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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. When the sum of all forces and the sum of all moments both equal forces - No movement
Newton's First Law of Motion
Equilibrium
Open System
Law of Conservation of Mass
2. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Mechanical Advantage Equation
Rotary
Disc Breaks
Length
3. Allows comparison between different measuring systems and units - Necessary to market internationally
Shear
Conversions
Work
Fluid Power
4. Psi - newtons - pascals
Units for Pressure
First Stroke (2 Stroke Engine)
Equation for Mechanical Advantage regarding inclined planes
Moment Arm Equation
5. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area of a circle equation
Inclined Plane
Area
Units
6. A^2+b^2=c^2
Pythagorean Theorem Equation
Mechanics describe how forces affect a body
Velocity
Internal Combustion Engine Types
7. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Fourth Stroke (rotary)
Surroundings
Hydraulics
Hybrid Parallel
8. Mass x acceleration
Force Equation
Effort
Second Stroke (2 Stroke Engine)
Temperature
9. When fluid is at rest
Translation
Hydrodynamics
Hydrostatics
Units for Pressure
10. When the work done by the effort exceeds the work done by the load - the load...
will move
System
Third Stroke (4 Stroke Engine)
no movement
11. The magnitude of something in a particular direction
Pythagorean Theorem
Mechanical Advantage
Length
Second Stroke (rotary)
12. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Pascal's Principle
Hybrid Parallel
Closed System
First Stroke (4 Stroke Engine)
13. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Moment Arm Equation
System
Second Stroke (rotary)
14. Combustion ignited by spark plug and materials are compressed
Moment Arm Equation
Third Stroke (4 Stroke Engine)
Forces and Vectors
Applied Brakes
15. Force without machine/Force with machine
Fourth Stroke (Diesel Engine)
Pascal's Principle
Mechanical Advantage Equation
Law of Conservation of Mass
16. Static - Dynamic
Newton's Third Law
Mechanics describe how forces affect a body
Volume
Result of Applying a force to a rigid body at rest
17. Dimensions and units
Velocity
Newton's First Law of Motion
Engineers and scientists need a common language
Forces and Vectors
18. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Torque
Fourth Stroke (4 Stroke Engine)
Hybrid Parallel
Rotary
19. 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
Fluid Power
First Stroke (4 Stroke Engine)
Effort
Hydraulics
20. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Aerodynamics
Force Equation
Shear
21. Piston travels up and both plugs are closed
Second Stroke (rotary)
Drum Brakes
Second Stroke (4 Stroke Engine)
Third Stroke (4 Stroke Engine)
22. Mass can neither by created nor destroyed - only transformed
Power Equation
Tension
Law of Conservation of Mass
Volume
23. Can be applied at a time on an object
More than one force
Newton's Third Law
Closed System
Forces
24. Three- dimensional property measured in units of length times length times length =length x width x height
Second Stroke (4 Stroke Engine)
Area Equation
Volume
Component
25. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
If the force is applied at the center of the rotation
Drum Brakes
decrease
Engineers and scientists need a common language
26. 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
Vectors
Third Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
Rotary
27. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Forces and Vectors
Torque
Length
Hydraulic Cylinders
28. Ignition - power stroke
Mechanical Advantage
Base Dimensions
Rotation
Third Stroke (rotary)
29. 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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30. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Volume
Hybrid
First Stroke (4 Stroke Engine)
Torque
31. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Second Stroke (2 Stroke Engine)
Common Brake Characteristics
Third Stroke (rotary)
Pythagorean Theorem
32. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Volume
Mechanics describe how forces affect a body
Metrology
Rotation
33. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Shear
Mechanical Engineering
Third Stroke (rotary)
no movement
34. A combination of components
System
Hybrid Series
Result of Applying a force to a rigid body at rest
Work
35. Intake of fuel and air mix
Hydraulics
Machine
Aerodynamics
First Stroke (rotary)
36. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Gravity
Volume
Law of Conservation of Mass
37. 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 (Diesel Engine)
more than one force
Second Stroke (Diesel Engine)
Common Brake Characteristics
38. Length x Width x Height
Pythagorean Theorem
Units for Pressure
Volume
Second Stroke (4 Stroke Engine)
39. (pi) x (radius)^2
Disc Breaks
Result of Applying a force to a rigid body at rest
Gravity
Area of a circle equation
40. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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41. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Units
Translation
Open System
Hydrostatics
42. Length / Time
Velocity
Gravity
Power Equation
Pressure
43. 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
Moment Arm
Work
4 Stroke Engine
Component
44. ...
Newton's First Law of Motion
Units
Force lets us do work on a system
Fourth Stroke (rotary)
45. Applied at an angle or parallel to a surface
Shear
Rotation
Fourth Stroke (4 Stroke Engine)
Newton's First Law of Motion
46. Same pressure - work - volume - Different forces and distances
Area of a circle equation
Disc Breaks
Hydraulics
Hydraulic Cylinders
47. 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
Fourth Stroke (Diesel Engine)
Weight
Applied Brakes
Tension
48. 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
4 Stroke Engine
Newton's First Law of Motion
Mass
Third Stroke (4 Stroke Engine)
49. Force/Area
will move
Pressure Equation
Hybrid
Hybrid Series
50. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
First Stroke (2 Stroke Engine)
Volume
Metrology
Forces
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