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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. Describes how applied forces bring a body into rest or equilibrium
Statics
First Stroke (2 Stroke Engine)
Surroundings
Units
2. Body at rest or is in equilibrium (wall)
System
Mechanics
Static
Units
3. Describes a physical property of anything - What we are measuring
Statics
First Stroke (4 Stroke Engine)
Dimension
If the force is applied at the center of the rotation
4. What we are studying
Temperature
Dynamics
Hydrostatics
System
5. A^2+b^2=c^2 - used to calculate vectors
Pythagorean Theorem
Component
Mechanics describe how forces affect a body
Statics
6. Length x Width
Area Equation
Couple
4 Stroke Engine
Pythagorean Theorem
7. 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
Area of a circle equation
Compression
Result of Applying a force to a rigid body at rest
Common Brake Characteristics
8. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Mechanics describe how forces affect a body
Forces
More than one force
Units
9. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical
4 Stroke Engine
Mechanical Advantage
Derived Dimension
Units for Pressure
10. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Length
Hybrid Series
Third Stroke (rotary)
Pythagorean Theorem
11. (Force)(Distance)/Seconds
If the force is applied away from the center of rotation
Fourth Stroke (rotary)
Drum Brakes
Power Equation
12. 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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13. Length / Time
Velocity
Power Equation
Third Stroke (rotary)
Internal Combustion Engine Types
14. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area
Hydrodynamics
Dimension
Mechanics
15. When the moving fluid is a gas
Second Stroke (4 Stroke Engine)
Aerodynamics
Second Stroke (2 Stroke Engine)
2 Stroke Engine
16. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
4 Stroke Engine
Compression
Second Stroke (2 Stroke Engine)
Drum Brakes
17. 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
Compression
First Stroke (2 Stroke Engine)
Base Dimensions
18. When the fluid is in motion
Common Brake Characteristics
Hydrodynamics
Hybrid
Acceleration
19. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Hydrodynamics
Diesel Engine
Compression
Mechanical Engineering
20. Can be applied at a time on an object
Gravity
First Stroke (Diesel Engine)
More than one force
Area
21. A pull on an object
Closed System
Fourth Stroke (4 Stroke Engine)
First Stroke (2 Stroke Engine)
Tension
22. When fluid is at rest
Compression
Units for Pressure
Hydrostatics
Area Equation
23. The magnitude of something in a particular direction
Second Stroke (Diesel Engine)
Shear
Length
Power Equation
24. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Internal Combustion Engine Types
Translation
Mass
Weight
25. Air is compressed - work is done on the system
Pascal's Principle
Temperature
Area of a circle equation
Second Stroke (Diesel Engine)
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
Result of Applying a force to a rigid body at rest
Machine
Steam Engine
Pythagorean Theorem Equation
27. Intake of fuel and air mix
Fluid
More than one force
First Stroke (rotary)
Mechanical Engineering
28. 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
If the force is applied away from the center of rotation
First Stroke (rotary)
US Customary
29. 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
Internal Combustion Engine Types
US Customary
Dynamics
30. 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
Units for Pressure
Translation
Hydraulics
Mass
31. Applied at an angle or parallel to a surface
Shear
Metrology
Pascal's Principle
Dynamics
32. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Static
Volume
Mechanical Engineering
33. 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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34. Force/Area
Pressure Equation
Power Equation
Third Stroke (4 Stroke Engine)
Derived Dimension
35. Static - Dynamic
Pythagorean Theorem
Mechanics describe how forces affect a body
Translation
If the force is applied away from the center of rotation
36. Body in motion (car)
Force lets us do work on a system
Newton's Second Law
Equation for Mechanical Advantage regarding inclined planes
Dynamics
37. Rotation may occur
Length
If the force is applied away from the center of rotation
Tension
Base Dimensions
38. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
First Stroke (2 Stroke Engine)
Power Equation
Acceleration
39. Psi - newtons - pascals
Equation for Mechanical Advantage regarding inclined planes
Result of Applying a force to a rigid body at rest
First Stroke (2 Stroke Engine)
Units for Pressure
40. Air is drawn in
Diesel Engine
First Stroke (Diesel Engine)
Rotation
Shear
41. Rotation will not occur - but translation might occur
Hybrid Parallel
If the force is applied at the center of the rotation
Vectors
First Stroke (4 Stroke Engine)
42. Weight/Time
Gravity
Equation for Mechanical Advantage regarding inclined planes
Power Equation
Conversions
43. What we are not studying
Surroundings
Mechanical Advantage Equation
Effort
Result of Applying a force to a rigid body at rest
44. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Power
Rotation
Velocity
First Stroke (Diesel Engine)
45. 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
If the force is applied at the center of the rotation
Mechanical Engineering
Static
46. Exhaust
Fourth Stroke (Diesel Engine)
more than one force
Newton's Second Law
Weight
47. 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
Area Equation
Pythagorean Theorem
Metrology
Work
48. (pi) x (radius)^2
Hydrodynamics
Area of a circle equation
Work
US Customary
49. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda
Applied Brakes
Third Stroke (Diesel Engine)
Surroundings
System
50. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Forces and Vectors
First Stroke (Diesel Engine)
Fluid Power
System International (SI)