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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. Translation (slide) -Rotate -Slide and Rotate Together
4 Stroke Engine
Result of Applying a force to a rigid body at rest
Aerodynamics
Acceleration
2. Exhaust of combustion products
Fourth Stroke (rotary)
Temperature
Metrology
Open System
3. Length x Width
First Stroke (rotary)
First Stroke (2 Stroke Engine)
Area Equation
Result of Applying a force to a rigid body at rest
4. Mechanics is an application of math that describes how forces affect a body
Internal Combustion Engine Types
Newton's Third Law
Mechanics
Applied Brakes
5. 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
Hybrid Series
Fluid Power
Rotary
Aerodynamics
6. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Moment Arm
Result of Applying a force to a rigid body at rest
Hydrodynamics
Translation
7. Three- dimensional property measured in units of length times length times length =length x width x height
Power Equation
Statics
Volume
Couple
8. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Base Dimensions
Hydrostatics
Drum Brakes
More than one force
9. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Fourth Stroke (Diesel Engine)
Units
Temperature
Newton's Second Law
10. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Equilibrium
Dynamics
First Stroke (4 Stroke Engine)
Velocity
11. When the work done by the effort exceeds the work done by the load - the load...
Work
Open System
Component
will move
12. 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
Static
Mass
Diesel Engine
Third Stroke (Diesel Engine)
13. 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.
Force lets us do work on a system
Hydraulics
2 Stroke Engine
Mechanical Advantage
14. What we are not studying
Component
Surroundings
Velocity
Mechanics describe how forces affect a body
15. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Hybrid Parallel
Mechanical Advantage Equation
Mechanics
Internal Combustion Engine Types
16. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Surroundings
Hybrid Parallel
Moment Arm Equation
Torque
17. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Open System
Dynamics
Rotary
Second Stroke (rotary)
18. Intake of fuel and air mixture - compression of mixture by piston
Rotary
First Stroke (2 Stroke Engine)
Hybrid Series
Weight
19. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Length
Closed System
Couple
Forces
20. Ignition - power stroke
Third Stroke (rotary)
First Stroke (Diesel Engine)
Pythagorean Theorem Equation
Hybrid Series
21. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Mechanics describe how forces affect a body
US Customary
Open System
22. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Couple
Acceleration
If the force is applied at the center of the rotation
Translation
23. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
decrease
Area
Pythagorean Theorem
Forces
24. (pi) x (radius)^2
Metrology
Equilibrium
System
Area of a circle equation
25. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Applied Brakes
System International (SI)
Moment Arm
Mechanics describe how forces affect a body
26. A pull on an object
Mechanical Advantage Equation
Gravity
Tension
Area Equation
27. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Force Equation
Power Equation
Pressure
Moment Arm Equation
28. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Static
Pythagorean Theorem Equation
Hybrid Series
29. 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
Torque
Newton's Third Law
Direction of Forces
Machine
30. Liquid or gas
Gravity
Pascal's Principle
Fluid
Rotation
31. When the moving fluid is a gas
Diesel Engine
Aerodynamics
Area
Units for Pressure
32. One that pushes on an object
Compression
Length
Pythagorean Theorem
Equation for Mechanical Advantage regarding inclined planes
33. 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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34. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion
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35. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Moment Arm Equation
System International (SI)
First Stroke (rotary)
Area
36. What we are studying
Gravity
Power Equation
System
Hydraulic Cylinders
37. 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
First Stroke (Diesel Engine)
Mechanical Advantage
Base Dimensions
Mechanical Advantage Equation
38. The magnitude of something in a particular direction
Fluids
Length
Volume
Second Stroke (4 Stroke Engine)
39. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Hybrid Parallel
Derived Dimension
Equilibrium
Rotation
40. Applied at an angle or parallel to a surface
Disc Breaks
Shear
no movement
Weight
41. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
System
Weight
Aerodynamics
Acceleration
42. Weight/Time
Shear
Power Equation
Rotary
Applied Brakes
43. Static - Dynamic
4 Stroke Engine
Third Stroke (rotary)
Mechanics describe how forces affect a body
US Customary
44. (Force)(Distance)/Seconds
Force lets us do work on a system
Power Equation
Forces
Component
45. Force without machine/Force with machine
Dynamics
Dimension
Newton's Third Law
Mechanical Advantage Equation
46. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Mechanical Advantage Equation
Velocity
Second Stroke (rotary)
47. ...
Dimension
Pressure
Area
Force lets us do work on a system
48. When the sum of all forces and the sum of all moments both equal forces - No movement
Pythagorean Theorem
Equilibrium
Weight
Surroundings
49. 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
Common Brake Characteristics
Equation for Mechanical Advantage regarding inclined planes
Torque
If the force is applied at the center of the rotation
50. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Moment Arm
no movement
Third Stroke (4 Stroke Engine)
Power