Pressure
15. Psi - newtons - pascals
decrease
Newton's Second Law
Units for Pressure
Dimension
16. 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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17. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Mechanical Engineering
Fluid Power
Disc Breaks
US Customary
18. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Vectors
Pythagorean Theorem
Pressure
System
19. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Statics
2 Stroke Engine
Drum Brakes
Weight
20. 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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21. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
US Customary
Forces and Vectors
Engineers and scientists need a common language
Gravity
22. Air is drawn in
Steam Engine
First Stroke (Diesel Engine)
Mechanics describe how forces affect a body
System
23. Body at rest or is in equilibrium (wall)
Static
more than one force
Conversions
Component
24. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast
System
Vectors
Diesel Engine
Mechanical Advantage
25. Length / Time
Fourth Stroke (rotary)
Pythagorean Theorem Equation
Metrology
Velocity
26. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
4 Stroke Engine
Open System
Power Equation
Pythagorean Theorem
27. External Combustion engine -Only used in factories and plants (not used in cars)
Translation
Mechanics
Rotary
Steam Engine
28. When the sum of all forces and the sum of all moments both equal forces - No movement
Gravity
Second Stroke (2 Stroke Engine)
Equilibrium
Newton's Second Law
29. A^2+b^2=c^2
Pythagorean Theorem Equation
Common Brake Characteristics
Compression
Hydrostatics
30. ICE generates electricity for electric battery -Electric motor turns wheels
Units for Pressure
Power Equation
Hybrid Series
Fluid
31. A pull on an object
Result of Applying a force to a rigid body at rest
System International (SI)
Applied Brakes
Tension
32. Liquid or gas
Area
Effort
Fluid
Mechanical Advantage
33. Same pressure - work - volume - Different forces and distances
Direction of Forces
Effort
Equation for Mechanical Advantage regarding inclined planes
Hydraulic Cylinders
34. Compression-Tension-Shear
Surroundings
Newton's Third Law
Pythagorean Theorem
Direction of Forces
35. The branch of science and engineering involving measurement
Conversions
Gravity
First Stroke (4 Stroke Engine)
Metrology
36. An indication of kinetic energy of mass at the molecular level
Force lets us do work on a system
Temperature
Rotary
System International (SI)
37. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Surroundings
Mechanical Advantage Equation
Fourth Stroke (4 Stroke Engine)
Fluids
38. Intake of fuel and air mix
Force Equation
First Stroke (rotary)
Newton's Third Law
Pythagorean Theorem
39. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems
Common Brake Characteristics
Mechanical Engineering
Tension
Mechanical Advantage
40. 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
Effort
Shear
Hybrid
Hydraulics
41. 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
If the force is applied away from the center of rotation
Hybrid
Machine
Forces
42. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Dynamics
2 Stroke Engine
Applied Brakes
Translation
43. 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
Open System
Work
Mechanical Advantage
Force Equation
44. The magnitude of something in a particular direction
Engineers and scientists need a common language
Length
Pressure
Couple
45. Translation (slide) -Rotate -Slide and Rotate Together
Disc Breaks
Moment Arm Equation
Direction of Forces
Result of Applying a force to a rigid body at rest
46. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
System
Second Stroke (4 Stroke Engine)
Hybrid
Moment Arm
47. Static - Dynamic
Units for Pressure
Open System
Shear
Mechanics describe how forces affect a body
48. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Work
System International (SI)
Units
Units for Pressure
49. One that pushes on an object
Weight
Compression
Third Stroke (Diesel Engine)
Power
50. Rotation will not occur - but translation might occur
Direction of Forces
If the force is applied at the center of the rotation
Rotation
Weight