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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. Compression-Tension-Shear
Mechanical Advantage
Direction of Forces
will move
Pythagorean Theorem
2. Psi - newtons - pascals
First Stroke (2 Stroke Engine)
First Stroke (Diesel Engine)
Weight
Units for Pressure
3. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Vectors
Second Stroke (rotary)
Component
Units
4. Force x Distance
Derived Dimension
no movement
Internal Combustion Engine Types
Moment Arm Equation
5. Describes a physical property of anything - What we are measuring
Effort
Compression
Dimension
Area
6. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Surroundings
Second Stroke (rotary)
no movement
7. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
4 Stroke Engine
Derived Dimension
Static
8. 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
Common Brake Characteristics
First Stroke (rotary)
Rotary
Fluid Power
9. An indication of kinetic energy of mass at the molecular level
Temperature
Moment Arm Equation
Hydraulics
Surroundings
10. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Engineers and scientists need a common language
Third Stroke (4 Stroke Engine)
Pressure Equation
Closed System
11. Static - Dynamic
Third Stroke (rotary)
Second Stroke (rotary)
Mechanics describe how forces affect a body
Units for Pressure
12. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Newton's First Law of Motion
Couple
Internal Combustion Engine Types
Power
13. When the fluid is in motion
Hybrid Parallel
Hydrodynamics
will move
Third Stroke (4 Stroke Engine)
14. The force simple machines use to do work on a single load or against a single force
Effort
Pressure
no movement
Drum Brakes
15. 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
Work
Metrology
Mass
Dynamics
16. Allows comparison between different measuring systems and units - Necessary to market internationally
Conversions
Statics
Third Stroke (4 Stroke Engine)
Hybrid
17. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Third Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
Fluid Power
Area
18. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Disc Breaks
Power Equation
Mechanical Engineering
Moment Arm Equation
19. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Equilibrium
Gravity
Engineers and scientists need a common language
more than one force
20. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Inclined Plane
Forces and Vectors
Gravity
Pascal's Principle
21. Intake of fuel and air mix
Dynamics
Velocity
Area
First Stroke (rotary)
22. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Third Stroke (Diesel Engine)
Pascal's Principle
Diesel Engine
decrease
23. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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24. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Rotation
Engineers and scientists need a common language
Pressure
Length
25. 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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26. What we are studying
System
More than one force
Rotary
Common Brake Characteristics
27. 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.
Internal Combustion Engine Types
Velocity
2 Stroke Engine
Mechanics
28. The magnitude of something in a particular direction
Inclined Plane
Metrology
Length
Engineers and scientists need a common language
29. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (
Steam Engine
Derived Dimension
System International (SI)
Pascal's Principle
30. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Newton's Second Law
Hybrid Parallel
Volume
System
31. 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
Open System
Internal Combustion Engine Types
Mechanics describe how forces affect a body
Hydraulics
32. When the sum of all forces and the sum of all moments both equal forces - No movement
Pressure
2 Stroke Engine
Hybrid Series
Equilibrium
33. Mass can neither by created nor destroyed - only transformed
If the force is applied at the center of the rotation
Law of Conservation of Mass
Pressure Equation
Dynamics
34. Force without machine/Force with machine
Drum Brakes
Moment Arm Equation
Mechanical Advantage Equation
Force Equation
35. Exhaust of combustion products
Third Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
US Customary
Fourth Stroke (4 Stroke Engine)
36. 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
Hybrid Series
Mechanical Advantage
Area
Vectors
37. 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
Newton's Third Law
Static
Pressure
38. Movement along a line (reciprocal or linear motion) -Units: feet and meters
System
Moment Arm
Translation
Static
39. What we are not studying
First Stroke (4 Stroke Engine)
If the force is applied away from the center of rotation
Surroundings
Steam Engine
40. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Open System
Steam Engine
Power Equation
Units
41. 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
Gravity
Inclined Plane
Base Dimensions
Moment Arm
42. Often a free body has _______ acting on it
Gravity
more than one force
Third Stroke (Diesel Engine)
Couple
43. (pi) x (radius)^2
Fluid
Area of a circle equation
Hydraulic Cylinders
Gravity
44. Dimensions and units
Area of a circle equation
Engineers and scientists need a common language
Static
If the force is applied at the center of the rotation
45. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Second Stroke (2 Stroke Engine)
Mechanical Advantage Equation
Fluids
If the force is applied at the center of the rotation
46. Same pressure - work - volume - Different forces and distances
Pressure Equation
Hydraulic Cylinders
Newton's First Law of Motion
Fourth Stroke (4 Stroke Engine)
47. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Torque
Velocity
Inclined Plane
Pressure Equation
48. When the work done by the effort exceeds the work done by the load - the load...
Engineers and scientists need a common language
Mass
will move
Aerodynamics
49. Length x Width
Moment Arm Equation
Force Equation
Area Equation
Statics
50. Rotation will not occur - but translation might occur
Weight
4 Stroke Engine
If the force is applied at the center of the rotation
Area of a circle equation
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