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Test your basic knowledge |
Mechanical Engineering
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Often a free body has _______ acting on it
Disc Breaks
4 Stroke Engine
Volume
more than one force
2. Psi - newtons - pascals
Mechanics describe how forces affect a body
Units for Pressure
Mechanical Advantage Equation
Inclined Plane
3. 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
Machine
Forces
4 Stroke Engine
Gravity
4. The force simple machines use to do work on a single load or against a single force
Gravity
Units
Direction of Forces
Effort
5. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Pythagorean Theorem
Fluid Power
Hydraulic Cylinders
Length
6. 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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7. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Newton's Third Law
System
Component
Tension
8. Work/force or vertical distance/sloping distance
Second Stroke (2 Stroke Engine)
Vectors
decrease
Equation for Mechanical Advantage regarding inclined planes
9. Compression of fuel mix
Forces
Area of a circle equation
Mechanics
Second Stroke (rotary)
10. Static - Dynamic
System International (SI)
Third Stroke (4 Stroke Engine)
Mechanics describe how forces affect a body
Fourth Stroke (4 Stroke Engine)
11. An indication of kinetic energy of mass at the molecular level
Second Stroke (rotary)
Temperature
Equilibrium
Metrology
12. When fluid is at rest
Base Dimensions
If the force is applied away from the center of rotation
Internal Combustion Engine Types
Hydrostatics
13. When the fluid is in motion
Machine
Newton's Third Law
Weight
Hydrodynamics
14. Intake of fuel and air mixture - compression of mixture by piston
First Stroke (2 Stroke Engine)
will move
Equation for Mechanical Advantage regarding inclined planes
Applied Brakes
15. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Mechanics
Effort
Couple
Direction of Forces
16. Same pressure - work - volume - Different forces and distances
Hydraulic Cylinders
Hybrid Parallel
System
Forces
17. What we are studying
Fourth Stroke (Diesel Engine)
System
First Stroke (rotary)
Mechanics
18. 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
Pythagorean Theorem Equation
Mechanical Advantage Equation
Hydraulics
Force Equation
19. Rotation may occur
Closed System
Velocity
Vectors
If the force is applied away from the center of rotation
20. 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
Mechanical Advantage
Fluid
Volume
Rotation
21. 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
Hybrid Series
Force lets us do work on a system
decrease
22. Force/Area
Component
Pressure Equation
Mechanical Advantage
Closed System
23. Exhaust of combustion products
Fourth Stroke (rotary)
Internal Combustion Engine Types
Compression
Units
24. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Compression
Steam Engine
Gravity
First Stroke (4 Stroke Engine)
25. Rotation will not occur - but translation might occur
System
If the force is applied at the center of the rotation
Pythagorean Theorem
Mechanical Advantage Equation
26. A^2+b^2=c^2 - used to calculate vectors
Steam Engine
Gravity
Surroundings
Pythagorean Theorem
27. Piston travels up and both plugs are closed
Static
System International (SI)
Steam Engine
Second Stroke (4 Stroke Engine)
28. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.
Direction of Forces
Law of Conservation of Mass
Metrology
2 Stroke Engine
29. Describes how applied forces bring a body into rest or equilibrium
Hybrid Parallel
Statics
Equilibrium
Vectors
30. (pi) x (radius)^2
Second Stroke (Diesel Engine)
Vectors
Fluid Power
Area of a circle equation
31. Air is drawn in
Moment Arm Equation
Applied Brakes
US Customary
First Stroke (Diesel Engine)
32. A^2+b^2=c^2
Machine
If the force is applied away from the center of rotation
First Stroke (rotary)
Pythagorean Theorem Equation
33. Length / Time
decrease
Velocity
Conversions
Fluid
34. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Acceleration
Pythagorean Theorem
Common Brake Characteristics
Moment Arm Equation
35. When the sum of all forces and the sum of all moments both equal forces - No movement
Conversions
Vectors
First Stroke (rotary)
Equilibrium
36. When the moving fluid is a gas
Tension
Aerodynamics
Dimension
Second Stroke (Diesel Engine)
37. ICE generates electricity for electric battery -Electric motor turns wheels
Mechanical Advantage Equation
Second Stroke (rotary)
First Stroke (Diesel Engine)
Hybrid Series
38. Exhaust
Length
More than one force
Engineers and scientists need a common language
Fourth Stroke (Diesel Engine)
39. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
Hydraulic Cylinders
Vectors
Power Equation
40. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Applied Brakes
Disc Breaks
Hydrostatics
Units for Pressure
41. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Pascal's Principle
Forces
Derived Dimension
42. Mass x acceleration
Hybrid Series
Force Equation
Effort
Area of a circle equation
43. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Shear
Gravity
Hybrid Series
4 Stroke Engine
44. When the work done by the effort exceeds the work done by the load - the load...
Base Dimensions
Pascal's Principle
Third Stroke (4 Stroke Engine)
will move
45. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Diesel Engine
Vectors
First Stroke (2 Stroke Engine)
46. Describes a physical property of anything - What we are measuring
Hybrid Parallel
Gravity
Dimension
Area Equation
47. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Equation for Mechanical Advantage regarding inclined planes
Drum Brakes
Dynamics
Tension
48. Can be applied at a time on an object
Power
More than one force
Volume
Volume
49. Allows comparison between different measuring systems and units - Necessary to market internationally
Hybrid Parallel
First Stroke (4 Stroke Engine)
Conversions
Forces and Vectors
50. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Force Equation
2 Stroke Engine
Area
Area of a circle equation
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