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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. The magnitude of something in a particular direction
Area of a circle equation
First Stroke (rotary)
Length
Mechanical Advantage Equation
2. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
2 Stroke Engine
Effort
Metrology
Base Dimensions
3. A^2+b^2=c^2
Pythagorean Theorem Equation
Power
Power Equation
Mechanical Advantage Equation
4. Rotation may occur
System
If the force is applied away from the center of rotation
More than one force
Second Stroke (4 Stroke Engine)
5. Body in motion (car)
Equation for Mechanical Advantage regarding inclined planes
Volume
Dynamics
Pythagorean Theorem
6. Piston travels up and both plugs are closed
will move
Second Stroke (4 Stroke Engine)
Newton's Second Law
Force lets us do work on a system
7. When fluid is at rest
Hydrostatics
Second Stroke (4 Stroke Engine)
Statics
Component
8. 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
Gravity
Power Equation
Hydraulics
9. 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)
will move
Power
Power Equation
Pressure Equation
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
Surroundings
Result of Applying a force to a rigid body at rest
Rotary
System
11. Liquid or gas
Result of Applying a force to a rigid body at rest
Fluid
Acceleration
Mass
12. Three- dimensional property measured in units of length times length times length =length x width x height
Mechanical Advantage
First Stroke (4 Stroke Engine)
Volume
Derived Dimension
13. Ignition - power stroke
Internal Combustion Engine Types
Newton's Second Law
Third Stroke (rotary)
Mechanical Engineering
14. (Force)(Distance)/Seconds
Effort
Force lets us do work on a system
Result of Applying a force to a rigid body at rest
Power Equation
15. Compression of fuel mix
Pascal's Principle
Volume
Force lets us do work on a system
Second Stroke (rotary)
16. Exhaust
Result of Applying a force to a rigid body at rest
Area Equation
Area
Fourth Stroke (Diesel Engine)
17. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Velocity
Pressure Equation
Forces and Vectors
Component
18. 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
Pressure Equation
Static
Hydrostatics
19. Body at rest or is in equilibrium (wall)
Hybrid
Static
Closed System
Newton's Third Law
20. A combination of components
Pythagorean Theorem
Diesel Engine
System
Machine
21. 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
Power Equation
Pressure Equation
Work
Shear
22. 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
Third Stroke (rotary)
More than one force
Common Brake Characteristics
Acceleration
23. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Area of a circle equation
Aerodynamics
Fluids
Steam Engine
24. A pull on an object
Second Stroke (4 Stroke Engine)
Tension
Second Stroke (rotary)
Forces and Vectors
25. Exhaust of combustion products
Fourth Stroke (rotary)
Third Stroke (4 Stroke Engine)
Common Brake Characteristics
Gravity
26. The force simple machines use to do work on a single load or against a single force
Effort
will move
Second Stroke (4 Stroke Engine)
Mechanical Advantage Equation
27. External Combustion engine -Only used in factories and plants (not used in cars)
Equation for Mechanical Advantage regarding inclined planes
Area of a circle equation
Newton's Second Law
Steam Engine
28. Length x Width
Open System
Applied Brakes
Forces
Area Equation
29. Describes how applied forces bring a body into motion
Moment Arm
Dynamics
Internal Combustion Engine Types
Common Brake Characteristics
30. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Power Equation
Conversions
First Stroke (Diesel Engine)
31. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Hybrid
Pythagorean Theorem
Compression
Derived Dimension
32. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Rotary
Applied Brakes
Open System
Power Equation
33. Mechanics is an application of math that describes how forces affect a body
Mechanical Engineering
Internal Combustion Engine Types
Mechanics
Units
34. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Derived Dimension
Engineers and scientists need a common language
Hydrostatics
35. Rotation will not occur - but translation might occur
Aerodynamics
Fourth Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
Units
36. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Result of Applying a force to a rigid body at rest
will move
First Stroke (rotary)
Diesel Engine
37. Length / Time
Diesel Engine
System International (SI)
Velocity
Hydraulic Cylinders
38. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Metrology
Acceleration
no movement
Pythagorean Theorem
39. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Open System
Machine
Translation
Velocity
40. (pi) x (radius)^2
Gravity
Area of a circle equation
Drum Brakes
Area Equation
41. Compression-Tension-Shear
Forces
Aerodynamics
Second Stroke (rotary)
Direction of Forces
42. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Area
Aerodynamics
Closed System
Forces
43. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Moment Arm
Closed System
Hydrodynamics
Gravity
44. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Diesel Engine
System
4 Stroke Engine
Torque
45. The branch of science and engineering involving measurement
Metrology
Mass
4 Stroke Engine
Power Equation
46. Often a free body has _______ acting on it
more than one force
Units
no movement
Weight
47. Dimensions and units
Engineers and scientists need a common language
Area Equation
Hydraulic Cylinders
Power
48. 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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49. ICE generates electricity for electric battery -Electric motor turns wheels
First Stroke (2 Stroke Engine)
Second Stroke (2 Stroke Engine)
Disc Breaks
Hybrid Series
50. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
If the force is applied at the center of the rotation
Inclined Plane
Metrology