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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. 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
4 Stroke Engine
First Stroke (Diesel Engine)
Hydraulic Cylinders
Steam Engine
2. Exhaust
no movement
Fourth Stroke (Diesel Engine)
Drum Brakes
will move
3. 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)
Area Equation
Units
Mechanical Advantage
4. Dimensions and units
Law of Conservation of Mass
Aerodynamics
Engineers and scientists need a common language
Mechanical Engineering
5. Describes how applied forces bring a body into rest or equilibrium
US Customary
Torque
Statics
Mechanical Engineering
6. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Force Equation
Force lets us do work on a system
Common Brake Characteristics
7. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Fourth Stroke (rotary)
Machine
no movement
Pythagorean Theorem
8. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Direction of Forces
Metrology
Base Dimensions
Vectors
9. Piston travels up and both plugs are closed
Couple
Open System
Derived Dimension
Second Stroke (4 Stroke Engine)
10. The magnitude of something in a particular direction
Torque
Shear
Conversions
Length
11. 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
Hydraulics
Metrology
Volume
First Stroke (2 Stroke Engine)
12. An indication of kinetic energy of mass at the molecular level
Temperature
Mechanics
First Stroke (Diesel Engine)
Weight
13. Fuel is injected and combusts due to temperature of compressed air
Steam Engine
Temperature
Engineers and scientists need a common language
Third Stroke (Diesel Engine)
14. Work/force or vertical distance/sloping distance
Mechanical Advantage
Second Stroke (4 Stroke Engine)
Equation for Mechanical Advantage regarding inclined planes
will move
15. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Disc Breaks
Newton's Second Law
Forces
Aerodynamics
16. External Combustion engine -Only used in factories and plants (not used in cars)
Internal Combustion Engine Types
Steam Engine
Weight
Velocity
17. (pi) x (radius)^2
Rotary
Hydraulic Cylinders
First Stroke (2 Stroke Engine)
Area of a circle equation
18. ...
First Stroke (Diesel Engine)
Open System
Mechanics describe how forces affect a body
Force lets us do work on a system
19. Often a free body has _______ acting on it
Hydrodynamics
Area
Diesel Engine
more than one force
20. Length x Width
Moment Arm
more than one force
Hydraulic Cylinders
Area Equation
21. 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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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
Static
Common Brake Characteristics
Pressure
Pythagorean Theorem Equation
23. What we are studying
Diesel Engine
System
Forces and Vectors
Mechanical Advantage
24. Force/Area
Pressure Equation
Gravity
Rotary
Component
25. 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 (
System International (SI)
Second Stroke (rotary)
Torque
Translation
26. 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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27. The branch of science and engineering involving measurement
Torque
Force Equation
Mechanical Engineering
Metrology
28. 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
Law of Conservation of Mass
Power Equation
Power Equation
29. A pull on an object
Result of Applying a force to a rigid body at rest
Translation
Force Equation
Tension
30. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Newton's Second Law
Rotation
Pythagorean Theorem Equation
Result of Applying a force to a rigid body at rest
31. When the work done by the effort exceeds the work done by the load - the load...
Third Stroke (rotary)
Law of Conservation of Mass
Force Equation
will move
32. 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.
decrease
Inclined Plane
Hybrid Series
2 Stroke Engine
33. Weight/Time
Component
Dimension
Mass
Power Equation
34. Force x Distance
Weight
Hydraulic Cylinders
Moment Arm Equation
Dynamics
35. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Diesel Engine
Fluids
Statics
Disc Breaks
36. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Rotary
Aerodynamics
Hybrid Parallel
Force lets us do work on a system
37. 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
US Customary
System International (SI)
Applied Brakes
Length
38. Mass can neither by created nor destroyed - only transformed
Mechanical Advantage Equation
Law of Conservation of Mass
First Stroke (4 Stroke Engine)
Hydraulic Cylinders
39. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Hybrid
System
Component
Rotary
40. Same pressure - work - volume - Different forces and distances
Force lets us do work on a system
Velocity
Mechanical Engineering
Hydraulic Cylinders
41. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Aerodynamics
Newton's Second Law
decrease
If the force is applied away from the center of rotation
42. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Area Equation
Result of Applying a force to a rigid body at rest
Gravity
43. Force without machine/Force with machine
Effort
Pythagorean Theorem
Mechanical Advantage Equation
Area Equation
44. Describes how applied forces bring a body into motion
Dynamics
Surroundings
System
Pressure
45. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Hydraulics
Open System
Translation
Mechanical Advantage Equation
46. (Force)(Distance)/Seconds
will move
Power Equation
Conversions
Drum Brakes
47. Exhaust of combustion products
Newton's Third Law
Rotary
Diesel Engine
Fourth Stroke (rotary)
48. Air is drawn in
Closed System
Volume
Direction of Forces
First Stroke (Diesel Engine)
49. Rotation will not occur - but translation might occur
Pressure
If the force is applied at the center of the rotation
Steam Engine
Mass
50. One that pushes on an object
Pythagorean Theorem
Applied Brakes
Compression
Mechanics describe how forces affect a body
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