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Test your basic knowledge |
Mechanical Engineering
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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. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
US Customary
System
4 Stroke Engine
Diesel Engine
2. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Acceleration
Drum Brakes
Second Stroke (Diesel Engine)
3. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Moment Arm
Pythagorean Theorem Equation
Area Equation
Tension
4. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Gravity
Third Stroke (Diesel Engine)
Rotation
Newton's Second Law
5. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am
Inclined Plane
Second Stroke (4 Stroke Engine)
Steam Engine
Disc Breaks
6. A^2+b^2=c^2 - used to calculate vectors
Steam Engine
Pythagorean Theorem
Mechanics
2 Stroke Engine
7. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Machine
Torque
Pythagorean Theorem Equation
If the force is applied at the center of the rotation
8. Exhaust
Disc Breaks
Second Stroke (Diesel Engine)
Hydrostatics
Fourth Stroke (Diesel Engine)
9. A pull on an object
Fluids
Tension
Third Stroke (rotary)
Mass
10. 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)
Shear
Second Stroke (Diesel Engine)
11. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Machine
Area Equation
Pythagorean Theorem
Power
12. Mass x acceleration
Third Stroke (rotary)
Force Equation
Velocity
decrease
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
Hydraulics
Pressure Equation
Derived Dimension
Second Stroke (2 Stroke Engine)
14. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
4 Stroke Engine
Length
Dimension
Derived Dimension
15. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Mechanical Engineering
Acceleration
Moment Arm
Translation
16. Applied at an angle or parallel to a surface
Vectors
Shear
Hybrid Parallel
Fluids
17. Length x Width
Weight
Steam Engine
Area Equation
Newton's Third Law
18. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Mechanical Advantage Equation
Couple
Derived Dimension
Moment Arm
19. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Second Stroke (Diesel Engine)
Area
If the force is applied away from the center of rotation
20. Force x Distance
Moment Arm Equation
Pressure
First Stroke (2 Stroke Engine)
Force Equation
21. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Mass
Open System
Surroundings
Fourth Stroke (4 Stroke Engine)
22. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Torque
Tension
Hybrid
Hybrid Parallel
23. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Aerodynamics
2 Stroke Engine
Component
Hydraulic Cylinders
24. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Fourth Stroke (Diesel Engine)
Inclined Plane
Gravity
Volume
25. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Inclined Plane
Mechanics
Base Dimensions
Equation for Mechanical Advantage regarding inclined planes
26. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Translation
Weight
System
Forces and Vectors
27. 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
Newton's First Law of Motion
Work
Acceleration
Hybrid Series
28. 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)
Compression
Work
Second Stroke (rotary)
Power
29. Work/force or vertical distance/sloping distance
Engineers and scientists need a common language
Derived Dimension
Vectors
Equation for Mechanical Advantage regarding inclined planes
30. Force/Area
System International (SI)
Pressure Equation
Torque
Third Stroke (4 Stroke Engine)
31. Liquid or gas
Mass
Fluid
Mechanics describe how forces affect a body
Open System
32. Translation (slide) -Rotate -Slide and Rotate Together
4 Stroke Engine
Second Stroke (Diesel Engine)
Result of Applying a force to a rigid body at rest
Units
33. Force without machine/Force with machine
Drum Brakes
Mechanical Advantage Equation
Internal Combustion Engine Types
Mass
34. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Volume
Newton's First Law of Motion
Vectors
35. Compression-Tension-Shear
Volume
Forces
Hydrostatics
Direction of Forces
36. Intake of fuel and air mixture - compression of mixture by piston
Steam Engine
Forces and Vectors
Temperature
First Stroke (2 Stroke Engine)
37. 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
Mechanical Engineering
Statics
Second Stroke (2 Stroke Engine)
Hydraulics
38. The force simple machines use to do work on a single load or against a single force
Fourth Stroke (4 Stroke Engine)
Newton's Third Law
Effort
Statics
39. Often a free body has _______ acting on it
more than one force
will move
Area
Translation
40. What we are not studying
Pythagorean Theorem
Tension
Newton's Second Law
Surroundings
41. 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
Weight
Force Equation
Third Stroke (Diesel Engine)
42. When the fluid is in motion
Hydraulics
If the force is applied away from the center of rotation
Equation for Mechanical Advantage regarding inclined planes
Hydrodynamics
43. 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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44. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Component
Machine
Pythagorean Theorem Equation
Translation
45. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Units for Pressure
Moment Arm
Statics
Forces
46. (pi) x (radius)^2
Area of a circle equation
Power
4 Stroke Engine
more than one force
47. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Dimension
Area of a circle equation
Mechanical Advantage
Drum Brakes
48. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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49. One that pushes on an object
Compression
Equilibrium
Hydrostatics
Work
50. Length / Time
Velocity
Effort
Hydrostatics
Vectors
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